High<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math>nonphotonic electron production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math>
H. AgakishievJoint Institute for Nuclear Research, Dubna, 141 980, RussiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedLawrence Berkeley National Laboratory, Berkeley, California 94720, USAA. V. AlakhverdyantsJoint Institute for Nuclear Research, Dubna, 141 980, RussiaI. AlekseevAlikhanov Institute for Theoretical and Experimental Physics, Moscow, RussiaJ. AlfordKent State University, Kent, Ohio 44242, USAB. D. AndersonKent State University, Kent, Ohio 44242, USAC. AnsonOhio State University, Columbus, Ohio 43210, USAD. ArkhipkinBrookhaven National Laboratory, Upton, New York 11973, USAG. S. AverichevJoint Institute for Nuclear Research, Dubna, 141 980, RussiaJ. BalewskiMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAD. R. BeavisBrookhaven National Laboratory, Upton, New York 11973, USAN. K. BeheraIndian Institute of Technology, Mumbai, IndiaR. BellwiedUniversity of Houston, Houston, Texas 77204, USAM. BetancourtMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAR. R. BettsUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAA. BhasinUniversity of Jammu, Jammu 180001, IndiaA. K. BhatiPanjab University, Chandigarh 160014, IndiaH. BichselUniversity of Washington, Seattle, Washington 98195, USAJ. BielčíkCzech Technical University in Prague, FNSPE, Prague, 115 19, Czech RepublicJ. BielčíkováNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicB. BiritzUniversity of California, Los Angeles, California 90095, USAL. C. BlandBrookhaven National Laboratory, Upton, New York 11973, USAI. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics, Moscow, RussiaW. BorowskiSUBATECH, Nantes, FranceJ. BouchetKent State University, Kent, Ohio 44242, USAE. BraidotNIKHEF and Utrecht University, Amsterdam, The NetherlandsA. V. BrandinMoscow Engineering Physics Institute, Moscow, RussiaA. BridgemanArgonne National Laboratory, Argonne, Illinois 60439, USAS. G. BrovkoUniversity of California, Davis, California 95616, USAE. BrunaYale University, New Haven, Connecticut 06520, USAS. BueltmannOld Dominion University, Norfolk, Virginia 23529, USAI. BunzarovJoint Institute for Nuclear Research, Dubna, 141 980, RussiaT. P. BurtonBrookhaven National Laboratory, Upton, New York 11973, USAX. Z. CaiShanghai Institute of Applied Physics, Shanghai 201800, ChinaH. CainesYale University, New Haven, Connecticut 06520, USAM. Calderón de la Barca SánchezUniversity of California, Davis, California 95616, USAD. CebraUniversity of California, Davis, California 95616, USAR. CendejasUniversity of California, Los Angeles, California 90095, USAM. C. CervantesTexas A&M University, College Station, Texas 77843, USAZ. ChajęckiOhio State University, Columbus, Ohio 43210, USAP. ChaloupkaNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata 700064, IndiaH. F. ChenUniversity of Science & Technology of China, Hefei 230026, ChinaJ. H. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, ChinaJ. Y. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, ChinaL. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, ChinaJ. ChengTsinghua University, Beijing 100084, ChinaM. CherneyCreighton University, Omaha, Nebraska 68178, USAA. ChikanianYale University, New Haven, Connecticut 06520, USAK. ChoiPusan National University, Pusan, Republic of KoreaW. ChristieBrookhaven National Laboratory, Upton, New York 11973, USAP. ChungNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicM. J. M. CodringtonTexas A&M University, College Station, Texas 77843, USAR. CorlissMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAJ. G. CramerUniversity of Washington, Seattle, Washington 98195, USAH. J. CrawfordUniversity of California, Berkeley, California 94720, USAS. DashInstitute of Physics, Bhubaneswar 751005, IndiaA. Davila LeyvaUniversity of Texas, Austin, Texas 78712, USAL. C. De SilvaUniversity of Houston, Houston, Texas 77204, USAR. R. DebbeBrookhaven National Laboratory, Upton, New York 11973, USAT. G. DedovichJoint Institute for Nuclear Research, Dubna, 141 980, RussiaA. A. DerevschikovInstitute of High Energy Physics, Protvino, RussiaR. Derradi de SouzaUniversidade Estadual de Campinas, Sao Paulo, BrazilL. DidenkoBrookhaven National Laboratory, Upton, New York 11973, USAP. DjawothoTexas A&M University, College Station, Texas 77843, USAS. DograUniversity of Jammu, Jammu 180001, IndiaX. DongLawrence Berkeley National Laboratory, Berkeley, California 94720, USAJ. L. DrachenbergTexas A&M University, College Station, Texas 77843, USAJ. E. DraperUniversity of California, Davis, California 95616, USAJ. C. DunlopBrookhaven National Laboratory, Upton, New York 11973, USAL. G. EfimovJoint Institute for Nuclear Research, Dubna, 141 980, RussiaM. ElnimrWayne State University, Detroit, Michigan 48201, USAJ. EngelageUniversity of California, Berkeley, California 94720, USAG. EppleyRice University, Houston, Texas 77251, USAM. EstienneSUBATECH, Nantes, FranceL. EunPennsylvania State University, University Park, Pennsylvania 16802, USAO. EvdokimovUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAR. FatemiUniversity of Kentucky, Lexington, Kentucky 40506-0055, USAJ. FedorišinJoint Institute for Nuclear Research, Dubna, 141 980, RussiaR. G. FerschUniversity of Kentucky, Lexington, Kentucky 40506-0055, USAP. FilipJoint Institute for Nuclear Research, Dubna, 141 980, RussiaE. FinchYale University, New Haven, Connecticut 06520, USAV. FineBrookhaven National Laboratory, Upton, New York 11973, USAY. FisyakBrookhaven National Laboratory, Upton, New York 11973, USAC. A. GagliardiTexas A&M University, College Station, Texas 77843, USAD. R. GangadharanUniversity of California, Los Angeles, California 90095, USAA. GeromitsosSUBATECH, Nantes, FranceF. J. M. GeurtsRice University, Houston, Texas 77251, USAP. GhoshVariable Energy Cyclotron Centre, Kolkata 700064, IndiaY. N. GorbunovCreighton University, Omaha, Nebraska 68178, USAA. GordonBrookhaven National Laboratory, Upton, New York 11973, USAO. G. GrebenyukLawrence Berkeley National Laboratory, Berkeley, California 94720, USAD. GrosnickValparaiso University, Valparaiso, Indiana 46383, USAS. M. GuertinUniversity of California, Los Angeles, California 90095, USAA. GuptaUniversity of Jammu, Jammu 180001, IndiaW. GurynBrookhaven National Laboratory, Upton, New York 11973, USAB. HaagUniversity of California, Davis, California 95616, USAO. HajkovaCzech Technical University in Prague, FNSPE, Prague, 115 19, Czech RepublicA. HamedTexas A&M University, College Station, Texas 77843, USA
2011lv
ABI
Аннотация
We present the measurement of nonphotonic electron production at high transverse momentum (${p}_{T}>2.5\text{ }\text{ }\mathrm{GeV}/c$) in $p+p$ collisions at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ using data recorded during 2005 and 2008 by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The measured cross sections from the two runs are consistent with each other despite a large difference in photonic background levels due to different detector configurations. We compare the measured nonphotonic electron cross sections with previously published RHIC data and perturbative quantum chromodynamics calculations. Using the relative contributions of B and D mesons to nonphotonic electrons, we determine the integrated cross sections of electrons ($\frac{{e}^{+}+{e}^{\ensuremath{-}}}{2}$) at $3\text{ }\text{ }\mathrm{GeV}/c<{p}_{T}<10\text{ }\text{ }\mathrm{GeV}/c$ from bottom and charm meson decays to be $[(d{\ensuremath{\sigma}}_{(B\ensuremath{\rightarrow}e)+(B\ensuremath{\rightarrow}D\ensuremath{\rightarrow}e)})/(d{y}_{e}){]}_{{y}_{e}=0}=4.0\ifmmode\pm\else\textpm\fi{}0.5(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}1.1(\mathrm{syst})\text{ }\text{ }\mathrm{nb}$ and $[(d{\ensuremath{\sigma}}_{D\ensuremath{\rightarrow}e})/(d{y}_{e}){]}_{{y}_{e}=0}=6.2\ifmmode\pm\else\textpm\fi{}0.7(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}1.5(\mathrm{syst})\text{ }\text{ }\mathrm{nb}$, respectively.
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