Wiesiek Placzek

The Femto-experiment for the LHC: The W-boson beams and their targets (2005)

Krasny, M W, Jadach, Stanislaw, Placzek, Wiesiek

The LHC has been designed as a collider of proton and ion beams. However, in its experimental program, which is focused mainly on studies of high energy transfer collisions of Standard Model...

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...

Comparisons of the Monte Carlo programs HORACE and WINHAC for single-W-boson production at hadron colliders (2004)

Carloni-Calame, C M, Jadach, Stanislaw, Montagna, G, Nicrosini, O, Placzek, Wiesiek

We present the comparisons of two independent Monte Carlo event generators, HORACE and WINHAC, for single-W-boson production in hadronic collisions with multiphoton effects in leptonic W decays....

Multiphoton Radiation in Leptonic W-Boson Decays (2003)

Placzek, Wiesiek, Jadach, Stanislaw

We present the calculation of multiphoton radiation effects in leptonic W-boson decays in the framework of the Yennie-Frautschi-Suura exclusive exponentiation. This calculation is implemented in the...

Precision W-pair physics with the YFSWW3 and KoralW Monte Carlos (2002)

Skrzypek, Maciej, Jadach, Stanislaw, Placzek, Wiesiek, Ward, B F L, Was, Zbigniew

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, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Ward, B F L, Was, Zbigniew

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...

Precision predictions for W-pair production at LEP2 (2002)

Placzek, Wiesiek

Theoretical calculations for the W-pair production process at LEP2 in terms of Monte Carlo event generators RacoonWW and KorlaW&YFSWW3 are reviewed. The discussion concentrates on precision...

On Theoretical Uncertainties of the W Angular Distribution in W-Pair Production at LEP2 Energies (2002)

Brunelière, R, Denner, A, Dittmaier, S, Jadach, Stanislaw, Jézéquel, S, Placzek, Wiesiek, ...

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...

On Theoretical Uncertainties of the W Boson Mass Measurement at LEP2 (2001)

Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Ward, B F L, Was, Zbigniew

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....

The Monte Carlo Program KoralW version 1.51 and The Concurrent Monte Carlo KoralW\&YFSWW3 with All Background Graphs and First Order Corrections to W-Pair Production (2001)

Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Ward, B F L, Was, Zbigniew

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...

The Monte Carlo Event Generator YFSWW3 version 1.16 for W-Pair Production and Decay at LEP2/LC Energies (2001)

Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Ward, B F L, Was, Zbigniew

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...

Precision Predictions for (Un)Stable $WW/4f$ Production in $e^{+}e^{-}$ Annihilation (2001)

Ward, B F L, Skrzypek, Maciej, Placzek, Wiesiek, Jadach, Stanislaw

We present precision calculations of the processes e+ e- -> 4-fermions in which the double resonant W+ W- and ZZ intermediate states occur. Referring to these latter intermediate states as the...

Precision Predictions for (Un)Stable $WW/4f$ Production in $e^{+}e^{-}$ Annihilation: YFSWW3/KoralW-1.42/YFSZZ (2001)

Ward, B F L, Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej

We present precision calculations of the processes e+ e- -> 4-fermions in which the double resonant W+ W- and ZZ intermediate states occur. Referring to these latter intermediate states as the...

W-Pair Production with YFSWW/KoralW (2000)

Placzek, Wiesiek, Jadach, Stanislaw, Skrzypek, Maciej, Ward, B F L, Was, Zbigniew

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...

Coherent Exclusive Exponentiation for Precision Monte Carlo Calculations of Fermion Pair Production (2000)

Ward, B F L, Was, Zbigniew, Skrzypek, Maciej, Placzek, Wiesiek, Jadach, Stanislaw

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- ->...

Coherent Exclusive Exponentiation for Precision Monte Carlo Calculations of Fermion Pair Production: Precision Predictions for (Un)stable $W^{+}W^{-}$ Pairs (2000)

Ward, B F L, Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Was, Zbigniew

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- ->...

Two-Fermion Production in Electron-Positron Collisions (2000)

Kobel, M, Was, Zbigniew, Ainsley, C, Arbuzov, A, Arcelli, S, Bardin, Dimitri Yuri, ...

This report summarizes the results of the two-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the theoretical calculations of the two fermion...

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',...

Four-Fermion Production in Electron-Positron Collisions (2000)

Grünewald, M W, Passarino, G, Accomando, E, Ballestrero, A, Bambade, P, Bardin, Dimitri Yuri, ...

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...

Final State Radiative Effects for the Exact $O(\alpha)YFS$ Exponentiated (Un)Stable $W^{+}W^{-}$ Production At and Beyond LEP2 Energies (1999)

Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Ward, B F L, Was, Zbigniew

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...

Precision Calculation of Bhabha Scattering at LEP (1999)

Placzek, Wiesiek, Jadach, Stanislaw, Melles, M, Ward, B F L, Yost, S A

For the small-angle Bhabha-scattering process, we consider the error budget for the calculation of the LEP/SLC luminosity in the Monte Carlo event generator BHLUMI 4.04, from the standpoint of new...

Precision Calculations of Heavy Boson Production: YFS Monte Carlo Approach (1999)

Skrzypek, Maciej, Jadach, Stanislaw, Placzek, Wiesiek, Ward, B F L, Was, Zbigniew

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...

Gauge Invariant YFS Exponentiation of (Un)stable $Z$-Pair Production At and Beyond LEP2 Energies (1997)

Jadach, Stanislaw, Placzek, Wiesiek, Ward, B F L

We present the theoretical basis and sample Monte Carlo data for the YFS exponentiated calculation of $e^+e^- \to Z Z \to f_1\bar f_1 + \bar f_2 f_2$ at and beyond LEP2 energies, where the...

BHWIDE 1.00: O(alpha) YFS Exponentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1\/SLC and LEP2 (1996)

Jadach, Stanislaw, Placzek, Wiesiek, Ward, B F L

We present O(alpha) YFS exponentiated results for wide angle Bhabha scattering at LEP/SLC energies using a new Monte Carlo event generator BHWIDE 1.xx. Our calculations include two options for the...

BHWIDE 1.00: O(alpha) YFS Exponentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1\/SLC and LEP2 (1996)

Jadach, Stanislaw, Placzek, Wiesiek, Ward, B F L

We present O(alpha) YFS exponentiated results for wide angle Bhabha scattering at LEP/SLC energies using a new Monte Carlo event generator BHWIDE 1.xx. Our calculations include two options for the...

Gauge invariant YFS exponentiation of (un)stable W$^{+}$W$^{-}$ production at and beyond LEP2 energies (1996)

Jadach, Stanislaw, Placzek, Wiesiek, Skrzypek, Maciej, Ward, B F L

We present the theoretical basis and sample Monte Carlo data for the YFS exponentiated calculation of e^+e^- \rightarrow W^+ W^- \rightarrow f_1\bar f'_1 + \bar f_2 f'_2 at and beyond LEP2 energies,...