Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p↑ + p collisions at s=500 GeV
L. AdamczykAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. R. AdamsOhio State University, Columbus, OH 43210J. K. AdkinsUniversity of Kentucky, Lexington, KY 40506-0055G. AgakishievJoint Institute for Nuclear Research, Dubna, 141 980, RussiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaN. N. AjitanandStony Brook UniversityI. AlekseevNational Research Nuclear University MEPhI, Moscow 115409, RussiaD. M. AndersonTexas A&M University, College Station, TX 77843Y. G.University of Tsukuba, Tsukuba, Ibaraki, 305-8571, JapanA. AparinJoint Institute for Nuclear Research, Dubna, 141 980, RussiaD. ArkhipkinBrookhaven National Laboratory, Upton, NY 11973E. C. AschenauerBrookhaven National Laboratory, Upton, NY 11973M. U. AshrafTsinghua University, Beijing 100084A. AttriPanjab University, Chandigarh 160014, IndiaG. S. AverichevJoint Institute for Nuclear Research, Dubna, 141 980, RussiaV. BairathiNational Institute of Science Education and Research, HBNI, Jatni 752050, IndiaK. N. BarishUniversity of California, Riverside, CA 92521A. BeheraState University of New York, Stony Brook, NY 11794R. BellwiedUniversity of Houston, Houston, TX 77204A. BhasinUniversity of Jammu , Jammu 180001 , IndiaA. K. BhatiPanjab University , Chandigarh 160014 , IndiaP. BhattaraiCreighton University , Omaha , NE 68178J. BielčíkStony Brook UniversityJ. BielčíkováFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicL. C. BlandBrookhaven National Laboratory , Upton , NY 11973I. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics , Moscow 117218 , RussiaJ. BouchetState University of New York, Stony Brook, NY 11794J. D. BrandenburgRice University , Houston , TX 77251A. V. BrandinNational Research Nuclear University MEPhI , Moscow 115409 , RussiaD. S. BrownUniversity of Houston, Houston, TX 77204J. BryslawskyjStony Brook UniversityI. BunzarovUniversity of Houston, Houston, TX 77204J. M. ButterworthStony Brook UniversityH. CainesStony Brook UniversityM. Calderón de la Barca SánchezTsinghua University, Beijing 100084J. M. CampbellOhio State University, Columbus, Ohio 43210D. CebraUniversity of California , Davis , CA 95616I. ChakaberiaBrookhaven National Laboratory , Upton , NY 11973P. ChaloupkaBrookhaven National Laboratory, Upton, NY 11973Z. ChangVariable Energy Cyclotron Centre, Kolkata 700064, IndiaN. Chankova-BunzarovaJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaA. ChatterjeeVariable Energy Cyclotron Centre , Kolkata 700064 , IndiaS. ChattopadhyayVariable Energy Cyclotron Centre , Kolkata 700064 , IndiaC. H. ChengBrookhaven National Laboratory, Upton, NY 11973X. ChenInstitute of Modern Physics , Chinese Academy of Sciences , Lanzhou , Gansu 730000X. ChenInstitute of Modern Physics , Chinese Academy of Sciences , Lanzhou , Gansu 730000J. ChengStony Brook UniversityM. CherneyCreighton University , Omaha , NE 68178W. ChristieUniversity of Houston, Houston, TX 77204G. ContinLawrence Berkeley National Laboratory , Berkeley , CA 94720H. J. CrawfordUniversity of California , Berkeley , CA 94720Т. Г. ДедовичJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaJ. DengState University of New York, Stony Brook, NY 11794I.M. DeppnerCreighton University , Omaha , NE 68178A. A. DerevschikovInstitute of High Energy Physics, Protvino 142281, RussiaL. DidenkoUniversity of Houston, Houston, TX 77204C. DilksCreighton University , Omaha , NE 68178X. DongLawrence Berkeley National Laboratory , Berkeley , CA 94720J. L. DrachenbergLamar University , Physics Department , Beaumont , TX 77710J.E. DraperUniversity of California , Davis , CA 95616J.C. DunlopUniversity of California, Los Angeles, California 90095L.G. EfimovJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaN. ElseyBrookhaven National Laboratory, Upton, NY 11973J. EngelageUniversity of California, BerkeleyG. EppleyJoint Institute for Nuclear Research, Dubna, 141 980, RussiaR. EshaUniversity of Houston, Houston, TX 77204S. EsumisO. EvdokimovUniversity of Illinois at Chicago , Chicago , IL 60607 iJ. EwiglebenState University of New York, Stony Brook, NY 11794O. EyserUniversity of Tsukuba, Tsukuba, Ibaraki, 305-8571, JapanR. FatemiUniversity of Kentucky , Lexington , KY 40506-0055S. FazioBrookhaven National Laboratory , Upton , NY 11973P. FedericNuclear Physics Institute AS CR , 250 68 Prague , Czech RepublicP. FederičováBrookhaven National Laboratory, Upton, NY 11973J. FedorišinJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaZhao-Qing FengVariable Energy Cyclotron Centre, Kolkata 700064, IndiaP. FilipJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaE. FinchUniversity of Houston, Houston, TX 77204Y. FisyakBrookhaven National Laboratory , Upton , NY 11973C.E. FloresUniversity of Illinois at Chicago, Chicago, Illinois 60607J. FujitasŁ. FulekAGH University of Science and Technology , FPACS , Cracow 30-059 , PolandC. A. GagliardiBrookhaven National Laboratory, Upton, NY 11973F. J. M. GeurtsRice University , Houston , TX 77251S. M. GibsonValparaiso University , Valparaiso , IN 46383M. GirardTsinghua University, Beijing 100084D. GrosnickUniversity of Houston, Houston, TX 77204Duleeka Sandamali GunarathnesY. GuoKent State University , Kent , OH 44242A. GuptaUniversity of Jammu , Jammu 180001 , IndiaW. GurynBrookhaven National Laboratory , Upton , NY 11973A. I. HamadNational Institute of Science Education and Research, HBNI, Jatni 752050, IndiaA. HamedUniversity of Kentucky , Lexington , KY 40506-0055A. HarlenderovaCzech Technical University in Prague , FNSPE , Prague , 115 19 , Czech RepublicJ. W. HarrisYale University , New Haven , CT 06520L. HeState University of New York, Stony Brook, NY 11794S. HeppelmannUniversity of California, Riverside, CA 92521S. HeppelmannUniversity of California , Davis , CA 95616N. Herrmanns
2018lv
Ochiq kirishOlmos
Litsenziya: cc-by
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Annotatsiya
The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive deep inelastic scattering (SIDIS) data. In transversely polarized p ↑ + p collisions it can be accessed using transverse polarization dependent fragmentation functions which give rise to azimuthal correlations between the polarization of the struck parton and the final state scalar mesons. This letter reports on spin dependent di-hadron correlations measured by the STAR experiment. The new dataset corresponds to 25 pb −1 integrated luminosity of p ↑ + p collisions at s = 500 GeV, an increase of more than a factor of ten compared to our previous measurement at s = 200 GeV. Non-zero asymmetries sensitive to transversity are observed at a Q 2 of several hundred GeV and are found to be consistent with the former measurement and a model calculation. We expect that these data will enable an extraction of transversity with comparable precision to current SIDIS datasets but at much higher momentum transfers where subleading effects are suppressed.
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