Results on elastic cross sections in proton–proton collisions at s=510 GeV with the STAR detector at RHIC
M. I. AbdulhamidAmerican University in Cairo, New Cairo 11835, EgyptB. E. AboonaTexas A&M University, College Station, Texas 77843J. AdamCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicL. AdamczykAGH University of Krakow, FPACS, Cracow 30-059, PolandJ. R. AdamsThe Ohio State University, Columbus, Ohio 43210I. AggarwalPanjab University, Chandigarh 160014, IndiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaE. C. AschenauerBrookhaven National Laboratory, Upton, New York 11973Saba AslamIndian Institute Technology, Patna, Bihar 801106, IndiaJ. AtchisonAbilene Christian University, Abilene, Texas 79699V. BairathiInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileJ. BallUniversity of Houston, Houston, Texas 77204K. N. BarishUniversity of California, Riverside, California 92521R. BellwiedUniversity of Houston, Houston, Texas 77204P. BhagatUniversity of Jammu, Jammu 180001, IndiaA. BhasinUniversity of Jammu, Jammu 180001, IndiaS. BhattaStony Brook UniversityS. BhosaleELTE Eötvös Loránd University, Budapest, H-1117, HungaryJ. BielčíkCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicJ. BielčíkováYale University , New Haven , Connecticut 06520J. D. BrandenburgThe Ohio State University, Columbus, Ohio 43210C. BroodoCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicX. Z. CaiShanghai Institute of Applied PhysicsH. CainesELTE Eötvös Loránd University, Budapest, H-1117, HungaryM. Calderón de la Barca SánchezIndian Institute Technology, Patna, Bihar 801106, IndiaD. CebraUniversity of Houston, Houston, Texas 77204J. CeskaINFN-Cosenza , Rende 87036 , ItalyI. ChakaberiaCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicP. ChaloupkaINFN-Cosenza , Rende 87036 , ItalyB. K. ChanUniversity of California , Los Angeles , California 90095Z. ChangIndiana University , Bloomington , Indiana 47408A. ChatterjeeNational Institute of Technology Durgapur , Durgapur - 713209 , IndiaD. ChenBrookhaven National Laboratory, Upton, New York 11973J. ChenShandong University , Qingdao , Shandong 266237J.H. ChenShandong University , Qingdao , Shandong 266237Z. ChenBrookhaven National Laboratory, Upton, New York 11973J. ChengCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicY. ChengAGH University of Krakow, FPACS, Cracow 30-059, PolandS. ChoudhuryELTE Eötvös Loránd University, Budapest, H-1117, HungaryW. ChristieBrookhaven National Laboratory , Upton , New York 11973X. ChuBrookhaven National Laboratory , Upton , New York 11973H. J. CrawfordUniversity of California , Berkeley , California 94720 iM. CsanádELTE Eötvös Loránd University , Budapest , H-1117 , HungaryG. Dale-GauUniversity of Illinois at Chicago , Chicago , Illinois 60607A. DasCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicI. M. DeppnerUniversity of Heidelberg, Heidelberg 69120, GermanyA. DhamijaPanjab University, Chandigarh 160014, IndiaP. DixitUniversity of Jammu, Jammu 180001, IndiaX. DongLawrence Berkeley National Laboratory, Berkeley, California 94720J. L. DrachenbergAbilene Christian University , Abilene , Texas 79699E. DuckworthINFN-Cosenza , Rende 87036 , ItalyJ. C. DunlopBrookhaven National Laboratory , Upton , New York 11973J. EngelageCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicG. EppleyUniversity of Jammu, Jammu 180001, IndiaS. EsumiINFN-Cosenza , Rende 87036 , ItalyO. EvdokimovELTE Eötvös Loránd University, Budapest, H-1117, HungaryO. EyserBrookhaven National Laboratory , Upton , New York 11973R. FatemiELTE Eötvös Loránd University, Budapest, H-1117, HungaryS. FazioELTE Eötvös Loránd University, Budapest, H-1117, HungaryC. FengPurdue University, West Lafayette, Indiana 47907Y. FengAGH University of KrakowE. FinchCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicY. FisyakAGH University of Krakow, FPACS, Cracow 30-059, PolandF. FlorWarsaw University of Technology, Warsaw 00-661, Poland 65 Wayne State University, Detroit, Michigan 48201 66 Wuhan University of Science and Technology, Wuhan, Hubei 430065 67 Yale University, New Haven, Connecticut 06520 andC. FuInstitute of Modern Physics , Chinese Academy of Sciences , Lanzhou , Gansu 730000C. A. GagliardiUniversity of Houston, Houston, Texas 77204T. GalatyukTechnische Universität Darmstadt , Darmstadt 64289 , GermanyT. GaoState University of New York, Stony Brook, New York 11794F. J. M. GeurtsRice University, Houston, Texas 77251N. GhimireUniversity of Jammu, Jammu 180001, IndiaS. M. GibsonVariable Energy Cyclotron Centre, Kolkata 700064, IndiaK. GopalCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicX. GouWarsaw University of Technology, Warsaw 00-661, Poland 65 Wayne State University, Detroit, Michigan 48201 66 Wuhan University of Science and Technology, Wuhan, Hubei 430065 67 Yale University, New Haven, Connecticut 06520 andD. GrosnickUniversity of California , Davis , California 95616A. GuptaUniversity of Jammu, Jammu 180001, IndiaW. GurynBrookhaven National Laboratory , Upton , New York 11973A. HamedBall State University, Muncie, Indiana, 47306Y. F. HanAGH University of KrakowS. HarabaszELTE Eötvös Loránd University, Budapest, H-1117, HungaryM. D. HarastyJ. W. HarrisUniversity of Kentucky, Lexington, Kentucky 40506-0055H. Harrison-SmithELTE Eötvös Loránd University, Budapest, H-1117, HungaryW. HeFudan University , Shanghai , 200433S. HeBrookhaven National Laboratory, Upton, New York 11973Y. HeBrookhaven National Laboratory, Upton, New York 11973N. HerrmannUniversity of Heidelberg , Heidelberg 69120 , GermanyL. HolubCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicC. HuUniversity of Chinese Academy of Sciences , Beijing , 101408 bi United StatesQ. Hu(STAR Collaboration)Y. HuAGH University of Krakow, FPACS, Cracow 30-059, PolandH. Z. HuangELTE Eötvös Loránd University, Budapest, H-1117, HungaryH. Z. HuangUniversity of California , Los Angeles , California 90095S. HuangState University of New York , Stony Brook , New York 11794T. HuangState University of New York, Stony Brook, New York 11794X. HuangTsinghua University, Beijing 100084Y. HuangAGH University of KrakowT. J. HumanicThe Ohio State University, Columbus, Ohio 43210M. IsshikiIndian Institute Technology, Patna, Bihar 801106, India
2024lv
ABI
Abstract
We report results on an elastic cross section measurement in proton–proton collisions at a center-of-mass energy s=510 GeV, obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section is measured in the four-momentum transfer squared range 0.23≤−t≤0.67 GeV2. This is the only measurement of the proton-proton elastic cross section in this t range for collision energies above the Intersecting Storage Rings (ISR) and below the Large Hadron Collider (LHC) colliders. We find that a constant slope B does not fit the data in the aforementioned t range, and we obtain a much better fit using a second-order polynomial for B(t). This is the first measurement below the LHC energies for which the non-constant behavior B(t) is observed. The t dependence of B is determined using six subintervals of t in the STAR measured t range, and is in good agreement with the phenomenological models. The measured elastic differential cross section dσ/dt agrees well with the results obtained at s=540 GeV for proton–antiproton collisions by the UA4 experiment. We also determine that the integrated elastic cross section within the STAR t-range is σelfid=462.1±0.9(stat.)±1.1(syst.)±11.6(scale) μb.
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