Beam-energy and system-size dependence of dynamical net charge fluctuations
B. I. AbelevUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaB. D. AndersonKent State University, Kent, Ohio 44242, USAD. ArkhipkinG. S. AverichevY. BaiNIKHEF and Utrecht University, Amsterdam, The NetherlandsJ. BalewskiMassachusetts Institute of Technology, Cambridge, MA 02139-4307, USAO. BarannikovaUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAL. S. BarnbyUniversity of Birmingham, Birmingham, United KingdomJ. BaudotS. BaumgartYale University, New Haven, Connecticut 06520, USAD. R. BeavisBrookhaven National Laboratory, Upton, New York 11973, USAR. BellwiedWayne State University, Detroit, Michigan 48201, USAF. BenedossoNIKHEF and Utrecht University, Amsterdam, The NetherlandsR. R. BettsUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAS. BhardwajUniversity of Rajasthan, Jaipur 302004, IndiaA. BhasinUniversity of Jammu, Jammu 180001, IndiaA. K. BhatiPanjab University, Chandigarh 160014, IndiaH. BichselUniversity of Washington, Seattle, Washington 98195, USAJ. BielčíkNuclear Physics Institute AS CR, 250 68 e/Prague, 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, USAM. BombaraUniversity of Birmingham, Birmingham, United KingdomB. E. BonnerRice University, Houston, Texas 77251, USAM. BotjeNIKHEF and Utrecht University, Amsterdam, The NetherlandsJ. BouchetKent State University, Kent, Ohio 44242, USAE. BraidotNIKHEF and Utrecht University, Amsterdam, The NetherlandsA. V. BrandinMoscow Engineering Physics Institute, Moscow, RussiaS. BueltmannOld Dominion University, Norfolk, VA, 23529, USAT. P. BurtonUniversity of Birmingham, Birmingham, United KingdomM. BysterskýNuclear Physics Institute AS CR, 250 68 e/Prague, Czech RepublicX. Z. CaiShanghai Institute of Applied Physics, Shanghai 201800, People's Republic of ChinaM. Calderon De La Barca SanchezUniversity of California, Davis, California 95616, USAJ. CallnerUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAO. CatuYale University, New Haven, Connecticut 06520, 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 e/Prague, Czech RepublicS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata 700064, IndiaH. F. ChenUniversity of Science & Technology of China, Hefei 230026, People's Republic of ChinaJ. H. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of ChinaJ. Y. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of ChinaJ. ChengTsinghua University, Beijing 100084, People's Republic of 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, USAS. U. ChungBrookhaven National Laboratory, Upton, New York 11973, USAR. F. ClarkeTexas A&M University, College Station, Texas 77843, USAM. J. M. CodringtonTexas A&M University, College Station, Texas 77843, USAJ. P. CoffinT. M. CormierWayne State University, Detroit, Michigan 48201, USAM. R. CosentinoUniversidade de Sao Paulo, Sao Paulo, BrazilJ. G. CramerUniversity of Washington, Seattle, Washington 98195, USAH. J. CrawfordUniversity of California, Berkeley, California 94720, USAD. DasUniversity of California, Davis, California 95616, USAS. DashInstitute of Physics, Bhubaneswar 751005, IndiaM. DaugherityUniversity of Texas, Austin, Texas 78712, USAM. M. de MoiraUniversidade de Sao Paulo, Sao Paulo, BrazilТ. Г. ДедовичM. DePhillipsBrookhaven National Laboratory, Upton, New York 11973, USAA. A. DerevschikovInstitute of High Energy Physics, Protvino, RussiaR. Derradi de SouzaUniversidade Estadual de Campinas, Sao Paulo, BrazilL. DidenkoBrookhaven National Laboratory, Upton, New York 11973, USAT. DictelBrookhaven 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, USAF. DuYale University, New Haven, Connecticut 06520, USAJ. C. DunlopBrookhaven National Laboratory, Upton, New York 11973, USAM. R. Dutta MazumdarVariable Energy Cyclotron Centre, Kolkata 700064, IndiaW. R. EdwardsLawrence Berkeley National Laboratory, Berkeley, California 94720, USAL. G. EfimovE. ElhalhuliUniversity of Birmingham, Birmingham, United KingdomM. ElnimrWayne State University, Detroit, Michigan 48201, USAВ. ЕмеляновMoscow Engineering Physics Institute, Moscow, RussiaJ. EngelageUniversity of California, Berkeley, California 94720, USAG. EppleyRice University, Houston, Texas 77251, USAB. ErazmusSUBATECH, Nantes, FranceM. EstienneL. EunPennsylvania State University, University Park, Pennsylvania 16802, USAP. FachiniBrookhaven National Laboratory, Upton, New York 11973, USAR. FatemiUniversity of Kentucky, Lexington, Kentucky, 40506-0055, USAJ. FedorišinA. FengInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of ChinaP. FilipE. 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, USAL. GaillardUniversity of Birmingham, Birmingham, United KingdomD. R. GangadharanUniversity of California, Los Angeles, California 90095, USAM. S. GantiVariable Energy Cyclotron Centre, Kolkata 700064, India
ABI
Аннотация
We present measurements of net charge fluctuations in Au + Au collisions at s NN = 19.6, 62.4, 130, and 200 GeV, Cu + Cu collisions at s NN = 62.4 and 200 GeV, and p + p collisions at s = 200 GeV using the dynamical net charge fluctuations measure +-,dyn . We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/N ch scaling but display approximate 1/N part scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity
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