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Phys Rev Lett. 2017 Aug 11;119(6):062301. doi: 10.1103/PhysRevLett.119.062301. Epub 2017 Aug 10.

Dijet imbalance measurements in Au+Au and pp collisions at sqrt[s_{NN}]=200  GeV at STAR.

Physical review letters

L Adamczyk, J K Adkins, G Agakishiev, M M Aggarwal, Z Ahammed, I Alekseev, D M Anderson, R Aoyama, A Aparin, D Arkhipkin, E C Aschenauer, M U Ashraf, A Attri, G S Averichev, X Bai, V Bairathi, R Bellwied, A Bhasin, A K Bhati, P Bhattarai, J Bielcik, J Bielcikova, L C Bland, I G Bordyuzhin, J Bouchet, J D Brandenburg, A V Brandin, D Brown, I Bunzarov, J Butterworth, H Caines, M Calderón de la Barca Sánchez, J M Campbell, D Cebra, I Chakaberia, P Chaloupka, Z Chang, A Chatterjee, S Chattopadhyay, J H Chen, X Chen, J Cheng, M Cherney, W Christie, G Contin, H J Crawford, S Das, L C De Silva, R R Debbe, T G Dedovich, J Deng, A A Derevschikov, L Didenko, C Dilks, X Dong, J L Drachenberg, J E Draper, C M Du, L E Dunkelberger, J C Dunlop, L G Efimov, N Elsey, J Engelage, G Eppley, R Esha, S Esumi, O Evdokimov, J Ewigleben, O Eyser, R Fatemi, S Fazio, P Federic, J Fedorisin, Z Feng, P Filip, E Finch, Y Fisyak, C E Flores, L Fulek, C A Gagliardi, D Garand, F Geurts, A Gibson, M Girard, L Greiner, D Grosnick, D S Gunarathne, Y Guo, A Gupta, S Gupta, W Guryn, A I Hamad, A Hamed, R Haque, J W Harris, L He, S Heppelmann, S Heppelmann, A Hirsch, G W Hoffmann, S Horvat, X Huang, B Huang, H Z Huang, T Huang, P Huck, T J Humanic, G Igo, W W Jacobs, A Jentsch, J Jia, K Jiang, S Jowzaee, E G Judd, S Kabana, D Kalinkin, K Kang, K Kauder, H W Ke, D Keane, A Kechechyan, Z Khan, D P Kikoła, I Kisel, A Kisiel, L Kochenda, D D Koetke, L K Kosarzewski, A F Kraishan, P Kravtsov, K Krueger, L Kumar, M A C Lamont, J M Landgraf, K D Landry, J Lauret, A Lebedev, R Lednicky, J H Lee, W Li, X Li, X Li, Y Li, C Li, T Lin, M A Lisa, Y Liu, F Liu, T Ljubicic, W J Llope, M Lomnitz, R S Longacre, X Luo, S Luo, G L Ma, L Ma, R Ma, Y G Ma, N Magdy, R Majka, A Manion, S Margetis, C Markert, H S Matis, D McDonald, S McKinzie, K Meehan, J C Mei, Z W Miller, N G Minaev, S Mioduszewski, D Mishra, B Mohanty, M M Mondal, D A Morozov, M K Mustafa, Md Nasim, T K Nayak, G Nigmatkulov, T Niida, L V Nogach, T Nonaka, J Novak, S B Nurushev, G Odyniec, A Ogawa, K Oh, V A Okorokov, D Olvitt, B S Page, R Pak, Y X Pan, Y Pandit, Y Panebratsev, B Pawlik, H Pei, C Perkins, P Pile, J Pluta, K Poniatowska, J Porter, M Posik, A M Poskanzer, N K Pruthi, M Przybycien, J Putschke, H Qiu, A Quintero, S Ramachandran, R L Ray, R Reed, M J Rehbein, H G Ritter, J B Roberts, O V Rogachevskiy, J L Romero, J D Roth, L Ruan, J Rusnak, O Rusnakova, N R Sahoo, P K Sahu, I Sakrejda, S Salur, J Sandweiss, J Schambach, R P Scharenberg, A M Schmah, W B Schmidke, N Schmitz, J Seger, P Seyboth, N Shah, E Shahaliev, P V Shanmuganathan, M Shao, M K Sharma, A Sharma, B Sharma, W Q Shen, S S Shi, Z Shi, Q Y Shou, E P Sichtermann, R Sikora, M Simko, S Singha, M J Skoby, D Smirnov, N Smirnov, W Solyst, L Song, P Sorensen, H M Spinka, B Srivastava, T D S Stanislaus, M Stepanov, R Stock, M Strikhanov, B Stringfellow, T Sugiura, M Sumbera, B Summa, X M Sun, Z Sun, Y Sun, B Surrow, D N Svirida, Z Tang, A H Tang, T Tarnowsky, A Tawfik, J Thäder, J H Thomas, A R Timmins, D Tlusty, T Todoroki, M Tokarev, S Trentalange, R E Tribble, P Tribedy, S K Tripathy, O D Tsai, T Ullrich, D G Underwood, I Upsal, G Van Buren, G van Nieuwenhuizen, A N Vasiliev, R Vertesi, F Videbæk, S Vokal, S A Voloshin, A Vossen, F Wang, J S Wang, G Wang, Y Wang, Y Wang, G Webb, J C Webb, L Wen, G D Westfall, H Wieman, S W Wissink, R Witt, Y Wu, Z G Xiao, G Xie, W Xie, K Xin, Q H Xu, H Xu, Y F Xu, Z Xu, J Xu, N Xu, S Yang, Q Yang, Y Yang, C Yang, Y Yang, Y Yang, Z Ye, Z Ye, L Yi, K Yip, I-K Yoo, N Yu, H Zbroszczyk, W Zha, X P Zhang, J Zhang, J Zhang, Z Zhang, S Zhang, J B Zhang, Y Zhang, S Zhang, J Zhao, C Zhong, L Zhou, X Zhu, Y Zoulkarneeva, M Zyzak,

Affiliations

  1. AGH University of Science and Technology, FPACS, Cracow 30-059, Poland.
  2. University of Kentucky, Lexington, Kentucky 40506-0055.
  3. Joint Institute for Nuclear Research, Dubna 141 980, Russia.
  4. Panjab University, Chandigarh 160014, India.
  5. Variable Energy Cyclotron Centre, Kolkata 700064, India.
  6. Alikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, Russia.
  7. National Research Nuclear University MEPhI, Moscow 115409, Russia.
  8. Texas A&M University, College Station, Texas 77843.
  9. Brookhaven National Laboratory, Upton, New York 11973.
  10. Tsinghua University, Beijing 100084.
  11. Central China Normal University, Wuhan, Hubei 430079.
  12. National Institute of Science Education and Research, Bhubaneswar 751005, India.
  13. University of Houston, Houston, Texas 77204.
  14. University of Jammu, Jammu 180001, India.
  15. University of Texas, Austin, Texas 78712.
  16. Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
  17. Nuclear Physics Institute AS CR, 250 68 Prague, Czech Republic.
  18. Kent State University, Kent, Ohio 44242.
  19. Rice University, Houston, Texas 77251.
  20. Lehigh University, Bethlehem, Pennsylvania 18015.
  21. Yale University, New Haven, Connecticut 06520.
  22. University of California, Davis, California 95616.
  23. The Ohio State University, Columbus, Ohio 43210.
  24. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800.
  25. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000.
  26. Creighton University, Omaha, Nebraska 68178.
  27. Lawrence Berkeley National Laboratory, Berkeley, California 94720.
  28. University of California, Berkeley, California 94720.
  29. Institute of Physics, Bhubaneswar 751005, India.
  30. Shandong University, Jinan, Shandong 250100.
  31. Institute of High Energy Physics, Protvino 142281, Russia.
  32. Pennsylvania State University, University Park, Pennsylvania 16802.
  33. Lamar University, Physics Department, Beaumont, Texas 77710.
  34. University of California, Los Angeles, California 90095.
  35. Wayne State University, Detroit, Michigan 48201.
  36. University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
  37. University of Illinois at Chicago, Chicago, Illinois 60607.
  38. Southern Connecticut State University, New Haven, Connecticut 06515.
  39. Purdue University, West Lafayette, Indiana 47907.
  40. Valparaiso University, Valparaiso, Indiana 46383.
  41. Warsaw University of Technology, Warsaw 00-661, Poland.
  42. Temple University, Philadelphia, Pennsylvania 19122.
  43. University of Science and Technology of China, Hefei, Anhui 230026.
  44. National Cheng Kung University, Tainan 70101.
  45. Indiana University, Bloomington, Indiana 47408.
  46. State University Of New York, Stony Brook, New York 11794.
  47. Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
  48. Argonne National Laboratory, Argonne, Illinois 60439.
  49. Michigan State University, East Lansing, Michigan 48824.
  50. Pusan National University, Pusan 46241, Korea.
  51. Institute of Nuclear Physics PAN, Cracow 31-342, Poland.
  52. Lehigh University, Bethlehem, Pennsylvnia 18015.
  53. Max-Planck-Institut fur Physik, Munich 80805, Germany.
  54. World Laboratory for Cosmology and Particle Physics (WLCAPP), Cairo 11571, Egypt.
  55. United States Naval Academy, Annapolis, Maryland 21402.

PMID: 28949601 DOI: 10.1103/PhysRevLett.119.062301

Abstract

We report the first dijet transverse momentum asymmetry measurements from Au+Au and pp collisions at RHIC. The two highest-energy back-to-back jets reconstructed from fragments with transverse momenta above 2  GeV/c display a significantly higher momentum imbalance in heavy-ion collisions than in the pp reference. When reexamined with correlated soft particles included, we observe that these dijets then exhibit a unique new feature-momentum balance is restored to that observed in pp for a jet resolution parameter of R=0.4, while rebalancing is not attained with a smaller value of R=0.2.

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