Measurements of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:msup><mml:mi>γ</mml:mi><mml:mo>*</mml:mo></mml:msup></mml:math> cross sections and their ratios 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 RHIC
J. AdamBrookhaven National Laboratory, Upton, New York 11973L. AdamczykAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. R. AdamsOhio State University, Columbus, Ohio 43210J. K. AdkinsUniversity of Kentucky, Lexington, Kentucky 40506-0055G. AgakishievJoint Institute for Nuclear Research, Dubna 141 980, RussiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaI. AlekseevAlikhanov Institute for Theoretical and Experimental Physics NRC “Kurchatov Institute”, Moscow 117218, RussiaD. M. AndersonTexas A&M University, College Station, Texas 77843A. AparinJoint Institute for Nuclear Research, Dubna 141 980, RussiaE. C. AschenauerBrookhaven National Laboratory, Upton, New York 11973M. U. AshrafCentral China Normal University, Wuhan, Hubei 430079F. G. AtetallaKent State University, Kent, Ohio 44242A. AttriPanjab University, Chandigarh 160014, IndiaG. S. AverichevJoint Institute for Nuclear Research, Dubna 141 980, RussiaV. BairathiInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileK. N. BarishUniversity of California, Riverside, California 92521A. BeheraState University of New York, Stony Brook, New York 11794R. BellwiedUniversity of Houston, Houston, Texas 77204A. BhasinUniversity of Jammu, Jammu 180001, IndiaJ. BielčíkCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicJ. BielčíkováNuclear Physics Institute of the CAS, Rez 250 68, Czech RepublicL. C. BlandBrookhaven National Laboratory, Upton, New York 11973I. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics NRC “Kurchatov Institute”, Moscow 117218, RussiaJ. D. BrandenburgBrookhaven National Laboratory, Upton, New York 11973A. V. BrandinNational Research Nuclear University MEPhI, Moscow 115409, RussiaJ. M. ButterworthRice University, Houston, Texas 77251H. CainesYale University, New Haven, Connecticut 06520M. Calderón de la Barca SánchezUniversity of California, Davis, California 95616D. CebraUniversity of California, Davis, California 95616I. ChakaberiaBrookhaven National Laboratory, Upton, New York 11973P. ChaloupkaCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicB. K. ChanUniversity of California, Los Angeles, California 90095F-H. ChangNational Cheng Kung University, Tainan 70101Z. ChangBrookhaven National Laboratory, Upton, New York 11973N. Chankova-BunzarovaJoint Institute for Nuclear Research, Dubna 141 980, RussiaA. ChatterjeeCentral China Normal University, Wuhan, Hubei 430079D. ChenUniversity of California, Riverside, California 92521Jian ChenFudan University, Shanghai, 200433J. H. ChenFudan University, Shanghai, 200433X. ChenUniversity of Science and Technology of China, Hefei, Anhui 230026Z. ChenShandong University, Qingdao, Shandong 266237J. ChengTsinghua University, Beijing 100084M. CherneyCreighton University, Omaha, Nebraska 68178M. ChevalierUniversity of California, Riverside, California 92521S. ChoudhuryFudan University, Shanghai, 200433W. ChristieBrookhaven National Laboratory, Upton, New York 11973X. ChuBrookhaven National Laboratory, Upton, New York 11973H. J. CrawfordUniversity of California, Berkeley, California 94720M. CsanádELTE Eötvös Loránd University, Budapest, Hungary H-1117M. DaugherityAbilene Christian University, Abilene, Texas 79699T. G. DedovichJoint Institute for Nuclear Research, Dubna 141 980, RussiaI. M. DeppnerUniversity of Heidelberg, Heidelberg 69120, GermanyA. A. DerevschikovNRC “Kurchatov Institute”, Institute of High Energy Physics, Protvino 142281, RussiaL. DidenkoBrookhaven National Laboratory, Upton, New York 11973X. DongLawrence Berkeley National Laboratory, Berkeley, California 94720J. L. DrachenbergAbilene Christian University, Abilene, Texas 79699J. C. DunlopBrookhaven National Laboratory, Upton, New York 11973T. EdmondsPurdue University, West Lafayette, Indiana 47907N. ElseyWayne State University, Detroit, Michigan 48201J. EngelageUniversity of California, Berkeley, California 94720G. EppleyRice University, Houston, Texas 77251S. EsumiUniversity of Tsukuba, Tsukuba, Ibaraki 305-8571, JapanO. EvdokimovUniversity of Illinois at Chicago, Chicago, Illinois 60607A. EwiglebenLehigh University, Bethlehem, Pennsylvania 18015O. EyserBrookhaven National Laboratory, Upton, New York 11973R. FatemiUniversity of Kentucky, Lexington, Kentucky 40506-0055S. FazioBrookhaven National Laboratory, Upton, New York 11973P. FedericNuclear Physics Institute of the CAS, Rez 250 68, Czech RepublicJ. FedorišinJoint Institute for Nuclear Research, Dubna 141 980, RussiaC. FengNational Cheng Kung University, Tainan 70101Y. FengPurdue University, West Lafayette, Indiana 47907P. FilipJoint Institute for Nuclear Research, Dubna 141 980, RussiaE. FinchSouthern Connecticut State University, New Haven, Connecticut 06515Y. FisyakBrookhaven National Laboratory, Upton, New York 11973A. FranciscoYale University, New Haven, Connecticut 06520Ł. FulekAGH University of Science and Technology, FPACS, Cracow 30-059, PolandC. A. GagliardiTexas A&M University, College Station, Texas 77843T. GalatyukTechnische Universität Darmstadt, Darmstadt 64289, GermanyF. J. M. GeurtsRice University, Houston, Texas 77251S. M. GibsonValparaiso University, Valparaiso, Indiana 46383K. GopalIndian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, IndiaX. GouShandong University, Qingdao, Shandong 266237D. GrosnickValparaiso University, Valparaiso, Indiana 46383W. GurynBrookhaven National Laboratory, Upton, New York 11973A. I. HamadKent State University, Kent, Ohio 44242A. HamedAmerican University of Cairo, New Cairo 11835, New Cairo, EgyptS. HarabaszTechnische Universität Darmstadt, Darmstadt 64289, GermanyJ. W. HarrisYale University, New Haven, Connecticut 06520S. HeCentral China Normal University, Wuhan, Hubei 430079W. HeFudan University, Shanghai, 200433X. H. HeInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000Y. HeShandong University, Qingdao, Shandong 266237S. HeppelmannPennsylvania State University, University Park, Pennsylvania 16802S. HeppelmannPennsylvania State University, University Park, Pennsylvania 16802N. HerrmannUniversity of Heidelberg, Heidelberg 69120, GermanyEric A. HoffmanUniversity of Houston, Houston, Texas 77204L. HolubCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicY. HongLawrence Berkeley National Laboratory, Berkeley, California 94720S. HorvatYale University, New Haven, Connecticut 06520
2021lv
ABI
Аннотация
We report on the $W$ and $Z/{\ensuremath{\gamma}}^{*}$ differential and total cross sections as well as the ${W}^{+}/{W}^{\ensuremath{-}}$ and $({W}^{+}+{W}^{\ensuremath{-}})/(Z/{\ensuremath{\gamma}}^{*})$ cross section ratios measured by the STAR experiment at RHIC in $p+p$ collisions at $\sqrt{s}=500\text{ }\text{ }\mathrm{GeV}$ and 510 GeV. The cross sections and their ratios are sensitive to quark and antiquark parton distribution functions. In particular, at leading order, the $W$ cross section ratio is sensitive to the $\overline{d}/\overline{u}$ ratio. These measurements were taken at high ${Q}^{2}\ensuremath{\sim}{M}_{W}^{2},{M}_{Z}^{2}$ and can serve as input into global analyses to provide constraints on the sea quark distributions. The results presented here combine three STAR datasets from 2011, 2012, and 2013, accumulating an integrated luminosity of $350\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$. We also assess the expected impact that our ${W}^{+}/{W}^{\ensuremath{-}}$ cross section ratios will have on various quark distributions, and find sensitivity to the $\overline{u}\ensuremath{-}\overline{d}$ and $\overline{d}/\overline{u}$ distributions.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 2Использованных источников: 0