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| 題名: | Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high pT |
| 作者: | 彭仁傑;Birsa, R;Polyakov, V A;Kouznetsov, O;Szameitat, T;Kuhn, R;Kisselev, Yu;Sozzi, F;Orlov, I;Giordano, F;Schopferer, S;Krämer, M;Büchele, M;Dhara, L;Balestra, F;Slunecka, M;Weisrock, T;Chung, S U;Eyrich, W;Peshekhonov, D V;Ramos, S;Denisov, O Yu;Schmidt, K;Zaremba, K;Nunes, A S;Amoroso, A;Gavrichtchouk, O P;Austregesilo, A;Sbrizzai, G;Beck, R;Kurek, K;Srnka, A;Gautheron, F;Longo, R;Haas, F;Cicuttin, A;Montuenga, P;Nerling, F;Nowak, W-D;Grube, B;Sinha, L;Rychter, A;Frolov, V;Marzec, J;Ziembicki, M;Bradamante, F;Bernhard, J;Horikawa, N;Ishimoto, S;Nikolaenko, V I;Finger, M;Klein, F;Heinsius, F H;Kolosov, V N;Kotzinian, A M;Meshcheryakov, G;Bisplinghoff, J;Maggiora, A;ter Wolbeek, J;Herrmann, F;Pereira, F;Joosten, R;Doshita, N;Marchand, C;Lednev, A A;Jary, V;Suzuki, H;Schiavon, P;Dünnweber, W;Eversheim, P D;Khaustov, G V;Pešek, M;Makins, N;Faessler, M;Grabmüller, S;Ferrero, A;Parsamyan, B;Franco, C;Sznajder, P;Matoušek, J;Chiosso, M;Magnon, A;Bielert, E R;Sandacz, A;Samoylenko, V D;Kurjata, R P;Alexeev, M G;Guskov, A;Nový, J;Gnesi, I;Levillain, M;Kremser, P;Savin, I A;Martin, A;Tosello, F;Efremov, A;Tessarotto, F;Sarkar, S;Ostrick, M;Fuchey, E;Neyret, D |
| 貢獻者: | 高能與強場物理研究中心 |
| 關鍵詞: | Experiment;Particle Physics |
| 日期: | 2016-02-10 |
| 上傳時間: | 2026-04-23 12:03:27 (UTC+8) |
| 出版者: | Elsevier |
| 摘要: | 摘要： We measured the longitudinal double spin asymmetries $A_{LL}$ for single hadron muo-production off protons and deuterons at photon virtuality $Q^2$ < 1(GeV/$\it c$)$^2$ for transverse hadron momenta $p_T$ in the range 0.7 GeV/$\it c$ to 4 GeV/$\it c$ . They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/$\it c$ or 200 GeV/$\it c$ impinging on polarised $\mathrm{{}^6LiD}$ or $\mathrm{NH_3}$ targets. The experimental asymmetries are compared to next-to-leading order pQCD calculations, and are sensitive to the gluon polarisation $\Delta G$ inside the nucleon in the range of the nucleon momentum fraction carried by gluons $0.05 < x_g < 0.2$. We measured the longitudinal double spin asymmetries ALL for single hadron muoproduction off protons and deuterons at photon virtuality Q2<1(GeV/c)2 for transverse hadron momenta pT in the range 1 GeV/c to 4 GeV/c . They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/c or 200 GeV/c impinging on polarised 6 LiD or NH 3 targets. The experimental asymmetries are compared to next-to-leading order pQCD calculations, and are sensitive to the gluon polarisation Δ G inside the nucleon in the range of the nucleon momentum fraction carried by gluons 0.05<xg<0.2 . We measured the longitudinal double spin asymmetries $A_{LL}$ for single hadron muo-production off protons and deuterons at photon virtuality $Q^2$ < 1(GeV/$\it c$)$^2$ for transverse hadron momenta $p_T$ in the range 0.7 GeV/$\it c$ to 4 GeV/$\it c$ . They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/$\it c$ or 200 GeV/$\it c$ impinging on polarised $\mathrm{{}^6LiD}$ or $\mathrm{NH_3}$ targets. The experimental asymmetries are compared to next-to-leading order pQCD calculations, and are sensitive to the gluon polarisation $\Delta G$ inside the nucleon in the range of the nucleon momentum fraction carried by gluons $0.05 < x_g < 0.2$.
出版日期： 2016-02
出處： Physics letters. B, 2016-02, Vol.753, p.573-579
資源來源： ScienceDirect
識別號： ISSN: 0370-2693
識別號： ISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2015.12.035 |
| 顯示於類別: | [高能與強場物理研究中心] 期刊論文
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