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Cross section and transverse single-spin asymmetry of η mesons in p↑+p collisions at s =200GeV at forward rapidity

  • A. Adare
  • , C. Aidala
  • , N. N. Ajitanand
  • , Y. Akiba
  • , R. Akimoto
  • , H. Al-Bataineh
  • , J. Alexander
  • , M. Alfred
  • , A. Angerami
  • , K. Aoki
  • , N. Apadula
  • , Y. Aramaki
  • , H. Asano
  • , E. T. Atomssa
  • , R. Averbeck
  • , T. C. Awes
  • , B. Azmoun
  • , V. Babintsev
  • , M. Bai
  • , G. Baksay
  • L. Baksay, N. S. Bandara, B. Bannier, K. N. Barish, B. Bassalleck, A. T. Basye, S. Bathe, V. Baublis, C. Baumann, A. Bazilevsky, M. Beaumier, S. Beckman, S. Belikov, R. Belmont, R. Bennett, A. Berdnikov, Y. Berdnikov, J. H. Bhom, D. Black, D. S. Blau, J. S. Bok, K. Boyle, M. L. Brooks, J. Bryslawskyj, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, S. Campbell, A. Caringi, C. H. Chen, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, P. Chung, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa Del Valle, M. Connors, M. Csanád, T. Csörgo, T. Dahms, S. Dairaku, I. Danchev, K. Das, A. Datta, M. S. Daugherity, G. David, M. K. Dayananda, K. Deblasio, K. Dehmelt, A. Denisov, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, L. Ding, A. Dion, J. H. Do, M. Donadelli, O. Drapier, A. Drees, K. A. Drees, J. M. Durham, A. Durum, D. Dutta, L. D'Orazio, S. Edwards, Y. V. Efremenko, F. Ellinghaus, T. Engelmore, A. Enokizono, H. En'Yo, S. Esumi, K. O. Eyser, B. Fadem, N. Feege, D. E. Fields, M. Finger, M. Finger, F. Fleuret, S. L. Fokin, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, C. Gal, P. Gallus, P. Garg, I. Garishvili, H. Ge, F. Giordano, A. Glenn, H. Gong, M. Gonin, Y. Goto, R. Granier De Cassagnac, N. Grau, S. V. Greene, G. Grim, M. Grosse Perdekamp, Y. Gu, T. Gunji, H. Guragain, H. A. Gustafsson, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hamblen, R. Han, S. Y. Han, J. Hanks, S. Hasegawa, E. Haslum, R. Hayano, X. He, M. Heffner, T. K. Hemmick, T. Hester, J. C. Hill, M. Hohlmann, R. S. Hollis, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, T. Hoshino, S. Huang, T. Ichihara, R. Ichimiya, Y. Ikeda, K. Imai, Y. Imazu, M. Inaba, A. Iordanova, D. Isenhower, M. Ishihara, M. Issah, D. Ivanischev, D. Ivanishchev, Y. Iwanaga, B. V. Jacak, S. J. Jeon, M. Jezghani, J. Jia, X. Jiang, J. Jin, B. M. Johnson, T. Jones, E. Joo, K. S. Joo, D. Jouan, D. S. 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Timilsina, T. Todoroki, M. Togawa, A. Toia, L. Tomášek, M. Tomášek, H. Torii, M. Towell, R. Towell, R. S. Towell, I. Tserruya, Y. Tsuchimoto, C. Vale, H. Valle, H. W. Van Hecke, M. Vargyas, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, M. Virius, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, Y. S. Watanabe, F. Wei, R. Wei, J. Wessels, S. Whitaker, S. N. White, D. Winter, S. Wolin, C. L. Woody, R. M. Wright, M. Wysocki, B. Xia, L. Xue, S. Yalcin, Y. L. Yamaguchi, K. Yamaura, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, I. Yoon, Z. You, G. R. Young, I. Younus, I. E. Yushmanov, W. A. Zajc, A. Zelenski, S. Zhou
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Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

We present a measurement of the cross section and transverse single-spin asymmetry (AN) for η mesons at large pseudorapidity from s=200GeV p↑+p collisions. The measured cross section for 0.5<pT<5.0GeV/c and 3.0<|η|<3.8 is well described by a next-to-leading-order perturbative-quantum-chromodynamics calculation. The asymmetries AN have been measured as a function of Feynman-x (xF) from 0.2<|xF|<0.7, as well as transverse momentum (pT) from 1.0<pT<4.5GeV/c. The asymmetry averaged over positive xF is 〈AN〉=0.061±0.014. The results are consistent with prior transverse single-spin measurements of forward η and π0 mesons at various energies in overlapping xF ranges. Comparison of different particle species can help to determine the origin of the large observed asymmetries in p↑+p collisions.

Original languageEnglish
Article number072008
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number7
DOIs
StatePublished - Oct 20 2014

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