/ hep-ex arXiv:1610.06616


Measurement of the cross section and longitudinal double-spin asymmetry for di-jet production in polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV


Adamczyk, L. (AGH-UST, Cracow) ; Adkins, J.K. (U. Kentucky, Lexington) ; Agakishiev, G. (Dubna, JINR) ; Aggarwal, M.M. (Panjab U.) ; Ahammed, Z. (Calcutta, VECC) ; Alekseev, I. (Moscow Phys. Eng. Inst.) ; Anderson, D.M. (Texas A-M) ; Aoyama, R. (Tsukuba U.) ; Aparin, A. (Dubna, JINR) ; Arkhipkin, D. (Brookhaven) ; Aschenauer, E.C. (Brookhaven) ; Ashraf, M.U. (Tsinghua U., Beijing) ; Attri, A. (Panjab U.) ; Averichev, G.S. (Dubna, JINR) ; Bai, X. (Hua-Zhong Normal U.) ; Bairathi, V. (Bhubaneswar, NISER) ; Bellwied, R. (Houston U.) ; Bhasin, A. (Jammu U.) ; Bhati, A.K. (Panjab U.) ; Bhattarai, P. (Texas U.) ; Bielcik, J. (Prague, Tech. U.) ; Bielcikova, J. (Charles U.) ; Bland, L.C. (Brookhaven) ; Bordyuzhin, I.G. (Moscow, ITEP) ; Bouchet, J. (Kent State U.) ; Brandenburg, J.D. (Rice U.) ; Brandin, A.V. (Moscow Phys. Eng. Inst.) ; Brown, D. (Lehigh U.) ; Bunzarov, I. (Dubna, JINR) ; Butterworth, J. (Rice U.) ; Caines, H. (Yale U.) ; Calderón de la Barca Sánchez, M. (UC, Davis) ; Campbell, J.M. (Ohio State U.) ; Cebra, D. (UC, Davis) ; Chakaberia, I. (Brookhaven) ; Chaloupka, P. (Prague, Tech. U.) ; Chang, Z. (Texas A-M) ; Chatterjee, A. (Calcutta, VECC) ; Chattopadhyay, S. (Calcutta, VECC) ; Chen, X. (Lanzhou, Inst. Modern Phys.) ; Chen, J.H. (SINAP, Shanghai) ; Cheng, J. (Tsinghua U., Beijing) ; Cherney, M. (Creighton U.) ; Christie, W. (Brookhaven) ; Contin, G. (LBL, Berkeley) ; Crawford, H.J. (UC, Berkeley) ; Das, S. (Bhubaneswar, Inst. Phys.) ; De Silva, L.C. (Creighton U.) ; Debbe, R.R. (Brookhaven) ; Dedovich, T.G. (Dubna, JINR) ; Deng, J. (Shandong U.) ; Derevschikov, A.A. (Serpukhov, IHEP) ; Didenko, L. (Brookhaven) ; Dilks, C. (Penn State U.) ; Dong, X. (LBL, Berkeley) ; Drachenberg, J.L. (Lamar U.) ; Draper, J.E. (UC, Davis) ; Du, C.M. (Lanzhou, Inst. Modern Phys.) ; Dunkelberger, L.E. (UCLA) ; Dunlop, J.C. (Brookhaven) ; Efimov, L.G. (Dubna, JINR) ; Elsey, N. (Wayne State U.) ; Engelage, J. (UC, Berkeley) ; Eppley, G. (Rice U.) ; Esha, R. (UCLA) ; Esumi, S. (Tsukuba U.) ; Evdokimov, O. (Illinois U., Chicago) ; Ewigleben, J. (Lehigh U.) ; Eyser, O. (Brookhaven) ; Fatemi, R. (U. Kentucky, Lexington) ; Fazio, S. (Brookhaven) ; Federic, P. (Charles U.) ; Federicova, P. (Prague, Tech. U.) ; Fedorisin, J. (Dubna, JINR) ; Feng, Z. (Hua-Zhong Normal U.) ; Filip, P. (Dubna, JINR) ; Fisyak, Y. (Brookhaven) ; Flores, C.E. (UC, Davis) ; Fulek, L. (AGH-UST, Cracow) ; Gagliardi, C.A. (Texas A-M) ; Garand, D. (Purdue U.) ; Geurts, F. (Rice U.) ; Gibson, A. (Valparaiso U., Indiana) ; Girard, M. (Warsaw U. of Tech.) ; Greiner, L. (LBL, Berkeley) ; Grosnick, D. (Valparaiso U., Indiana) ; Gunarathne, D.S. (Pennsylvania U.) ; Guo, Y. (Kent State U.) ; Gupta, S. (Jammu U.) ; Gupta, A. (Jammu U.) ; Guryn, W. (Brookhaven) ; Hamad, A.I. (Kent State U.) ; Hamed, A. (Texas A-M) ; Haque, R. (Bhubaneswar, NISER) ; Harris, J.W. (Yale U.) ; He, L. (Purdue U.) ; Heppelmann, S. (Penn State U.) ; Heppelmann, S. (UC, Davis) ; Hirsch, A. (Purdue U.) ; Hoffmann, G.W. (Texas U.) ; Horvat, S. (Yale U.) ; Huang, X. (Tsinghua U., Beijing) ; Huang, B. (Illinois U., Chicago) ; Huang, T. (Taiwan, Natl. Cheng Kung U.) ; Huang, H.Z. (UCLA) ; Huck, P. (Hua-Zhong Normal U.) ; Humanic, T.J. (Ohio State U.) ; Igo, G. (UCLA) ; Jacobs, W.W. (Indiana U.) ; Jentsch, A. (Texas U.) ; Jia, J. (SUNY, Stony Brook) ; Jiang, K. (Hefei, CUST) ; Jowzaee, S. (Wayne State U.) ; Judd, E.G. (UC, Berkeley) ; Kabana, S. (Kent State U.) ; Kalinkin, D. (Indiana U.) ; Kang, K. (Tsinghua U., Beijing) ; Kauder, K. (Wayne State U.) ; Ke, H.W. (Brookhaven) ; Keane, D. (Kent State U.) ; Kechechyan, A. (Dubna, JINR) ; Khan, Z. (Illinois U., Chicago) ; Kikoła , D.P. (Warsaw U. of Tech.) ; Kisel, I. (Frankfurt U., FIAS) ; Kisiel, A. (Warsaw U. of Tech.) ; Kochenda, L. (Moscow Phys. Eng. Inst.) ; Koetke, D.D. (Valparaiso U., Indiana) ; Kosarzewski, L.K. (Warsaw U. of Tech.) ; Kraishan, A.F. (Pennsylvania U.) ; Kravtsov, P. (Moscow Phys. Eng. Inst.) ; Krueger, K. (Argonne, HEP) ; Kulathunga, N. (Houston U.) ; Kumar, L. (Panjab U.) ; Lacey, R. (SUNY, Stony Brook) ; Lamont, M.A.C. (Brookhaven) ; Landgraf, J.M. (Brookhaven) ; Landry, K.D. (UCLA) ; Lauret, J. (Brookhaven) ; Lebedev, A. (Brookhaven) ; Lednicky, R. (Dubna, JINR) ; Lee, J.H. (Brookhaven) ; Li, W. (SINAP, Shanghai) ; Li, C. (Hefei, CUST) ; Li, X. (Hefei, CUST) ; Li, Y. (Tsinghua U., Beijing) ; Li, X. (Pennsylvania U.) ; Lin, T. (Indiana U.) ; Lisa, M.A. (Ohio State U.) ; Liu, F. (Hua-Zhong Normal U.) ; Liu, Y. (Texas A-M) ; Ljubicic, T. (Brookhaven) ; Llope, W.J. (Wayne State U.) ; Lomnitz, M. (Kent State U.) ; Longacre, R.S. (Brookhaven) ; Luo, X. (Hua-Zhong Normal U.) ; Luo, S. (Illinois U., Chicago) ; Ma, Y.G. (SINAP, Shanghai) ; Ma, G.L. (SINAP, Shanghai) ; Ma, R. (Brookhaven) ; Ma, L. (SINAP, Shanghai) ; Magdy, N. (SUNY, Stony Brook) ; Majka, R. (Yale U.) ; Manion, A. (LBL, Berkeley) ; Margetis, S. (Kent State U.) ; Markert, C. (Texas U.) ; Matis, H.S. (LBL, Berkeley) ; McDonald, D. (Houston U.) ; McKinzie, S. (LBL, Berkeley) ; Meehan, K. (UC, Davis) ; Mei, J.C. (Shandong U.) ; Miller, Z.W. (Illinois U., Chicago) ; Minaev, N.G. (Serpukhov, IHEP) ; Mioduszewski, S. (Texas A-M) ; Mishra, D. (Bhubaneswar, NISER) ; Mohanty, B. (Bhubaneswar, NISER) ; Mondal, M.M. (Texas A-M) ; Morozov, D.A. (Serpukhov, IHEP) ; Mustafa, M.K. (LBL, Berkeley) ; Nasim, Md. (UCLA) ; Nayak, T.K. (Calcutta, VECC) ; Nigmatkulov, G. (Moscow Phys. Eng. Inst.) ; Niida, T. (Wayne State U.) ; Nogach, L.V. (Serpukhov, IHEP) ; Nonaka, T. (Tsukuba U.) ; Novak, J. (Michigan State U.) ; Nurushev, S.B. (Serpukhov, IHEP) ; Odyniec, G. (LBL, Berkeley) ; Ogawa, A. (Brookhaven) ; Oh, K. (Pusan Natl. U.) ; Okorokov, V.A. (Moscow Phys. Eng. Inst.) ; , D.Olvitt Jr. (Pennsylvania U.) ; Page, B.S. (Brookhaven) ; Pak, R. (Brookhaven) ; Pan, Y.X. (UCLA) ; Pandit, Y. (Illinois U., Chicago) ; Panebratsev, Y. (Dubna, JINR) ; Pawlik, B. (Cracow, INP) ; Pei, H. (Hua-Zhong Normal U.) ; Perkins, C. (UC, Berkeley) ; Pile, P. (Brookhaven) ; Pluta, J. (Warsaw U. of Tech.) ; Poniatowska, K. (Warsaw U. of Tech.) ; Porter, J. (LBL, Berkeley) ; Posik, M. (Pennsylvania U.) ; Poskanzer, A.M. (LBL, Berkeley) ; Pruthi, N.K. (Panjab U.) ; Przybycien, M. (AGH-UST, Cracow) ; Putschke, J. (Wayne State U.) ; Qiu, H. (Purdue U.) ; Quintero, A. (Pennsylvania U.) ; Ramachandran, S. (U. Kentucky, Lexington) ; Ray, R.L. (Texas U.) ; Reed, R. (Lehigh U.) ; Rehbein, M.J. (Creighton U.) ; Ritter, H.G. (LBL, Berkeley) ; Roberts, J.B. (Rice U.) ; Rogachevskiy, O.V. (Dubna, JINR) ; Romero, J.L. (UC, Davis) ; Roth, J.D. (Creighton U.) ; Ruan, L. (Brookhaven) ; Rusnak, J. (Charles U.) ; Rusnakova, O. (Prague, Tech. U.) ; Sahoo, N.R. (Texas A-M) ; Sahu, P.K. (Bhubaneswar, Inst. Phys.) ; Sakrejda, I. (LBL, Berkeley) ; Salur, S. (LBL, Berkeley) ; Sandweiss, J. (Yale U.) ; Schambach, J. (Texas U.) ; Scharenberg, R.P. (Purdue U.) ; Schmah, A.M. (LBL, Berkeley) ; Schmidke, W.B. (Brookhaven) ; Schmitz, N. (Munich, Max Planck Inst.) ; Seger, J. (Creighton U.) ; Seyboth, P. (Munich, Max Planck Inst.) ; Shah, N. (SINAP, Shanghai) ; Shahaliev, E. (Dubna, JINR) ; Shanmuganathan, P.V. (Lehigh U.) ; Shao, M. (Hefei, CUST) ; Sharma, B. (Panjab U.) ; Sharma, A. (Jammu U.) ; Sharma, M.K. (Jammu U.) ; Shen, W.Q. (SINAP, Shanghai) ; Shi, Z. (LBL, Berkeley) ; Shi, S.S. (Hua-Zhong Normal U.) ; Shou, Q.Y. (SINAP, Shanghai) ; Sichtermann, E.P. (LBL, Berkeley) ; Sikora, R. (AGH-UST, Cracow) ; Simko, M. (Charles U.) ; Singha, S. (Kent State U.) ; Skoby, M.J. (Indiana U.) ; Smirnov, N. (Yale U.) ; Smirnov, D. (Brookhaven) ; Solyst, W. (Indiana U.) ; Song, L. (Houston U.) ; Sorensen, P. (Brookhaven) ; Spinka, H.M. (Argonne, HEP) ; Srivastava, B. (Purdue U.) ; Stanislaus, T.D.S. (Valparaiso U., Indiana) ; Stepanov, M. (Purdue U.) ; Stock, R. (Frankfurt U., FIAS) ; Strikhanov, M. (Moscow Phys. Eng. Inst.) ; Stringfellow, B. (Purdue U.) ; Sugiura, T. (Tsukuba U.) ; Sumbera, M. (Charles U.) ; Summa, B. (Penn State U.) ; Sun, Z. (Lanzhou, Inst. Modern Phys.) ; Sun, X.M. (Hua-Zhong Normal U.) ; Sun, Y. (Hefei, CUST) ; Surrow, B. (Pennsylvania U.) ; Svirida, D.N. (Moscow, ITEP) ; Tang, A.H. (Brookhaven) ; Tang, Z. (Hefei, CUST) ; Taranenko, A. (Moscow Phys. Eng. Inst.) ; Tarnowsky, T. (Michigan State U.) ; Tawfik, A. (WLCAPP, Cairo) ; Thäder, J. (LBL, Berkeley) ; Thomas, J.H. (LBL, Berkeley) ; Timmins, A.R. (Houston U.) ; Tlusty, D. (Rice U.) ; Todoroki, T. (Brookhaven) ; Tokarev, M. (Dubna, JINR) ; Trentalange, S. (UCLA) ; Tribble, R.E. (Texas A-M) ; Tribedy, P. (Brookhaven) ; Tripathy, S.K. (Bhubaneswar, Inst. Phys.) ; Tsai, O.D. (UCLA) ; Ullrich, T. (Brookhaven) ; Underwood, D.G. (Argonne, HEP) ; Upsal, I. (Ohio State U.) ; Van Buren, G. (Brookhaven) ; van Nieuwenhuizen, G. (Brookhaven) ; Vasiliev, A.N. (Serpukhov, IHEP) ; Vertesi, R. (Charles U.) ; Videbæk, F. (Brookhaven) ; Vokal, S. (Dubna, JINR) ; Voloshin, S.A. (Wayne State U.) ; Vossen, A. (Indiana U.) ; Wang, G. (UCLA) ; Wang, J.S. (Lanzhou, Inst. Modern Phys.) ; Wang, F. (Purdue U.) ; Wang, Y. (Tsinghua U., Beijing) ; Wang, Y. (Hua-Zhong Normal U.) ; Webb, G. (Brookhaven) ; Webb, J.C. (Brookhaven) ; Wen, L. (UCLA) ; Westfall, G.D. (Michigan State U.) ; Wieman, H. (LBL, Berkeley) ; Wissink, S.W. (Indiana U.) ; Witt, R. (Naval Academy, Annapolis) ; Wu, Y. (Kent State U.) ; Xiao, Z.G. (Tsinghua U., Beijing) ; Xie, W. (Purdue U.) ; Xie, G. (Hefei, CUST) ; Xin, K. (Rice U.) ; Xu, H. (Lanzhou, Inst. Modern Phys.) ; Xu, Q.H. (Shandong U.) ; Xu, Y.F. (SINAP, Shanghai) ; Xu, N. (LBL, Berkeley) ; Xu, Z. (Brookhaven) ; Xu, J. (Hua-Zhong Normal U.) ; Yang, Y. (Hua-Zhong Normal U.) ; Yang, S. (Hefei, CUST) ; Yang, Y. (Taiwan, Natl. Cheng Kung U.) ; Yang, Y. (Lanzhou, Inst. Modern Phys.) ; Yang, C. (Hefei, CUST) ; Yang, Q. (Hefei, CUST) ; Ye, Z. (Illinois U., Chicago) ; Yi, L. (Yale U.) ; Yip, K. (Brookhaven) ; Yoo, I.-K. (Pusan Natl. U.) ; Yu, N. (Hua-Zhong Normal U.) ; Zbroszczyk, H. (Warsaw U. of Tech.) ; Zha, W. (Hefei, CUST) ; Zhang, Y. (Hefei, CUST) ; Zhang, J. (Shandong U.) ; Zhang, X.P. (Tsinghua U., Beijing) ; Zhang, J.B. (Hua-Zhong Normal U.) ; Zhang, Z. (SINAP, Shanghai) ; Zhang, S. (Hefei, CUST) ; Zhang, J. (Lanzhou, Inst. Modern Phys.) ; Zhang, S. (SINAP, Shanghai) ; Zhao, J. (Purdue U.) ; Zhong, C. (SINAP, Shanghai) ; Zhou, L. (Hefei, CUST) ; Zhu, X. (Tsinghua U., Beijing) ; Zoulkarneeva, Y. (Dubna, JINR) ; Zyzak, M. (Frankfurt U., FIAS)

Pages: 7

Abstract: We report the first measurement of the longitudinal double-spin asymmetry $A_{LL}$ for mid-rapidity di-jet production in polarized $pp$ collisions at a center-of-mass energy of $\sqrt{s} = 200$ GeV. The di-jet cross section was measured and is shown to be consistent with next-to-leading order (NLO) perturbative QCD predictions. $A_{LL}$ results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent NLO global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-$x > 0.05$.

Web-Page: http://inspirehep.net/record/1493842/files/figure1.png; http://inspirehep.net/record/1493842/files/figure3.png; http://inspirehep.net/record/1493842/files/figure2.png; http://inspirehep.net/record/1493842/files/figure4.png; http://inspirehep.net/record/1493842/files/arXiv:1610.06616.pdf


Note: 7 pages, 4 figures

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