Results on total and elastic cross sections in proton–proton collisions at [formula omitted] GeV

K. Yip,W. Zha,Y. Wang,S. Huang ,A. Hamed,T. D. S. Stanislaus ,S. Jowzaee,Y. H. Leung ,Sanjeev Kumar ,H. Liu,W. Q. Shen ,T. Edmonds,P. C. Weidenkaff ,D. Keane,E. C. Aschenauer ,P. Wang,Eric A. Hoffman ,P. Seyboth,C. A. Tomkiel ,G. Van Buren,A. Kiselev,S. Trentalange,W. B. Schmidke ,R. Licenik,O. Eyser,Xiao Zhang ,B. Kimelman,Y. Feng,M. A. Lisa ,P. Filip,N. Smirnov,F. G. Atetalla ,R. Fatemi,T. Huang,A. Taranenko,J. Jia,N. Schmitz,Z. Zhang,X. M. Sun ,S. Margetis,V. Bairathi,J. Adam,A. Behera,A. Gibson,Y. Zhang,G. Odyniec,C. Zhang,L. Kumar,Yugang Ma ,H. Sako,R. Reed,A. Pandav,M. Kelsey,K. Kang,S. Zhang,J. Bielčíková ,N. Kulathunga Mudiyanselage,D. Zhang,A. V. Brandin ,J. L. Romero ,D. Kincses,T. A. Kinghorn ,Susumu Sato ,I. G. Bordyuzhin ,M. Zyzak,W. Solyst,Z. Chen,X. Huang,S. K. Radhakrishnan ,R. Bellwied,K. Gopal,I. Vassiliev,L. Yi,M. U. Ashraf ,M. Strikhanov,H. S. Matis ,G. Xie,J. Porter,J. M. Nelson ,Y. Li,J.H. Lee,B. Mohanty,L. Holub,O. V. Rogachevskiy ,R. Ma,J. C. Webb ,J. Fedorišin ,M. Stefaniak,E. Shahaliev,F. Shen,J. R. Adams ,G. Agakishiev,Y. Liang,Md. Nasim,G. Eppley,G. S. Averichev ,A. Ogawa,C. Li,L. Didenko,L. V. Nogach ,C. A. Gagliardi ,C. Zhou,W. J. Llope ,H. Zbroszczyk,A. Aparin,B. K. Chan ,I. Chakaberia,O. Evdokimov,H. Wieman,Q. Yang,B. Surrow,N. Shah,D. Kalinkin,J. Seger,Y. Wu,S. Vokál ,M. Sergeeva,J. Bielčík ,C. Jena,Z. Chang,M. Przybycień ,S. A. Voloshin ,Yifan Hong ,Y. Liu,A. H. Tang ,B. Summa,W. Christie,X. Chu,S. Luo,X.P. Zhang,D. Cebra,D. N. Svirida ,C. Feng ,R. Sikora,D. B. Nemes ,I. Kisel,J. Zhao,N. Elsey,M. Chevalier,L. Wen,Y. Ji,A. Lebedev,G. D. Westfall ,D. Chen,H. Pei,T. Nonaka,P. Tribedy,K. Krueger,Z. H. Zhu ,L. Kochenda,Z. Ahammed,J. Rusňák ,F. Liu,P. Federic,S. Kagamaster,D. M. Anderson ,Q. Shou ,D. Tlusty,Z.J. Zhang,S. Yang,W. Xie,S. Harabasz,H. W. Ke ,J. H. Kwasizur ,L. Ruan,B. R. Schweid ,R. Seto,Ł. Fulek ,J. K. Adkins ,W. Guryn,S. W. Wissink ,C. Yang,J. Lauret,M. Posik,C. Markert,R. L. Pintér ,P. V. Shanmuganathan ,Dukhishyam Mallick ,X. Liu,Raghav Kunnawalkam Elayavalli ,X. Ju,T. Ljubičić ,I. M. Deppner ,J. Cheng,N. Sahoo ,N. S. Lukow ,A. Francisco,R. L. Ray ,M. I. Nagy ,E. P. Sichtermann ,Z. Moravcová ,X. Zhu,D. Pawłowska ,A. Quintero,J.S. Wang,A. Jentsch,D. Isenhower,Y. Lin,R. Lednický ,M. Tokarev,Y. J. Sun ,X. Luo,B. S. Page ,J. D. Brandenburg ,K. Kauder,M. Shao,R. Majka,P. Chaloupka,H. G. Ritter ,S. Esumi,N. Chankova-Bunzarova,T. Galatyuk,J. C. Dunlop ,Z. Wang,Z. Yang,H. Xu,L. Pinsky,A. Attri,W. Li,D. P. Kikoła ,L. K. Kosarzewski ,P. Szymański ,I. Mooney,S. K. Tripathy ,A. S. Nunes ,H. M. Spinka ,R. Witt,J. Mazer ,W. W. Jacobs ,A. Vasiliev ,J. Vaněk ,G. Wang,M. Calderón de la Barca Sánchez,X. He ,F. Seck,C. Kim,L. Ma,M. Šumbera ,R. Pak,C. Perkins,T. H. Lin ,S. Bueltmann,S. Lan,S. Salur,M. Nie,S. B. Oh ,M. Csanád,J. D. Nam ,Y. Fisyak,Yi Yang ,N. Herrmann,T. Ullrich,David J. Stewart ,A. Bhasin,D. Grosnick,S. Choudhury,J. Engelage,Guoliang Ma ,H. J. Crawford ,D. Kapukchyan,J. Sandweiss,S. Ramachandran,F. Videbæk,T. Tarnowsky,M. Daugherity,A. Ewigleben,S. Heppelmann,M. L. Kabir ,Z. Ye,G. Igo,N. Xu,H. Caines,Z. Xu,E. G. Judd ,J. H. Thomas ,I. Alekseev,S. He,M. Kocan,L. C. Bland ,A. I. Hamad ,A. Kechechyan,R. E. Tribble ,M. Simko,Z. Tu,Q. H. Xu ,P. Huo,T. Niida,J.H. Chen,B. Stringfellow,J. M. Landgraf ,S. Singha,N. K. Pruthi ,H. Z. Huang ,I. Upsal,J. W. Harris ,Z. Tang,П. Кравцов ,X. Sun,S. Horvat,S. Kabana,T. G. Dedovich ,P. Sorensen,F. J. M. Geurts ,Y. Hu,T. Liu,R. S. Longacre ,J. B. Singh ,N. Magdy,G. Nigmatkulov,F-H. Chang,Y. Xu,H. Qiu,X. Dong,Y. Panebratsev,D. Neff,X. Chen,A. R. Timmins ,J. Putschke,L. Kramárik ,Vitaly Okorokov ,R. Lacey,M. Cherney,E. Finch,M. Żurek ,W. He,O. D. Tsai ,B. Pawlik,J. Pluta,S. S. Shi ,X. Li,S. Fazio,N. G. Minaev ,J. Butterworth,Д. А. Морозов ,F. Wang,A. Chatterjee,J. L. Drachenberg ,D. G. Underwood ,Zhong Chen ,K. Nayak,Z. Liu,P. Liu,S. Mioduszewski,K. Jiang,M. M. Aggarwal ,T. J. Humanic ,A. I. Sheikh ,K. N. Barish ,Alexandre Alarcon Do Passo Suaide ,B. Srivastava,A. A. Derevschikov ,L. Adamczyk,Y. V. Khyzhniak

doi:10.1016/j.physletb.2020.135663

Abstract

We report results on the total and elastic cross sections in proton-proton collisions at s=200 GeV obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section was measured in the squared four-momentum transfer range 0.045≤−t≤0.135 GeV2. The value of the exponential slope parameter B of the elastic differential cross section dσ/dt∼e−Bt in the measured −t range was found to be B=14.32±0.09(stat.)−0.28+0.13(syst.) GeV−2. The total cross section σtot, obtained from extrapolation of the dσ/dt to the optical point at −t=0, is σtot=54.67±0.21(stat.)−1.38+1.28(syst.) mb. We also present the values of the elastic cross section σel=10.85±0.03(stat.)−0.41+0.49(syst.) mb, the elastic cross section integrated within the STAR t-range σeldet=4.05±0.01(stat.)−0.17+0.18(syst.) mb, and the inelastic cross section σinel=43.82±0.21(stat.)−1.44+1.37(syst.) mb. The results are compared with the world data.

Highlights

Elastic scattering plays an important role in proton-proton scattering at high energies, as evidenced by the fact that it contributes about 20% of the total cross section at the highest Large Hadron Collider (LHC) energies [1]
√ We report results on the total and elastic cross sections in proton-proton collisions at s = 200 GeV obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC)
We present the values of the elastic cross section σel = 10.85 ± 0.03(stat.)+−00..4491(syst.) mb, the elastic cross section integrated within the STAR t-range σedlet = 4.05 ± 0.01(stat.)+−00..1187(syst.) mb, and the inelastic cross section σinel = 43.82 ± 0.21(stat.)+−11..3474(syst.) mb

Summary

Introduction

Elastic scattering plays an important role in proton-proton (pp) scattering at high energies, as evidenced by the fact that it contributes about 20% of the total cross section at the highest Large Hadron Collider (LHC) energies [1]. The pp elastic and total cross sections have √been measured at colliders with center of mass energies 2.76 ≤ s ≤ 13 T√eV at the LHC [1] and at the Intersecting Storage Rings (ISR) at s = 62.4 GeV [2] It is important, to have measurements in the energy gap between the ISR and the LHC to constrain the phenomenological models of the pp cross sections since one still expects a difference between pp and proton-antiproton (p p ) cross section√s within the RHIC energy range. Both the values of the cross sections and the difference between pp and p paffect phenomenological models [9,10,11,12,13,14]

The experiment

Alignment and track reconstruction

Clustering

Alignment

Scattering angle and t reconstruction

Data analysis

Fiducial volume GEO cut

Simulation and correction factors

Results

Ji100 oi 80

Summary