Invariant Jet Mass Measurements in $pp$ Collisions at $\sqrt{s} = 200$ GeV at RHIC

M. S. Abdallah,J. Adam,Leszek Adamczyk,J R Adams,J. K. Adkins,G. Agakishiev,I. Aggarwal,Madan M. Aggarwal,Zubayer Ahammed,I. G. Alekseev,Dustin Anderson,A. Aparin,E. C. Aschenauer,Muhammad Usman Ashraf,Fareha Atetalla,Anjali Attri,G. S. Averichev,Vipul Bairathi,W Baker,J. G. Ball Cap,K. N. Barish,Arabinda Behera,R. Bellwied,P. Bhagat,Anju Bhasin,Jaroslav Bielcik,Jana Bielcikova,Igor Bordyuzhin,J. D. Brandenburg,A. V. Brandin,I. Bunzarov,J. Butterworth,Xiao Cai,H. Caines,M. Calderon De La Barca Sanchez,D. Cebra,I. Chakaberia,P. Chaloupka,Brian Chan,F H Chang,Z. Chang,Nedialka Chankova-Bunzarova,Arka Chatterjee,S. Chattopadhyay,D. Chen,J.H. Chen,Jinhui Chen,X C Chen,Z. Chen,J. Cheng,M Chevalier,S. Choudhury,W. Christie,X. Chu,H. J. Crawford,M. Csanad,M. S. Daugherity,T. G. Dedovich,Ingo Deppner,A. A. Derevschikov,A. Dhamija,L. Di Carlo,L. Didenko,X. Dong,J. L. Drachenberg,J. C. Dunlop,Nicholas Elsey,J. Engelage,G. Eppley,Shinichi Esumi,O. Evdokimov,A. Ewigleben,O. Eyser,R. Fatemi,F. M. Fawzi,S. Fazio,P. Federic,J. Fedorisin,C.J. Feng,Yicheng Feng,P. Filip,E. Finch,Y. Fisyak,Audrey Francisco,C. Fu,L. Fulek,C. A. Gagliardi,T. Galatyuk,F.J.M. Geurts,N Ghimire,A. Gibson,K. Gopal,X. Gou,D. Grosnick,A. Gupta,W. Guryn,A. I. Hamad,A. Hamed,Y. Han,S. Harabasz,M. D. Harasty,J. W. Harris,H. Harrison,S He,W. He,X. H. He,Y. He,S. Heppelmann,N. Herrmann,E. Hoffman,Lukáš Holub,Y. Hu,H. Z. Huang,H. Z. Huang,Shengli Huang,Te-Chuan Huang,X. Huang,Y. Huang,T. J. Humanic,D. Isenhower,W. W. Jacobs,Chitrasen Jena,Alexander Jentsch,Y. Ji,Jiangyong Jia,K. Jiang,Xinyue Ju,E. G. Judd,S. Kabana,M. L. Kabir,Skipper Kagamaster,Dmitry Kalinkin,Kejun Kang,David Kapukchyan,K. Kauder,Hongwei Ke,D. Keane,A. Kechechyan,Y. V. Khyzhniak,Daniel Kikola,Chong Kim,B. Kimelman,Dániel Kincses,Ivan Kisel,A. Kiselev,A. G. Knospe,L. Kochenda,Leszek Kosarzewski,Lukas Kramarik,P. Kravtsov,Lokesh Kumar,S. Kumar,R. Kunnawalkam Elayavalli,Joseph Kwasizur,R. Lacey,S. Lan,J. M. Landgraf,J. Lauret,A. Lebedev,R. Lednický,J.H. Lee,Y H Leung,C Li,W. D. Li,Xuemei Li,Y. Li,X Liang,Ying Liang,R Licenik,Ting-lin,Y. Lin,M. A. Lisa,F. Liu,H. Liu,P. Liu,T. Liu,Xiaoyu Liu,Y Liu,Zhen Liu,T. Ljubicic,W. J. Llope,R. S. Longacre,E. Loyd,N. S. Lukow,Xi-Wang Luo,Lan Ma,R Ma,Y. G. Ma,N Magdy,R. Majka,Dukhishyam Mallick,S. Margetis,Christina Markert,H. S. Matis,Joel Anthony Mazer,N. G. Minaev,S. Mioduszewski,B. Mohanty,Mriganka Mouli Mondal,Isaac Mooney,D. A. Morozov,A. Mukherjee,Marton Imre Nagy,J. D. Nam,Md. Nasim,Kishora Nayak,D. Neff,J. M. Nelson,Daniel Nemes,Maowu Nie,G. Nigmatkulov,Takafumi Niida,R. Nishitani,L. V. Nogach,T. Nonaka,A.S. Nunes,G. Odyniec,A. Ogawa,S. H. Oh,V. A. Okorokov,B. S. Page,R. Pak,A. Pandav,A. K. Pandey,Y. Panebratsev,P. Parfenov,B. Pawlik,D. Pawlowska,Hua Pei,C. Perkins,L.S. Pinsky,Roland Laszlo Pinter,J. Pluta,B. R. Pokhrel,G. Ponimatkin,Jeff Porter,M. Posik,V. Prozorova,N. K. Pruthi,Mariusz Przybycien,J. Putschke,H. Qiu,A. Quintero,C. Racz,Sooraj Krishnan Radhakrishnan,N. Raha,Rajarshi Ray,Robert Reed,H. G. Ritter,M. Robotkova,O. V. Rogachevskiy,J. L. Romero,L. Ruan,J. Rusnak,N R Sahoo,Hiroyuki Sako,S. Salur,J. Sandweiss,Susumu Sato,W. B. Schmidke,N. Schmitz,Benjamin Schweid,Florian Seck,Janet Elizabeth Seger,Maria Sergeeva,R. Seto,P. Seyboth,Nilay Shah,E. Shahaliev,Prashanth Shanmuganathan,M. Shao,T Shao,Ashik Ikbal Sheikh,D Shen,S. S. Shi,Y. Shi,Qiye Shou,E. P. Sichtermann,Rafał Sikora,Miroslav Simko,J. B. Singh,S. Singha,M.J. Skoby,Nikolai Smirnov,Y. Söhngen,William Solyst,P. Sorensen,H. M. Spinka,B. K. Srivastava,T. D. S. Stanislaus,M Stefaniak,David Stewart,M. Strikhanov,B. Stringfellow,A. A. P. Suaide,Michal Šumbera,Branden Summa,X. M. Sun,Xiangming Sun,Y. J. Sun,Bernd Surrow,D.N. Svirida,Z.W. Sweger,Paweł Szymański,A. H. Tang,Zebo Tang,A. Taranenko,T. Tarnowsky,J. H. Thomas,A. R. Timmins,D. Tlusty,T. Todoroki,M. Tokarev,Catherine Tomkiel,S. Trentalange,R. E. Tribble,Prithwish Tribedy,S. K. Tripathy,T. Truhlar,B. A. Trzeciak,O. D. Tsai,Z. Tu,T. Ullrich,D. G. Underwood,I. Upsal,G. Van Buren,Jan Vanĕk,Alexander N. Vasiliev,I. Vassiliev,V Verkest,F. Videbaek,S. Vokal,Sergey Voloshin,F. Wang,G Wang,J.-S. Wang,Pengdong Wang,Y. Wang,Z. Wang,J. C. Webb,P. C. Weidenkaff,Liwen Wen,G. D. Westfall,H.H. Wieman,S. W. Wissink,R. Witt,J. Wu,Y. F. Wu,B. Xi,Zhigang Xiao,Guannan Xie,Wei Xie,H. S. Xu,Nu Xu,Q. H. Xu,Y. F. Xu,Z.Z. Xu,C. Yang,Qian Yang,Youhua Yang,Z. Ye,Li Yi,K. Yip,Y. Yu,Hanna Paulina Zbroszczyk,W. Zha,C. C. Zhang,D Zhang,S.Q. Zhang,X. P. Zhang,Y Zhang,Z.J. Zhang,Z. Y. Zhang,Jize Zhao,C. Zhou,Xiaofeng Zhu,Zhanwen Zhu,Maria Zurek,M. Zyzak

Invariant Jet Mass Measurements in $pp$ Collisions at $\sqrt{s} = 200$ GeV at RHIC

2021

We present the first inclusive measurements of the invariant and SoftDrop jet mass in proton-proton collisions at $\sqrt{s}=200$ GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tuned PYTHIA-6 reproduces the data, while LHC tunes of PYTHIA-8 and HERWIG-7 do not agree with the data, providing further constraints on parameter tuning. Finally, we observe that SoftDrop grooming, for which the contribution of wide-angle non-perturbative radiation is suppressed, shifts the jet mass distributions into closer agreement with the partonic jet mass as determined by both PYTHIA-8 and a next-to-leading-logarithmic accuracy perturbative QCD calculation. These measurements complement recent LHC measurements in a different kinematic region, as well as establish a baseline for future jet mass measurements in heavy-ion collisions at RHIC.

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