Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01 (2007)
Aguilar, M., Alcaraz, J., Allaby, J., Alpat, B., Ambrosi, G., Anderhub, H., ...
A measurement of the cosmic ray positron fraction $e^{+}/(e^{+}+e^{−})$ in the energy range of 130 GeV is presented. The measurement is based on data taken by the AMS-01 experiment during its...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
Measurements of inclusive production of the Lambda, Xi- and Xi*(1530) baryons in two-photon collisions with the L3 detector at LEP are presented. The inclusive differential cross sections for Lambda...
The solar flare of the 14th of July 2000 : L3+C detector results (2007)
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
Aims.Several experiments have reported observations on possible correlations between the flux of high energy muons and intense solar flares. If confirmed, these observations would have significant...
The solar flare of the 14th of July 2000 : L3+C detector results (2007)
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
Aims.Several experiments have reported observations on possible correlations between the flux of high energy muons and intense solar flares. If confirmed, these observations would have significant...
The solar flare of the 14th of July 2000 : L3+C detector results (2007)
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
Aims.Several experiments have reported observations on possible correlations between the flux of high energy muons and intense solar flares. If confirmed, these observations would have significant...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
Measurements of inclusive production of the Lambda, Xi(-) and Xi*(1530) baryons in two-photon collisions with the L3 detector at LEP are presented. The inclusive differential cross sections for...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
Measurements of inclusive production of the Lambda, Xi(-) and Xi*(1530) baryons in two-photon collisions with the L3 detector at LEP are presented. The inclusive differential cross sections for...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
The (KSK +/-)-K-0 pi(-/+) final state in two-photon collisions is studied with the L3 detector at LEP at e(+)e(-) centre- of- mass energies from 183 to 209 GeV with an integrated luminosity of 664.6...
Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01 (2007)
Aguilar, M., Alcaraz, J., Allaby, J., Alpat, B., Ambrosi, G., Anderhub, H., ...
Measurement of Hadron and Lepton-Pair Production at 130 GeV $ \sqrt{s} $ 189 GeV at LEP (2006)
Acciarri, M., Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
We report on measurements of $\mathrm{e^{+}e^{-}}$ annihilation into hadronsand lepton pairs.The data have been collected with the L3 detector at LEP at centre-of-massenergies between 130 and...
Formation of the $\eta_c$ in Two-Photon Collisions at LEP (2006)
Acciarri, M., Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
The two-photon width $\Gamma_{\gamma\gamma}$ of the $\eta_{\mathrm{c}}$ meson has been measured with the L3 detector at LEP. The $\eta_{\mathrm{c}}$ is studied in the decay modes...
Measurement of an elongation of the pion source in Z decays (2006)
Acciarri, M., Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
We measure Bose-Einstein correlations between like-sign charged pion pairs in hadronic Z~decays with the L3 detector at LEP. The analysis is performed in three dimensions in the longitudinal...
Measurement of the mass and the width of the W boson at LEP (2006)
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
The mass and the total decay width of the W boson are measured with the L3 detector at the LEP e+e- collider using W-boson pairs produced in 0.7/fb of data collected at centre-of-mass energies...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
The L3+C muon detector at the CERN electron-positron collider, LEP, is used for the detection of very-high-energy cosmic gamma-ray sources through the observation of muons of energies above 20, 30,...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., ...
The L3+C muon detector at the CERN electron-positron collider, LEP, is used for the detection of very-high-energy cosmic gamma-ray sources through the observation of muons of energies above 20, 30,...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
The reactions gamma gamma -> pi(+)pi(-)pi(+)pi(-) and gamma gamma -> pi(+)pi(0)pi(-)pi(0) are studied with the L3 detector at LEP in a data sample collected at centre-of-mass energies from 161 GeV to...
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
Hadron production and lepton-pair production in e(+)e(-) collisions are studied with data collected with the L3 detector at LEP at centre-of-mass energies root s = 192-208 GeV. Using a total...
Measurement of the mass and the width of the W boson at LEP (2006)
Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...
The mass and the total decay width of the W boson are measured with the L3 detector at the LEP e(+)e(-) collider using W-boson pairs produced in 0.7 fb(-1) of data collected at centre-of-mass...
Search for neutral MSSM Higgs bosons at LEP (2006)
Schael, S., Barate, R., Bruneliere, R., De Bonis, I., Decamp, D., Goy, C., ...
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric standard model (MSSM). The data of the four...
A Study of cosmic ray secondaries induced by the Mir Space Station using AMS-01 (2005)
Aguilar, M., Alcaraz, J., Allaby, J., Alpat, B., Ambrosi, G., Anderhub, H., ...
The Alpha Magnetic Spectrometer (AMS-02) is a high energy particle physics experiment that will study cosmic rays in the $\sim 100 \mathrm{MeV}$ to $1 \mathrm{TeV}$ range and will be installed on the...
Measurement of Radiative Bhabha and Quasi-Real Compton Scattering (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on a study of radiative Bhabha and quasi-real Compton scattering at centre-of-mass energies between 50~{\GeV} and 170~{\GeV} and 20~{\GeV} and 140~{\GeV}, respectively, using the L3...
Measurement of Radiative Bhabha and Quasi-Real Compton Scattering (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on a study of radiative Bhabha and quasi-real Compton scattering at centre-of-mass energies between 50~{\GeV} and 170~{\GeV} and 20~{\GeV} and 140~{\GeV}, respectively, using the L3...
Measurement of Radiative Bhabha and Quasi-Real Compton Scattering (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on a study of radiative Bhabha and quasi-real Compton scattering at centre-of-mass energies between 50~{\GeV} and 170~{\GeV} and 20~{\GeV} and 140~{\GeV}, respectively, using the L3...
Measurement of muon-pair production at 50 GeV $\sqrt{s}$ 86 GeV at LEP (2005)
Acciarri, M., Adam, A., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., ...
B$^\star$ production in Z decays at LEP (2005)
Acciarri, M., Adam, A., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., ...
B$^\star$ production in Z decays at LEP (2005)
Acciarri, M., Adam, A., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., ...
Measurement of muon-pair production at 50 GeV $\sqrt{s}$ 86 GeV at LEP (2005)
Acciarri, M., Adam, A., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., ...
B$^\star$ production in Z decays at LEP (2005)
Acciarri, M., Adam, A., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., ...
Measurement of muon-pair production at 50 GeV $\sqrt{s}$ 86 GeV at LEP (2005)
Acciarri, M., Adam, A., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., ...
Measurement of the anomalous magnetic and electric dipole moments of the $\tau$ lepton (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
Measurement of the Weak Dipole Moments of the $\tau$ Lepton (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
Using the data collected by the L3 experiment at LEP from 1991 to 1995 at energies around the $\Zo$ mass, a measurement of the weak anomalous magnetic dipole moment, $a^w_{\tau}$,~ and of the weak...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
The coupling of the Z boson to quarks is studied in a sample of about 3.5 million hadronic Z decays collected by the L3 experiment at LEP from 1991 to 1995. The forward-backward quark charge asymmet...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
A measurement of the inclusive charmless semileptonic branching fraction of beauty hadrons, $\mathrm{b}\rightarrow\mathrm{X}_\mathrm{u }\ell\nu$, has been performed using almost two million hadronic...
Search for New Physics Phenomena in Fermion-Pair Production at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
The measurements of hadron and lepton--pair production cross sections and lepton--pair forward--backward asymmetries performed with the L3 detector at centre--of--mass energies between 130 GeV and...
Determination of the Number of Light Neutrino Species from Single Photon Production at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
A determination of the number of light neutrino families performed by measuring the cross section of single photon production in \ee\ collision near the \Zo\ resonance is reported. From an integrated...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
Four of the Michel parameters and the average tau-neutrino helicity have been measured by analysing tau decay spectra in 147 \pb ~of data collected by the L3 detector. The decays \tte, ~\ttm, ~\ttp,...
Measurement of the Average Lifetime of b-Hadrons in Z Decays (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We present a measurement of the average b-hadron lifetime ${\rm \tau_b}$ at the $\mathrm{e^+e^-} \, $ collider LEP. Using hadronic Z decays collected in the period from 1991 to 1994, two independent...
Study of hadronic events and measurements of $\alpha_{s}$ between 30 and 91 GeV (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We have studied the structure of hadronic events with a hard, %radiated isolated photon in the final state ($\mathrm{e^{+}e^{-}} \rightarrow$ Z $\rightarrow$ hadrons $+$ $\gamma$) in the 3.6 million...
Inclusive J, $\psi$' and $\chi_c$ Production in Hadronic Z Decays (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on measurements of the inclusive production of J, $\psi'$ and $\mathrm{\chi_c}$ mesons in hadronic Z decays, based on 3.2 million hadronic events collected using the L3 detector at LEP. The...
Study of the Weak Charged Hadronic Current in b Decays (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
Charged and neutral particle multiplicities of jets associated with identified semileptonic and hadronic b decays are studied. The observed differences between these jets are used to determine the...
Measurement of Inclusive $\omega$ and $\eta$' Production in Hadronic Z Decays (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
We present a study of the inclusive $\omega$ and $\eta^{\prime}$ production based on 3.1 million hadronic Z decays recorded with the L3 detector at LEP during 1991--1994. The production rates per...
Search for Exclusive B Decays to J and $\eta$ or $\pi^{0}$ with the L3 Detector (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
A search for exclusive decays of $\ensuremath{\mathrm{B_d^0}}$ and $\ensuremath{\mathrm{B_s^0}}$ mesons has been performed in the channels $\ensuremath{\mathrm{B_d^0}\rightarrow\mathrm{J}\eta}$,\,\,...
Search for Neutral B Meson Decays to Two Charged Leptons (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
The decays $\mathrm{B_d^0,\,B_s^0 \rightarrow e^+e^-,\,\mu^+\mu^-,\, e^\pm\mu^\mp}$ are searched for in 3.5 million hadronic ${\mathrm{Z}}$ events, which constitute the full LEP I data sample...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
Using a data sample of 1,475,000 $\ZQQG$ events collected during 1994 with the L3 detector at LEP, we have studied the purely leptonic decays of heavy flavour mesons, $\Dtau$ and $\Btau$. A signal is...
Search for R-Parity Breaking Sneutrino Exchange at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on a search for R--parity breaking effects due to supersymmetric tau--sneutrino exchange in the reactions e+e- to e+e- and e+e- to mu+mu- at centre--of--mass energies from 91~{\GeV} to...
Production of Single W Bosons at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
We report on the observation of single W boson production in a data sample collected by the L3 detector at LEP2. The signal consists of large missing energy final states with a single energetic...
Search for Excited Leptons in $e^+ e^-$ Annihilation at $\sqrt{s}$ = 161 GeV (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
A search for excited leptons $\rm e^*,~\mu^*, ~\tau^*$ and $\nu_{\rm e}^*$ in $\rm e^+e^-$ collisions at $\rm \sqrt{s}$ = 161 GeV is performed using the $\rm 10.8 ~pb^{-1}$ of data collected by the...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We present a study of the structure of hadronic events recorded by the L3 detector at LEP at the center of mass energies of 161 and 172 GeV. The data sample corresponds to an integrated luminosity of...
$K^{0}_{S}$ and $\Lambda$ production in quark and gluon jets at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
A measurement of the $\mathrm{K^0_s}$ and $\Lambda$ inclusive production rates and momentum spectra in two- and three-jet events is presented. On the basis of about 3.1~million Z decays collected...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons has been made at center-of-mass energies $\sqrt{s}$ = 161 GeV and $\sqrt{s}$ = 172 GeV with the L3...
Search for anomalous four-jet events in $e^+e^-$ annihilation at $\sqrt{s}$ = 130-172 GeV (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
A study of hadronic events with high jet-multiplicity is performed using the data sample collected by the L3 experiment at LEP at $\sqrt{s}=130-172$ GeV. The observed event rates agree with the...
Pair-Production of W Bosons in $e^+ e^-$ Interactions at $\sqrt{s}$ = 161 GeV (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alpat, B., Alcaraz, J., ...
We report on the measurement of W-boson pair-production with the L3 detector at LEP at a centre-of-mass energy of 161.34~\GeV. In a data sample corresponding to a total luminosity of 11~pb$^{-1}$, we...
Resonance formation in the $\pi^+\pi^-\pi^0$ final state in two-photon collisions (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
A study of resonance formation is presented in the $\pi^+\pi^-\pi^0$ final state in two-photon collisions at LEP. The $a_2(1320)$ radiative width is measured to be...
Measurements of Mass, Width and Gauge Couplings of the W Boson at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on measurements of mass and total decay width of the W boson and of triple-gauge-boson couplings, $\gamma$WW and ZWW, with the L3 detector at LEP. W-pair events produced in $\EE$...
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13~GeV. In a data sample corresponding to a total luminosity of...
Production of e, $\mu$ and $\tau$ Pairs in Untagged Two-Photon Collisions at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
The two-photon collision reaction e+e- --> e+e-l+l- has been studied at root(s) ~ 91 GeV using the L3 detector at LEP for l = e, muon , tau. We have analysed untagged configurations where the two...
Measurement of hadron and lepton pair production at 161 GeV $\sqrt{s}$ 172 GeV at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
We report on measurements of $\mathrm{e^+e^-}$ annihilation into hadrons and lepton pairs. The data have been taken with the L3 detector at LEP at centre--of--mass energies between...
Cross Section of Hadron Production in $\gamma \gamma$ collisions at LEP (2005)
Acciarri, M., Adriani, O., Aguilar-Benitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., ...
The reaction $\mathrm{e}^{+} \mathrm{e}^{-} \rightarrow \mathrm{e}^{+} \mathrm{e}^{-} \gamma ^{*} \gamma ^{*} \rightarrow \mathrm{e}^{+} \mathrm{e}^{-} $ {\sl hadrons} is analysed using data...