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Title: Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC

Abstract

We discuss kinematical correlations between charged leptons from semileptonic decays of open charm/bottom leptons produced in the Drell-Yan mechanism as well as some other mechanisms not included so far in the literature in proton-proton scattering at Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider (RHIC). The distributions of charm and bottom quarks/antiquarks are calculated in the framework of the k{sub t}-factorization approach. For this calculation we use different unintegrated parton distributions from the literature. The hadronization of heavy quarks is done with the help of well-known fragmentation functions. Uncertainties of our predictions related to heavy quark masses, factorization, and renormalization scales as well as due to the choice of fragmentation model are also discussed. We use semileptonic decay functions found by fitting recent semileptonic data obtained by the CLEO and BABAR collaborations. The Drell-Yan processes were calculated including transverse momenta of quarks and antiquarks, using the Kwiecinski parton distributions. We have also taken into consideration reactions initiated by purely QED {gamma}{sup *{gamma}*} fusion in elastic and inelastic pp collisions as well as a recently proposed diffractive mechanism of exclusive charm-anticharm production. The contribution of the latter mechanism is rather small. We get a good description of the dilepton invariant massmore » spectrum measured recently by the PHENIX Collaboration and present predictions for the dilepton pair transverse momentum distribution as well as the distribution in the azimuthal angle between electron and positron.« less

Authors:
;  [1];  [1]
  1. Institute of Nuclear Physics PAN, PL-31-342 Cracow (Poland)
Publication Date:
OSTI Identifier:
21578190
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.83.054014; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTIQUARKS; B QUARKS; BNL; BROOKHAVEN RHIC; C QUARKS; DISTRIBUTION; DRELL MODEL; ELECTRONS; MESONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; POSITRONS; PROTON-PROTON INTERACTIONS; QUANTUM ELECTRODYNAMICS; SEMILEPTONIC DECAY; T QUARKS; TRANSVERSE MOMENTUM; ACCELERATORS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARYON-BARYON INTERACTIONS; BEAUTY PARTICLES; BOSONS; CHARM PARTICLES; DECAY; ELECTRODYNAMICS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; HEAVY ION ACCELERATORS; INTERACTIONS; LEPTONS; LINEAR MOMENTUM; MATTER; MEASURING INSTRUMENTS; NATIONAL ORGANIZATIONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE DECAY; PARTICLE INTERACTIONS; POSTULATED PARTICLES; PROTON-NUCLEON INTERACTIONS; QUANTUM FIELD THEORY; QUARKS; SPECTROMETERS; STORAGE RINGS; TOP PARTICLES; US AEC; US DOE; US ERDA; US ORGANIZATIONS; WEAK PARTICLE DECAY

Citation Formats

Maciula, R, Slipek, G, Szczurek, A, and University of Rzeszow, PL-35-959 Rzeszow. Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.83.054014.
Maciula, R, Slipek, G, Szczurek, A, & University of Rzeszow, PL-35-959 Rzeszow. Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC. United States. https://doi.org/10.1103/PHYSREVD.83.054014
Maciula, R, Slipek, G, Szczurek, A, and University of Rzeszow, PL-35-959 Rzeszow. 2011. "Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC". United States. https://doi.org/10.1103/PHYSREVD.83.054014.
@article{osti_21578190,
title = {Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC},
author = {Maciula, R and Slipek, G and Szczurek, A and University of Rzeszow, PL-35-959 Rzeszow},
abstractNote = {We discuss kinematical correlations between charged leptons from semileptonic decays of open charm/bottom leptons produced in the Drell-Yan mechanism as well as some other mechanisms not included so far in the literature in proton-proton scattering at Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider (RHIC). The distributions of charm and bottom quarks/antiquarks are calculated in the framework of the k{sub t}-factorization approach. For this calculation we use different unintegrated parton distributions from the literature. The hadronization of heavy quarks is done with the help of well-known fragmentation functions. Uncertainties of our predictions related to heavy quark masses, factorization, and renormalization scales as well as due to the choice of fragmentation model are also discussed. We use semileptonic decay functions found by fitting recent semileptonic data obtained by the CLEO and BABAR collaborations. The Drell-Yan processes were calculated including transverse momenta of quarks and antiquarks, using the Kwiecinski parton distributions. We have also taken into consideration reactions initiated by purely QED {gamma}{sup *{gamma}*} fusion in elastic and inelastic pp collisions as well as a recently proposed diffractive mechanism of exclusive charm-anticharm production. The contribution of the latter mechanism is rather small. We get a good description of the dilepton invariant mass spectrum measured recently by the PHENIX Collaboration and present predictions for the dilepton pair transverse momentum distribution as well as the distribution in the azimuthal angle between electron and positron.},
doi = {10.1103/PHYSREVD.83.054014},
url = {https://www.osti.gov/biblio/21578190}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 5,
volume = 83,
place = {United States},
year = {2011},
month = {3}
}