Nanava, G, Xu, Qingjun, Was, Z
In practical applications PHOTOS Monte Carlo is often used for simulation of QED effects in decay of intermediate particles and resonances. Generated in such a way that samples of events cover the...
Nanava, G., Xu, Qingjun, Was, Z.
In practical applications PHOTOS Monte Carlo is often used for simulation of QED effects in decay of intermediate particles and resonances. Generated in such a way that samples of events cover the...
TAUOLA, TAUOLA universal interface PHOTOS and MC-TESTER: Status Report (2009)
The status of Monte Carlo programs for the simulation of tau-lepton production and decay in high-energy accelerator experiments is reviewed. No basic changes in the organization of the programs were...
Davidson, N, Golonka, P, Przedzinski, T, Was, Z
Theoretical predictions in high energy physics are routinely provided in the form of Monte Carlo generators. Comparisons of predictions from different programs and/or different initialization set-ups...
MC-TESTER v. 1.23: a universal tool for comparisons of Monte Carlo predictions (2008)
Davidson, N., Golonka, P., Przedzinski, T., Was, Z.
Theoretical predictions in high energy physics are routinely provided in the form of Monte Carlo generators. Comparisons of predictions from different programs and/or different initialization set-ups...
PHOTOS Monte Carlo and its theoretical accuracy (2008)
Was, Z., Golonka, P., Nanava, G.
Because of properties of QED, the bremsstrahlung corrections to decays of particles or resonances can be calculated, with a good precision, separately from other effects. Thanks to the widespread use...
Historical and mathematical aspects of iterative solutions for Monte Carlo simulations (2008)
Over the last 25 years Monte Carlo programs were being developped in Cracow in the group guided by Prof. Stanislaw Jadach. Many of those programs became standard in their application domains. In the...
Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes (2008)
In this note we discuss possible separations of exact, massive, tree-level spin amplitudes into gauge invariant parts. We concentrate our attention on processes involving two quarks entering a color-...
Gauge invariant sub-structures of tree-level double-emission exact QCD spin amplitudes (2008)
In this note we discuss possible separations of exact, massive, tree-level spin amplitudes into gauge invariant parts. We concentrate our attention on processes involving two quarks entering a color-...
Tevatron-for-LHC report: Top and electroweak physics (2007)
Gerber, C.E., Murat, P., Tait, T.M.P., Wackeroth, D., Arbuzov, A., Bardin, D., ...
The top quark and electroweak bosons (W and Z) represent the most massive fundamental particles yet discovered, and as such refer directly to the Standard Model's greatest remaining mystery: the...
PHOTOS Monte Carlo for precision simulation of QED in decays (2007)
Because of properties of QED, the bremsstrahlung corrections to decays of particles or resonances can be calculated, with a good precision, separately from other effects. Thanks to the widespread use...
Was, Z., Golonka, P., Nanava, G.
Because of properties of QED, the bremsstrahlung corrections to decays of particles or resonances can be calculated, with a good precision, separately from other effects. Thanks to the widespread use...
Tevatron-for-LHC Report: Top and Electroweak Physics (2007)
Gerber, : C. E., Murat, P., Tait, T. M. P., Wackeroth, D., Arbuzov, A., Bardin, D., ...
The top quark and electroweak bosons (W and Z) represent the most massive fundamental particles yet discovered, and as such refer directly to the Standard Model's greatest remaining mystery: the...
Constrained MC for QCD evolution with rapidity ordering and minimum kT (2007)
Jadach, S, Placzek, W, Skrzypek, M, Stephens, P, Was, Z
With the imminent start of LHC experiments, development of phenomenological tools, and in particular the Monte Carlo programs and algorithms, becomes urgent. A new algorithm for the generation of a...
Constrained MC for QCD evolution with rapidity ordering and minimum kT (2007)
Jadach, S., Placzek, W., Skrzypek, M., Stephens, P., Was, Z.
With the imminent start of LHC experiments, development of phenomenological tools, and in particular the Monte Carlo programs and algorithms, becomes urgent. A new algorithm for the generation of a...
Hierarchically Organized Iterative Solutions of the Evolution Equations in QCD (2007)
Jadach, S., Skrzypek, M., Was, Z.
The task of Monte Carlo simulation of the evolution of the parton distributions in QCD and of constructing new parton shower Monte Carlo algorithms requires new way of organizing solutions of the QCD...
Precision simulations with TAUOLA and PHOTOS (2006)
The status of the Monte Carlo programs for the simulation of tau-lepton production and decay in high-energy accelerator experiments is reviewed. No significant changes in the organization of the...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Scalar QED, NLO and PHOTOS Monte Carlo (2006)
Recently, due to improvement at experiments, QED bremsstrahlung in B meson decays into pair of scalars (\pi's and/or K's) is of phenomenological interest. In practical application where experimental...
Scalar QED, NLO and PHOTOS Monte Carlo (2006)
Recently, QED bremsstrahlung in $B$-meson decays into pair of scalars (\pi's and/or K's) is of interest. If experimental acceptance must be taken into account, PHOTOS Monte Carlo is often used in...
Next to Leading Logarithms and the PHOTOS Monte Carlo (2006)
With the approaching start-up of the experiments at LHC, the urgency to quantify systematic uncertainties of the generators, used in the interpretation of the data, is becoming pressing. The PHOTOS...
Next to Leading Logarithms and the PHOTOS Monte Carlo (2006)
With the approaching start-up of the experiments at LHC, the urgency to quantify systematic uncertainties of the generators, used in the interpretation of the data, is becoming pressing. The PHOTOS...
Next to Leading Logarithms and the PHOTOS Monte Carlo (2006)
With the approaching start-up of the experiments at LHC, the urgency to quantify systematic uncertainties of the generators, used in the interpretation of the data, is becoming pressing. The PHOTOS...
tau Decays to Five Mesons in TAUOLA (2006)
The tau-decay library TAUOLA has gained popularity over the last decade. However, with the continuously increasing precision of the data, some of its functionality has become insufficient. One of the...
tau Decays to Five Mesons in TAUOLA (2006)
The tau-decay library TAUOLA has gained popularity over the last decade. However, with the continuously increasing precision of the data, some of its functionality has become insufficient. One of the...
tau Decays to Five Mesons in TAUOLA (2006)
The tau-decay library TAUOLA has gained popularity over the last decade. However, with the continuously increasing precision of the data, some of its functionality has become insufficient. One of the...
Jacholkowska, A., Kalinowski, J., Was, Z.
A brief description of the library of the Standard Model and anomalous $WW\gamma$ coupling contribution to the matrix element for $e^+e^ \to \nu \bar{\nu} n\gamma$ process is given. It can be used...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
Alekhin, S., Altarelli, G., Amapane, N., Andersen, J., Andreev, V., Arneodo, M., ...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to...
HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings Part A (2006)
S. Alekhin, DESY Forschung Hochenergiephysik, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, ...
Internal report | Preprint
S. Alekhin, DESY Forschung Hochenergiephysik, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, ...
Internal report | Preprint
Looking for CP violation in B -> tau+tau- decays (2005)
Kalinowski, J., Chankowski, P. H., Was, Z., Worek, M.
In supersymmetry with large tan(beta) the decays B0(B0bar) -> l+l- are dominated by the scalar and pseudoscalar Higgs penguin diagrams leading to strong enhancement of leptonic decay rates with...
PHOTOS as a pocket parton shower: flexibility tests for the algorithm (2005)
In this note we will recall the main tests that document robustness and flexibility of the PHOTOS design. This aspect may be of broader use and may find extensions in future applications, also...
PHOTOS as a pocket parton shower: flexibility tests for the algorithm (2005)
In this note we will recall the main tests that document robustness and flexibility of the PHOTOS design. This aspect may be of broader use and may find extensions in future applications, also...
We present a discussion of the precision for the PHOTOS Monte Carlo algorithm, with improved implementation of QED interference and multiple-photon radiation. The main application of PHOTOS is the...
PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays (2005)
We present a discussion of the precision for the PHOTOS Monte Carlo algorithm, with improved implementation of QED interference and multiple-photon radiation. The main application of PHOTOS is the...
Initial-final-state interference in the Z line-shape (2005)
Jadach, S., Pietrzyk, B., Tournefier, E., Ward, B.F.L., Was, Z.
TAUOLA as tau Monte Carlo for future applications (2004)
The status of the Monte Carlo programs for the simulation of tau-lepton production and decay in high-energy accelerator experiments is reviewed. In particular, the status of the following packages is...
TAUOLA as tau Monte Carlo for future applications (2004)
The status of the Monte Carlo programs for the simulation of tau-lepton production and decay in high-energy accelerator experiments is reviewed. In particular, the status of the following packages is...
New Results on Precision Studies of Heavy Vector Boson Physics (2004)
Ward, B F L, Glosser, C, Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, M, Was, Z, ...
We present new results for two important heavy vector boson physics processes: (1), virtual corrections to hard bremsstrahlung which are relevant to precision predictions for the radiative return...
New Results on Precision Studies of Heavy Vector Boson Physics (2004)
Ward, B. F. L., Glosser, C., Jadach, S., Placzek, W., Skrzypek, M., Was, Z., ...
We present new results for two important heavy vector boson physics processes: (1), virtual corrections to hard bremsstrahlung which are relevant to precision predictions for the radiative return...
One of the necessary steps in constructing high precision option of KKMC was to install the double bremsstrahlung matrix element for the process e+ e- to nu_e bar nu_e into the scheme of Coherent...
Les Houches Guidebook to Monte Carlo Generators for Hadron Collider Physics (2004)
Dobbs, M. A., Frixione, S., Laenen, E., Tollefson, K., Baer, H., Boos, E., ...
Recently the collider physics community has seen significant advances in the formalisms and implementations of event generators. This review is a primer of the methods commonly used for the...
Richter-Was, E., Szymocha, T., Was, Z.
In this paper we argue that having available higher order fully exclusive Monte Carlo generator for Higgs boson production from heavy quark fusion will be mandatory for data analysis at LHC. The H to...
In the present report, let us adress the issues related to simulation of decays for particle embodied in full production and decay chains of Monte Carlo programs set-up for experiments such as at LHC...
The tauola-photos-F environment for the TAUOLA and PHOTOS packages, release II (2003)
Golonka, P, Kersevan, Borut P, Pierzchala, T, Richter-Was, Elzbieta, Was, Z, Worek, M
We present the system for versioning two packages: the TAUOLA of tau-lepton decay and PHOTOS for radiative corrections in decays. The following features can be chosen in an automatic or...
The tauola-photos-F environment for the TAUOLA and PHOTOS packages, release II (2003)
Golonka, P., Kersevan, B., Pierzchala, T., Richter-Was, E., Was, Z., Worek, M.
We present the system for versioning two packages: the TAUOLA of tau-lepton decay and PHOTOS for radiative corrections in decays. The following features can be chosen in an automatic or...
Desch, Klaus, Imhof, A, Was, Z, Worek, M
The prospects for the measurement of the pseudoscalar admixture in the h-tau-tau coupling to a Standard Model Higgs boson of 120 GeV mass are discussed in a quantitative manner e+ e- collisions of...
Desch, K., Imhof, A., Was, Z., Worek, M.
The prospects for the measurement of the pseudoscalar admixture in the h-tau-tau coupling to a Standard Model Higgs boson of 120 GeV mass are discussed in a quantitative manner e+ e- collisions of...
Using the SANC system we study the one-loop electroweak standard model predictions, including virtual and real photon emission, for the decays of the on-shell vector boson, $W \to l {\nu_l}...
Using the SANC system we study the one-loop electroweak standard model predictions, including virtual and real photon emission, for the decays of the on-shell vector boson, W --> L ANTI-NU (GAMMA)....
We demonstrate that a measurement of the impact parameter in one-prong tau decay can be useful for the determination of the Higgs boson parity in the H/A --> tau tau; tau --> rho nu decay chain. We...
Electric Charge Screening Effect in Single-W Production with the KoralW Monte Carlo (2003)
Jadach,S., Placzek,W., Skrzypek,M., Ward,B. F. L., Was,Z.
Any Monte Carlo event generator in which only initial state radiation (ISR) is implemented, or ISR is simulated independently of the final state radiation (FSR), may feature too many photons with...
Electric Charge Screening Effect in Single-W Production with the KoralW Monte Carlo (2003)
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
Any Monte Carlo event generator in which only initial state radiation (ISR) is implemented, or ISR is simulated independently of the final state radiation (FSR), may feature too many photons with...
Comparison of SANC with KORALZ and PHOTOS (2002)
Andonov, A., Jadach, S., Nanava, G., Was, Z.
Using the SANC system we study the one-loop electroweak standard model prediction, including virtual and real photon emissions, for the decays of on-shell vector and scalar bosons B --> f anti-f...
Precision calculation for e+ e- -> 2f: the KK MC project (2002)
Ward, B. F. L., Jadach, S., Was, Z.
We present the current status of the coherent exclusive (CEEX) realization of the YFS theory for the processes in e+ e- -> 2f via the KK MC. We give a brief summary of the CEEX theory in comparison...
Status report on TAUOLA, its environment, and its applications (2002)
The status of the Monte Carlo programs for the simulation of the tau-lepton production and decay in high energy accelerator experiments is reviewed. In particular, the status of the following...
Golonka, P., Pierzchala, T., Was, Z.
Theoretical predictions in high energy physics are routinely provided in the form of Monte Carlo generators. Comparisons of predictions from different programs and/or different initialization set-ups...
Precision W-pair physics with the YFSWW3 and KoralW Monte Carlos (2002)
Skrzypek, M., Jadach, S., Placzek, W., Ward, B. F. L., Was, Z.
We present the recent developments in the precision studies of W-pair and single-W processes in e+e- collisions achieved with the help of the KoralW and YFSWW3 Monte Carlo generators. We focus on the...
Electric Charge Screening Effect in Single-W Production with the KoralW Monte Carlo (2002)
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
Any Monte Carlo event generator in which only initial state radiation (ISR) is implemented, or ISR is simulated independently of the final state radiation (FSR), may feature too many photons with...
Measuring the Higgs boson's parity using tau --> rho nu (2002)
Bower, G. R., Pierzchala, T., Was, Z., Worek, M.
We present a very promising method for a measurement of the Higgs boson parity using the H/A -> tau^+ tau^- --> rho^+ nu rho^- nu --> pi^+ pi^0 nu pi^- pi^0 nu decay chain. The method is both model...
Spin polarization and the Einstein--Podolsky--Rosen paradox in the Monte Carlo event records (2002)
In the future high energy physics experiments, the question of properly matching the phenomenological programs that describe different parts of the physics processes (such as hard scattering,...
Transverse spin effects in H/A -> tau^+ tau^- ; tau^{+-} -> nu X^{+-}, Monte Carlo approach (2002)
The transverse spin effects may be helpful to distinguish between scalar (J^{PC}=0^{++}) or pseudoscalar (J^{PC}=0^{-+}) nature of the spin zero (Higgs) particle once discovered in future accelerator...
Bruneliere, R., Denner, A., Dittmaier, S., Jadach, S., Jezequel, S., Placzek, W., ...
We discuss theoretical uncertainties of the distribution in the cosine of the W polar angle projected into a measurement of the anomalous triple gauge-boson coupling...
Novosibirsk hadronic currents for tau -> 4pi channels of tau decay library TAUOLA (2002)
Bondar, A. E., Eidelman, S. I., Milstein, A. I., Pierzchala, T., Root, N. I., Was, Z., ...
The new parameterization of form factors developed for 4pi channels of the tau lepton decay and based on Novosibirsk data on e^+e^- -> 4pi has been coded in a form suitable for the TAUOLA Monte Carlo...
Bruneliere,R., Denner,A., Dittmaier,S., Jadach,S., Jezequel,S., Placzek,W., ...
We discuss theoretical uncertainties of the distribution in the cosine of the W polar angle projected into a measurement of the anomalous triple gauge-boson coupling...
Bruneliere, R., Denner, A., Dittmaier, S., Jadach, S., Jezequel, S., Placzek, W., ...
We discuss theoretical uncertainties of the distribution in the cosine of the W polar angle projected into a measurement of the anomalous triple gauge-boson coupling...
Predictions for ${\bar \nu} \nu \gamma$ Production at LEP (2001)
Bardin, D., Jadach, S., Riemann, T., Was, Z.
We study predictions for the reaction $e^+e^- \to {\bar \nu} \nu (n \gamma)$. The complete one-loop corrections are taken into account and higher order contributions, in particular those for the...
On Theoretical Uncertainties of the W Boson Mass Measurement at LEP2 (2001)
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
We discuss theoretical uncertainties of the measurement of the $W$ boson mass at LEP2 energies, reconstructed with the help of the tandem of the Monte Carlo event generators KoralW and YFSWW3....
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
The version 1.51 of the Monte Carlo (MC) program KoralW for all $e^+e^-\to f_1\bar f_2 f_3\bar f_4$ processes is presented. The most important change since the previous version 1.42 is the facility...
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
We present the Monte Carlo event generator YFSWW3 version 1.16 for theprocess of W-pair production and decay in electron-positron collisions. It includes ${\cal O}(\alpha)$ electroweak radiative...
Spin effects in tau-lepton pair production at LHC (2001)
Pierzchala, T., Richter-Was, E., Was, Z., Worek, M.
Question of the proper incorporation of spin effects in tau lepton decays is often of importance. In present work, case of the Z/gamma to tau+ tau- production mechanism is studied in detail. As an...
Coherent Exclusive Exponentiation of 2f Processes in e+e- Annihilation (2001)
Was, Z., Jadach, S., Ward, B. F. L.
In the talk we present the Coherent Exclusive Exponentiation (CEEX) which is implemented in the KK MC event generator for the process e+e- to f bar f +n gamma, f=mu,tau,d,u,s,c,b for center of mass...
Report of the QCD working group (2001)
Ballestrero, A., Grunewald, M W., Passarino, G., Accomando, E., Bambade, P., Bardin, D Yu., ...
en cours
Four-Fermion Production in Electron-Positron Collisions / (2001)
Grunewald, M W., Passarino, G., Accomando, E., Ballestrero, A., Bambade, P., Bardin, D Yu., ...
This report summarises the results of the four-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the calculation of four-fermion processes in...
On Theoretical Uncertainties of the W Boson Mass Measurement at LEP2 (2001)
Jadach,S., Placzek,W., Skrzypek,M., Ward,B. F. L., Was,Z.
We discuss theoretical uncertainties of the measurement of the $W$ boson mass at LEP2 energies, reconstructed with the help of the tandem of the Monte Carlo event generators KoralW and YFSWW3....
On Theoretical Uncertainties of the W Boson Mass Measurement at LEP2 (2001)
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
We discuss theoretical uncertainties of the measurement of the $W$ boson mass at LEP2 energies, reconstructed with the help of the tandem of the Monte Carlo event generators KoralW and YFSWW3....
W-Pair Production with YFSWW/KoralW (2000)
Placzek, W., Jadach, S., Skrzypek, M., Ward, B. F. L., Was, Z.
A theoretical description of W-pair production in terms of two complementary Monte Carlo event generators YFSWWand KoralW is presented. The way to combine the results of these two programs in order...
TAUOLA the library for tau lepton decay, and KKMC/KORALB/KORALZ/... status report (2000)
The status of the Monte Carlo programs for the simulation of the $\tau$ lepton production in high energy accelerator experiments and decay is reviewed. In particular, the status of the following...
Ward, B. F. L., Jadach, S., Płaczek, W., Skrzypek, M., Was, Z.
We present the new Coherent Exclusive Exponentiation (CEEX), in comparison to the older Exclusive Exponentiation (EEX) and the semi-analytical Inclusive Exponentiation (IEX), for the process e+e- ->...
The tauola-photos_F environment for versioning the TAUOLA and PHOTOS packages (2000)
Golonka, P., Richter-Was, E., Was, Z.
We present the system for versioning two packages: the TAUOLA of tau lepton decay and PHOTOS for radiative corrections in decays. The following features can be chosen in automatic or semi-automatic...
Precision Predictions for (Un)Stable $W^{+}W^{-}$ Pair Production at and Beyond LEP2 Energies (2000)
Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, M, Ward, B F L, Was, Z
We present precision calculations of the processes e+e- -> 4-fermions in which the double resonant W+W- intermediate state occurs. Referring to this latter intermediate state as the 'signal process',...
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
We present precision calculations of the processes e+e- -> 4-fermions in which the double resonant W+W- intermediate state occurs. Referring to this latter intermediate state as the 'signal process',...
Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations (2000)
Jadach, S., Ward, B. F. L., Was, Z.
We present the new Coherent Exclusive Exponentiation (CEEX), the older Exclusive Exponentiation (EEX) and the semi-analytical Inclusive Exponentiation (IEX) for the process $e^+e^-\to f\bar{f}...
Four-Fermion Production in Electron-Positron Collisions (2000)
Gruenewald, Martin W., Passarino, Giampiero, Accomando, E., Ballestrero, A., Bambade, P., Bardin, D., ...
This report summarises the results of the four-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the calculation of four-fermion processes in...
Jacholkowska, A., Kalinowski, J., Was, Z.
A brief description of the library of the Standard Model and anomalous $WW\gamma$ coupling contribution to the matrix element for $e^+e^ \to \nu \bar{\nu} n\gamma$ process is given. It can be used...
Report of the QCD working group (2000)
Ballestrero, A., Grunewald, M W., Passarino, G., Accomando, E., Bambade, P., Bardin, D Yu., ...
en cours
Four-Fermion Production in Electron-Positron Collisions / (2000)
Grunewald, M W., Passarino, G., Accomando, E., Ballestrero, A., Bambade, P., Bardin, D Yu., ...
This report summarises the results of the four-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the calculation of four-fermion processes in...
Jacholkowska, A., Kalinowski, J., Was, Z.
A brief description of the library of the Standard Model and anomalous $WW\gamma$ coupling contribution to the matrix element for $e^+e^ \to \nu \bar{\nu} n\gamma$ process is given. It can be used...
Report of the QCD working group (2000)
Ballestrero, A., Grunewald, M W., Passarino, G., Accomando, E., Bambade, P., Bardin, D Yu., ...
en cours
Four-Fermion Production in Electron-Positron Collisions / (2000)
Grunewald, M W., Passarino, G., Accomando, E., Ballestrero, A., Bambade, P., Bardin, D Yu., ...
This report summarises the results of the four-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the calculation of four-fermion processes in...
The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions (1999)
Jadach, S., Ward, B. F. L., Was, Z.
We present the Monte Carlo event generator KK version 4.13 for precision predictions of the Electroweak Standard Model for the process $e^+e^-\to f\bar{f} +n\gamma$, $f=\mu,\tau,d,u,s,c,b$ at centre...
Initial-Final-State Interference in the Z line-shape (1999)
Jadach, S., Pietrzyk, B., Tournefier, E., Ward, B. F. L., Was, Z.
The uncertainty in the determination of the Z line-shape parameters coming from the precision of the calculation of the Initial-State Radiation and Initial--Final-State Interference is 2 10**(-4) for...
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
We present the LL final state radiative effects for the exact O(alpha) YFS exponentiated (un)stable WW pair production at LEP2/NLC energies using Monte Carlo event generator methods. The respective...
Monte Carlo Program KoralW 1.42 for All Four-Fermion Final States in e+e- Collisions (1999)
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
The Monte Carlo program KoralW version 1.42 is presented. It generates all four-fermion final states with multibranch dedicated Monte Carlo pre-samplers and complete, massive, Born matrix elements....
Coherent Exclusive Exponentiation CEEX: the Case of the Resonant e+ e- Collision (1999)
Jadach, S., Ward, B. F. L., Was, Z.
We present the first-order coherent exclusive exponentiation (CEEX) scheme, with the full control over spin polarization for all fermions. In particular it is applicable to difficult case of narrow...
Global Positioning of Spin GPS Scheme for Half-Spin Massive Spinors (1999)
Jadach, S., Ward, B. F. L., Was, Z.
We present a simple and flexible method of keeping track of the complex phases and spin quantization axes for half-spin initial- and final-state Weyl spinors in scattering amplitudes of Standard...
Jacholkowska, A., Kalinowski, J., Was, Z.
A brief description of the library of the Standard Model and anomalous WWgamma coupling contribution to the matrix element for e+e- -> \nu \bar{\nu} n\gamma process is given. It can be used with any...
Jadach, S., Ward, B. F. L., Was, Z.
Brief information on new features of KORALZ version 4.04 with respect to version 4.0 is given. The main difference is that the new version could be used at LEP2 energies, i.e. up to 240 GeV...
Library of anomalous tau-tau-gamma couplings for tau+ tau- (n gamma) Monte Carlo programs (1999)
We briefly describe a library that may be used with any e+ e- --> tau+ tau- (n gamma) Monte Carlo program to account for the effects of anomalous tau-tau-gamma couplings. The implementation of this...
How to Generate Four-Fermion Phase Space (1999)
We present a scheme for integrating the matrix element of an arbitrary e^+e^-\to f_1f_2\bar f_3\bar f_4 process over the complete four-fermion phase space, or its any part, by means of the Monte...
Precision Calculations of Heavy Boson Production - YFS Monte Carlo Approach (1999)
Skrzypek, M., Jadach, S., Placzek, W., Ward, B. F. L., Was, Z.
In this talk I present the current status of the family of Monte Carlo programs for four-fermion physics based on the Yennie-Frautschie-Suura resummation of soft real and virtual photons. I focus on...
Initial-final-state interference in the Z line-shape (1999)
Jadach, S., Pietrzyk, B., Tournefier, E., Ward, B.F.L., Was, Z.
Initial-final-state interference in the Z line-shape (1999)
Jadach, S., Pietrzyk, B., Tournefier, E., Ward, B.F.L., Was, Z.
Higher-order QED corrections to e+e- to nu bar nu gamma at LEP2 (1998)
Jacholkowska, A., Kalinowski, J., Was, Z.
The process e+e- to nu barnu + gamma with a distinctive ``photon-plus-missing-energy'' signal can serve as an important tool to search for new physics at LEP2. It can be exploited to measure the WW...
Inclusion of tau anomalous magnetic and electric dipole moments in the KORALZ Monte Carlo (1998)
We describe modifications made to KORALZ version 4.03 in order to allow for anomalous magnetic and electric dipole moments of the tau. We discuss the verification of the method at LEP 1 energies.
Event Generators for WW Physics (1997)
Bardin, D., Accomando, R. Kleiss; E., Anlauf, H., Ballestrero, A., Berends, F. A., Boos, E., ...
The report summarizes the results of the activities of the Working Group on Event Generators for WW Physics at CERN during 1995.
Trefoil knot and ad-hoc classification of elementary fields in the Standard Model (1997)
We present an arbitrary model based on the trefoil knot to construct objects of the same spectrum as that of elementary particles. It includes `waves' and three identical sets of sources. Due to...
Jadach, S., Placzek, W., Skrzypek, M., Ward, B. F. L., Was, Z.
We realize, by Monte Carlo event generator methods, the exact O}(\alpha)$ YFS exponentiated calculation of $e^+e^- \to W^+ W^- (\to f_1\bar f'_1 + \bar f_2 f'_2)$ at and beyond LEP2 energies, where...
Jadach, S., Ward, B. F. L., Was, Z.
We discuss the allowed parameter regime in the coupling-mass plane implied by the existing LEP2 data on e+ e- -> hadrons at 172.3 GeV for the leptoquark interpretation of the anomalous DESY...
Four-quark final state in W-pair production: Case of signal and background (1997)
Ishikawa, T., Kurihara, Y., Skrzypek, M., Was, Z.
We discuss theoretical predictions for W-pair production and decay at LEP2 and higher energies in a form suitable for comparison with raw data. We present a practical framework for calculating...
Event Generators For WW Physics (1996)
D. Bardin, Conveners D. Bardin, R. Kleiss, F. Piccinini, R. Pittau, A. Pukhov, ...
this report we shall deal with the practical implementation of the theoretical results described in the WW study group report. There, many important results and formulae have been given which have to...