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We present a Monte Carlo code dedicated to the simulation of bremsstrahlung arising in collisions of polarized electrons with thin target foils. The program consists of an electron transport algorithm taking into account elastic…

Atomic Physics · Physics 2015-06-05 G. Weber , R. Märtin , A. Surzhykov , M. Yasuda , V. A. Yerokhin , Th. Stöhlker

Polarization characteristics of the gamma beam obtained by the Compton back scattering of laser photons on high energy electrons are evaluated by Monte-Carlo simulations. It is assumed that outgoing photons are tagged; the energy dispersion…

Instrumentation and Detectors · Physics 2007-05-23 A. S. Omelaenko , Yu. P. Peresunko , Yu. M. Ranyuk , I. M. Shapoval , V. G. Nedorezov

We re-examine the possibility to measure the photon polarization in $B \to K^*\gamma$ decays, via decays in which the photon subsequently undergoes nuclear conversion to a lepton pair. We obtain compact expressions for the full…

High Energy Physics - Phenomenology · Physics 2015-07-07 Fady Bishara , Dean J. Robinson

The quark spin effects are introduced for the first time in the string fragmentation routine of the Pythia 8 Monte Carlo event generator for the simulation of $e^+e^-$ annihilation to hadrons. To describe the spin effects the…

High Energy Physics - Phenomenology · Physics 2023-12-29 A. Kerbizi , L. Lönnblad , A. Martin

We extend to the special case of Bhabha scattering the "Z-peak subtracted" representation previously applied to e+e- to f f(bar) (f different from e). This allows us to analyze the process at any energy while imposing in an automatic way…

High Energy Physics - Phenomenology · Physics 2009-10-31 M. Beccaria , F. M. Renard , S. Spagnolo , C. Verzegnassi

We investigate the possibility of observing strong interactions of longitudinally polarized weak vector bosons in the process $\gamma \gamma \to ZZ$ at a photon linear collider. We make use of polarization of the photon beams and cuts on…

High Energy Physics - Phenomenology · Physics 2014-11-17 M. S. Berger , M. S. Chanowitz

The Monte Carlo generator EKHARA allows to simulate the process (e+e- to e+e-pi0) at energies of meson factories. We review the motivation, describe the current status of the generator, and discuss features, which will appear in the…

High Energy Physics - Phenomenology · Physics 2015-06-04 Henryk Czyz , Sergiy Ivashyn

The results of Monte-Carlo simulations of electron-positron-photon cascades initiated by slow electrons in circularly polarized fields of ultra-high strength are presented and discussed. Our results confirm previous qualitative estimations…

High Energy Physics - Phenomenology · Physics 2011-05-23 N. V. Elkina , A. M. Fedotov , I. Yu. Kostyukov , M. V. Legkov , N. B. Narozhny , E. N. Nerush , H. Ruhl

We study the electron and phonon thermalization in simple metals excited by a laser pulse. The thermalization is investigated numerically by solving the Boltzmann transport equation taking into account all the relevant scattering mechanism:…

Materials Science · Physics 2018-02-28 Shota Ono

The electron-neutrino bremsstrahlung process has been considered in the framework of electro-weak theory. The scattering cross section has been calculated in the center of mass frame and approximated to extreme relativistic as well as…

High Energy Physics - Phenomenology · Physics 2007-05-23 Indranath Bhattacharyya

The transverse polarization of a quark is a degree of freedom that is not taken into account in the most commonly used Monte Carlo generators. For the case "e^+e^- -> hadrons" I show that it is possible to use these generators to simulate…

High Energy Physics - Phenomenology · Physics 2011-09-06 Andrea Bianconi

The spin effect of electrons/positrons ($e^-$/$e^+$) and polarization effect of $\gamma$ photons are investigated in the interaction of two counter-propagating linearly polarized 10-PW-class laser pulses with a thin foil target. The…

We calculate the cross sections for the production of Higgs particles in association with a photon in $e^+ e^-$ collisions, $e^+ e^- \to \gamma+$Higgs, allowing for the longitudinal polarization of the initial electron and positron beams.…

High Energy Physics - Phenomenology · Physics 2016-09-06 A. Djouadi , V. Driesen , W. Hollik , J. Rosiek

Motivated by the future precision test of the Higgs boson at an $e^+e^-$ Higgs factory, we calculate the production $e^+e^- \to ZH\gamma$ in the Standard Model with complete next-to-leading order electroweak corrections. We find that for…

High Energy Physics - Phenomenology · Physics 2015-06-18 Ning Liu , Jie Ren , Lei Wu , Peiwen Wu , Jin Min Yang

We study the process $e^+ e^- \to \gamma \gamma \nu \bar{\nu}$ in the context of a strong electroweak symmetry breaking model, which can be a source of events with two photons and missing energy at LEP2. We investigate bounds on the model…

High Energy Physics - Phenomenology · Physics 2011-08-17 Alfonso R. Zerwekh , Rogerio Rosenfeld

Monte Carlo simulations are performed to study the in-plane transport of spin-polarized electrons in III-V semiconductor quantum wells. The density matrix description of the spin polarization is incorporated in the simulation algorithm. The…

Mesoscale and Nanoscale Physics · Physics 2010-09-22 Min Shen , Semion Saikin , Ming-C. Cheng , Vladimir Privman

Primary gamma rays emitted by extragalactic sources, such as blazars, will generate electromagnetic cascades in intergalactic space. These cascades proceed via electron-positron pair production and inverse Compton scattering on cosmic…

High Energy Astrophysical Phenomena · Physics 2011-09-14 H. Huan , T. Weisgarber

The radiation emission spectra of polarized photons emitted from charge particle in single crystal are obtained in semiclassical theory in Baer-Katkov-Strakhovenko approximation for planar crystal orientation. The range of applicability of…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. M. Darbinian , N. L. Ter-Isaakian

We study photon echo generation in disordered media with the help of multiple scattering theory based on diagrammatic approach and numerical simulations. We show that a strong correlation exists between the driving fields at the origin of…

Optics · Physics 2018-06-20 Romain Pierrat , Rémi Carminati , Jean-Louis Le Gouët

In this paper we analyze the effects of virtual vector bileptons in polarized Bhabha scattering at the energies of the future linear colliders. In order to make the calculations of the differential cross sections more realistic, important…

High Energy Physics - Phenomenology · Physics 2009-08-11 B. Meirose , A. J. Ramalho