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

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Title:	Cross section and transverse single-spin asymmetry of η mesons in p↑+p collisions at s =200GeV at forward rapidity
Authors:	彭仁傑;Aidala, C.;Akiba, Y.;Akimoto, R.;Al-Bataineh, H.;Awes, T. C.;Bandara, N. S.;Belikov, S.;Belmont, R.;Berdnikov, A.;Blau, D. S.;Boyle, K.;Brooks, M. L.;Bumazhnov, V.;Christiansen, P.;Chung, P.;Connors, M.;Durham, J. M.;D’Orazio, L.;En’yo, H.;Esumi, S.;Fadem, B.;Fraenkel, Z.;Fujiwara, K.;Gal, C.;Garishvili, I.;Cassagnac, R. Granier de;Grim, G.;Perdekamp, M. Grosse;Gunji, T.;Hahn, K. I.;Han, R.;Hill, J. C.;Hong, B.;Horaguchi, T.;Ichimiya, R.;Ishihara, M.;Iwanaga, Y.;Jacak, B. V.;Jezghani, M.;Jia, J.;Jiang, X.;Johnson, B. M.;Jouan, D.;Kang, J. S.;Karatsu, K.;Kim, B. I.;Kim, C.;Kim, D. H.;Kim, H.-J.;Kistenev, E.;Kleinjan, D.;Kofarago, M.;Komkov, B.;Kotov, D.;Kurosawa, M.;Lacey, R.;Lai, Y. S.;Lee, K. B.;Li, X.;Liu, H.;McCumber, M.;Meredith, B.;Miki, K.;Miller, A. J.;Mishra, D. K.;Moon, T.;Nagy, M. I.;Nakamura, K. R.;Nakamura, T.;Newby, J.;Novitzky, N.;Oka, M.;Papavassiliou, V.;Patel, M.;Perepelitsa, D. V.;Peressounko, D. Yu.;Rosati, M.;Sahlmueller, B.;Sakashita, K.;Sako, H.;Sato, S.;Schaefer, B.;Seidl, R.;Shibata, T.-A.;Shimomura, M.;Shoji, K.;Sickles, A.;Silvestre, C.;Singh, B. K.;Stepanov, M.;Stoll, S. P.;Sukhanov, A.;Themann, H.;Thomas, D.;Thomas, T. L.;Tomášek, L.;Wang, X. R.;Winter, D.;Yang, R.;Zelenski, A.
Contributors:	高能與強場物理研究中心
Keywords:	[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex];eta meson;NATURAL SCIENCES. Physics;p+p;PHENIX;polarized beam;PRIRODNE ZNANOSTI. Fizika;RHIC;spin asymmetry;spin asymmetry;polarized beam;p+p;eta meson;PHENIX;RHIC
Date:	2014-10-20
Issue Date:	2026-04-23 12:00:37 (UTC+8)
Publisher:	American Physical Society;American Physical Society (APS)
Abstract:	摘要： We present a measurement of the cross section and transverse single-spin asymmetry (AN) for η mesons at large pseudorapidity from sqrt(s)=200 GeV p↑+p collisions. The measured cross section for 0.5 < pT < 5.0 GeV/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 < 4.5 GeV/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. 出版者： American Physical Society (APS) 出版日期： 2014-10-20 出處： Physical Review D, 2014-10, Vol.90 (7) 識別號： ISSN: 1550-7998 識別號： DOI: 10.1103/physrevd.90.072008
Appears in Collections:	[Center for High Energy and High Field Physics (CHiP)] journal & Dissertation

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