Double-spin asymmetry of electrons from heavy-flavor decays in p+p collisions at √s=200 GeV

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Title:	Double-spin asymmetry of electrons from heavy-flavor decays in p+p collisions at √s=200 GeV
Authors:	彭仁傑;Ajitanand, N. N.;Alexander, J.;Angerami, A.;Barish, K. N.;Basye, A. T.;Bathe, S.;Bumazhnov, V.;Bunce, G.;Campbell, S.;Chi, C. Y.;Christiansen, Peter;Cianciolo, V.;del Valle, Z. Conesa;Dion, A.;Drees, K. A.;Engelmore, T.;Esumi, S.;Frawley, A. D.;Gunji, T.;Gustafsson, Hans-Åke;Hanks, J.;Harper, C.;Hemmick, T. K.;Hester, T.;Holzmann, W.;Horaguchi, T.;Isupov, A.;Jouan, D.;Kapustinsky, J.;Kasai, M.;Kim, B. I.;Kim, D. J.;Kiss, A.;Kistenev, E.;Koster, J.;Kunde, G. J.;Kurita, K.;Kwon, Y.;Lai, Y. S.;Lajoie, J. G.;Lee, D. M.;Levy, L. A. Linden;Litvinenko, A.;Liu, H.;Liu, M. X.;Love, B.;Maguire, C. F.;Manko, V. I.;McKinney, C.;Means, N.;Mendoza, M.;Motschwiller, S.;Moukhanova, T. V.;Nakamura, K. R.;Nakano, K.;Nguyen, M.;Nouicer, R.;Okada, K.;Pak, R.;Pantuev, V.;Papavassiliou, V.;Park, S. K.;Pate, S. F.;Pereira, H.;Pisani, R. P.;Proissl, M.;Purschke, M. L.;Qu, H.;Riabov, V.;Roach, D.;Rolnick, S. D.;Sato, T.;Sawada, S.;Sedgwick, K.;Seto, R.;Shibata, T-A;Shukla, P.;Singh, B. K.;Singh, C. P.;Sondheim, W. E.;Sorensen, S. P.;Sugitate, T.;Taketani, A.;Tanabe, R.;Taneja, S.;Tanida, K.;Tarafdar, S.;Tennant, E.;Tsuchimoto, Y.;van Hecke, H. W.;Vznuzdaev, E.;Watanabe, K.;Watanabe, Y.;Watanabe, Y. S.;Yanovich, A.;Yoo, J. S.;You, Z.;Young, G. R.;Zajc, W. A.;Zelenski, A.
Contributors:	高能與強場物理研究中心
Keywords:	Fysik;Natural Sciences;Naturvetenskap;Physical Sciences;Subatomic Physics;Subatom�r fysik
Date:	2013-01-29
Issue Date:	2026-04-23 12:01:32 (UTC+8)
Publisher:	American Physical Society
Abstract:	摘要： We report on the first measurement of the double-spin asymmetry, A(LL), of electrons from the decays of hadrons containing heavy flavor in longitudinally polarized p + p collisions at root s = 200 GeV for p(T) = 0.5 to 3.0 GeV/c. The asymmetry was measured at midrapidity (vertical bar eta vertical bar < 0.35) with the PHENIX detector at the Relativistic Heavy Ion Collider. The measured asymmetries are consistent with zero within the statistical errors. We obtained a constraint for the polarized gluon distribution in the proton of vertical bar Delta g/g(log(10)(x) = -1.6(-0.4)(+0.5), mu = m(T)(c)vertical bar(2) < 0.030 (1 sigma) based on a leading-order perturbative quantum chromodynamics model, using the measured asymmetry. DOI: 10.1103/PhysRevD.87.012011 出版日期： 2013 出處： Physical Review D (Particles, Fields, Gravitation and Cosmology), 2013, Vol.87 (1) 識別號： ISSN: 2470-0029 識別號： ISSN: 1550-2368 識別號： DOI: 10.1103/PhysRevD.87.012011
Appears in Collections:	[Center for High Energy and High Field Physics (CHiP)] journal & Dissertation

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