Physics Letters B (May 2024)

Results on elastic cross sections in proton–proton collisions at s=510 GeV with the STAR detector at RHIC

  • M.I. Abdulhamid,
  • B.E. Aboona,
  • J. Adam,
  • L. Adamczyk,
  • J.R. Adams,
  • I. Aggarwal,
  • M.M. Aggarwal,
  • Z. Ahammed,
  • E.C. Aschenauer,
  • S. Aslam,
  • J. Atchison,
  • V. Bairathi,
  • J.G. Ball Cap,
  • K. Barish,
  • R. Bellwied,
  • P. Bhagat,
  • A. Bhasin,
  • S. Bhatta,
  • S.R. Bhosale,
  • J. Bielcik,
  • J. Bielcikova,
  • J.D. Brandenburg,
  • C. Broodo,
  • X.Z. Cai,
  • H. Caines,
  • M. Calderón de la Barca Sánchez,
  • D. Cebra,
  • J. Ceska,
  • I. Chakaberia,
  • P. Chaloupka,
  • B.K. Chan,
  • Z. Chang,
  • A. Chatterjee,
  • D. Chen,
  • J. Chen,
  • J.H. Chen,
  • Z. Chen,
  • J. Cheng,
  • Y. Cheng,
  • S. Choudhury,
  • W. Christie,
  • X. Chu,
  • H.J. Crawford,
  • M. Csanád,
  • G. Dale-Gau,
  • A. Das,
  • I.M. Deppner,
  • A. Dhamija,
  • P. Dixit,
  • X. Dong,
  • J.L. Drachenberg,
  • E. Duckworth,
  • J.C. Dunlop,
  • J. Engelage,
  • G. Eppley,
  • S. Esumi,
  • O. Evdokimov,
  • O. Eyser,
  • R. Fatemi,
  • S. Fazio,
  • C.J. Feng,
  • Y. Feng,
  • E. Finch,
  • Y. Fisyak,
  • F.A. Flor,
  • C. Fu,
  • C.A. Gagliardi,
  • T. Galatyuk,
  • T. Gao,
  • F. Geurts,
  • N. Ghimire,
  • A. Gibson,
  • K. Gopal,
  • X. Gou,
  • D. Grosnick,
  • A. Gupta,
  • W. Guryn,
  • A. Hamed,
  • Y. Han,
  • S. Harabasz,
  • M.D. Harasty,
  • J.W. Harris,
  • H. Harrison-Smith,
  • W. He,
  • X.H. He,
  • Y. He,
  • N. Herrmann,
  • L. Holub,
  • C. Hu,
  • Q. Hu,
  • Y. Hu,
  • H. Huang,
  • H.Z. Huang,
  • S.L. Huang,
  • T. Huang,
  • X. Huang,
  • Y. Huang,
  • Y. Huang,
  • T.J. Humanic,
  • M. Isshiki,
  • W.W. Jacobs,
  • A. Jalotra,
  • C. Jena,
  • A. Jentsch,
  • Y. Ji,
  • J. Jia,
  • C. Jin,
  • X. Ju,
  • E.G. Judd,
  • S. Kabana,
  • D. Kalinkin,
  • K. Kang,
  • D. Kapukchyan,
  • K. Kauder,
  • D. Keane,
  • A. Khanal,
  • Y.V. Khyzhniak,
  • D.P. Kikoła,
  • D. Kincses,
  • I. Kisel,
  • A. Kiselev,
  • A.G. Knospe,
  • H.S. Ko,
  • L.K. Kosarzewski,
  • L. Kumar,
  • M.C. Labonte,
  • R. Lacey,
  • J.M. Landgraf,
  • J. Lauret,
  • A. Lebedev,
  • J.H. Lee,
  • Y.H. Leung,
  • N. Lewis,
  • C. Li,
  • D. Li,
  • H-S. Li,
  • H. Li,
  • W. Li,
  • X. Li,
  • Y. Li,
  • Y. Li,
  • Z. Li,
  • X. Liang,
  • Y. Liang,
  • R. Licenik,
  • T. Lin,
  • Y. Lin,
  • M.A. Lisa,
  • C. Liu,
  • G. Liu,
  • H. Liu,
  • L. Liu,
  • T. Liu,
  • X. Liu,
  • Y. Liu,
  • Z. Liu,
  • T. Ljubicic,
  • O. Lomicky,
  • R.S. Longacre,
  • E.M. Loyd,
  • T. Lu,
  • J. Luo,
  • X.F. Luo,
  • L. Ma,
  • R. Ma,
  • Y.G. Ma,
  • N. Magdy,
  • D. Mallick,
  • R. Manikandhan,
  • S. Margetis,
  • C. Markert,
  • H.S. Matis,
  • G. McNamara,
  • O. Mezhanska,
  • K. Mi,
  • S. Mioduszewski,
  • B. Mohanty,
  • M.M. Mondal,
  • I. Mooney,
  • M.I. Nagy,
  • A.S. Nain,
  • J.D. Nam,
  • M. Nasim,
  • D. Neff,
  • J.M. Nelson,
  • D.B. Nemes,
  • M. Nie,
  • G. Nigmatkulov,
  • T. Niida,
  • T. Nonaka,
  • G. Odyniec,
  • A. Ogawa,
  • S. Oh,
  • K. Okubo,
  • B.S. Page,
  • R. Pak,
  • S. Pal,
  • A. Pandav,
  • T. Pani,
  • A. Paul,
  • B. Pawlik,
  • D. Pawlowska,
  • C. Perkins,
  • J. Pluta,
  • B.R. Pokhrel,
  • M. Posik,
  • T. Protzman,
  • V. Prozorova,
  • N.K. Pruthi,
  • M. Przybycien,
  • J. Putschke,
  • Z. Qin,
  • H. Qiu,
  • C. Racz,
  • S.K. Radhakrishnan,
  • A. Rana,
  • R.L. Ray,
  • R. Reed,
  • H.G. Ritter,
  • C.W. Robertson,
  • M. Robotkova,
  • M.A. Rosales Aguilar,
  • D. Roy,
  • P. Roy Chowdhury,
  • L. Ruan,
  • A.K. Sahoo,
  • N.R. Sahoo,
  • H. Sako,
  • S. Salur,
  • S. Sato,
  • B.C. Schaefer,
  • W.B. Schmidke,
  • N. Schmitz,
  • F-J. Seck,
  • J. Seger,
  • R. Seto,
  • P. Seyboth,
  • N. Shah,
  • P.V. Shanmuganathan,
  • T. Shao,
  • M. Sharma,
  • N. Sharma,
  • R. Sharma,
  • S.R. Sharma,
  • A.I. Sheikh,
  • D. Shen,
  • D.Y. Shen,
  • K. Shen,
  • S.S. Shi,
  • Y. Shi,
  • Q.Y. Shou,
  • F. Si,
  • J. Singh,
  • S. Singha,
  • P. Sinha,
  • M.J. Skoby,
  • N. Smirnov,
  • Y. Söhngen,
  • Y. Song,
  • B. Srivastava,
  • T.D.S. Stanislaus,
  • M. Stefaniak,
  • D.J. Stewart,
  • B. Stringfellow,
  • Y. Su,
  • A.A.P. Suaide,
  • M. Sumbera,
  • C. Sun,
  • X. Sun,
  • Y. Sun,
  • Y. Sun,
  • B. Surrow,
  • Z.W. Sweger,
  • A.C. Tamis,
  • A.H. Tang,
  • Z. Tang,
  • T. Tarnowsky,
  • J.H. Thomas,
  • A.R. Timmins,
  • D. Tlusty,
  • T. Todoroki,
  • S. Trentalange,
  • P. Tribedy,
  • S.K. Tripathy,
  • T. Truhlar,
  • B.A. Trzeciak,
  • O.D. Tsai,
  • C.Y. Tsang,
  • Z. Tu,
  • J. Tyler,
  • T. Ullrich,
  • D.G. Underwood,
  • I. Upsal,
  • G. Van Buren,
  • J. Vanek,
  • I. Vassiliev,
  • V. Verkest,
  • F. Videbæk,
  • S.A. Voloshin,
  • F. Wang,
  • G. Wang,
  • J.S. Wang,
  • J. Wang,
  • K. Wang,
  • X. Wang,
  • Y. Wang,
  • Y. Wang,
  • Y. Wang,
  • Z. Wang,
  • J.C. Webb,
  • P.C. Weidenkaff,
  • G.D. Westfall,
  • D. Wielanek,
  • H. Wieman,
  • G. Wilks,
  • S.W. Wissink,
  • R. Witt,
  • J. Wu,
  • J. Wu,
  • X. Wu,
  • X. Wu,
  • B. Xi,
  • Z.G. Xiao,
  • G. Xie,
  • W. Xie,
  • H. Xu,
  • N. Xu,
  • Q.H. Xu,
  • Y. Xu,
  • Y. Xu,
  • Z. Xu,
  • Z. Xu,
  • G. Yan,
  • Z. Yan,
  • C. Yang,
  • Q. Yang,
  • S. Yang,
  • Y. Yang,
  • Z. Ye,
  • Z. Ye,
  • L. Yi,
  • K. Yip,
  • Y. Yu,
  • H. Zbroszczyk,
  • W. Zha,
  • C. Zhang,
  • D. Zhang,
  • J. Zhang,
  • S. Zhang,
  • W. Zhang,
  • X. Zhang,
  • Y. Zhang,
  • Y. Zhang,
  • Y. Zhang,
  • Y. Zhang,
  • Z.J. Zhang,
  • Z. Zhang,
  • Z. Zhang,
  • F. Zhao,
  • J. Zhao,
  • M. Zhao,
  • J. Zhou,
  • S. Zhou,
  • Y. Zhou,
  • X. Zhu,
  • M. Zurek,
  • M. Zyzak

Journal volume & issue
Vol. 852
p. 138601

Abstract

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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 also 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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