Leading-order determination of the gluon polarisation from semi-inclusive deep inelastic scattering data
Leading-order determination of the gluon polarisation from semi-inclusive deep inelastic scattering data
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DOI：
10.1140/epjc/s10052-017-4716-x
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
C. Adolph;M. Aghasyan;R. Akhunzyanov;M. Alexeev;G. Alexeev;A. Amoroso;V. Andrieux;N. Anfimov;V. Anosov;W. Augustyniak;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;J. Barth;R. Beck;Y. Bedfer;J. Bernhard;K. Bicker;E. Bielert;R. Birsa;J. Bisplinghoff;M. Bodlák;M. Boer;P. Bordalo;F. Bradamante;C. Braun;A. Bressan;M. Büchele;W. Chang;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;Q. Curiel;S. Dalla Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;V. Duic;W. Dünnweber;M. Dziewiecki;A. Efremov;P. Eversheim;W. Eyrich;M. Faessler;A. Ferrero;M. Finger;M. Jr.;H. Fischer;C. Franco;N. Fresne von Hohenesche;J. Friedrich;V. Frolov;E. Fuchey;F. Gautheron;O. Gavrichtchouk;S. Gerassimov;F. Giordano;I. Gnesi;M. Gorzellik;S. Grabmüller;A. Grasso;M. Grosse Perdekamp;B. Grube;T. Grussenmeyer;A. Guskov;F. Haas;D. Hahne;D. Harrach;R. Hashimoto;F. Heinsius;R. Heitz;F. Herrmann;F. Hinterberger;N. Horikawa;N. d'Hose;C. Hsieh;S. Huber;S. Ishimoto;A. Ivanov;Y. Ivanshin;T. Iwata;R. Jahn;V. Jarý;R. Joosten;P. Jörg;E. Kabuß;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;K. Klimaszewski;J. Koivuniemi;V. Kolosov;K. Kondo;K. Königsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;M. Krämer;P. Kremser;F. Krinner;Z. Kroumchtein;Y. Kulinich;F. Kunne;K. Kurek;R. Kurjata;A. Lednev;A. Lehmann;M. Levillain;S. Levorato;J. Lichtenstadt;R. Longo;A. Maggiora;A. Magnon;N. Makins;N. Makke;G. Mallot;C. Marchand;B. Mariański;A. Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;W. Meyer;T. Michigami;Y. Mikhailov;M. Mikhasenko;Y. Miyachi;P. Montuenga;A. Nagaytsev;F. Nerling;D. Neyret;V. Nikolaenko;J. Nový;W. Nowak;G. Nukazuka;A. S. Nunes;A. Olshevsky;I. Orlov;M. Ostrick;D. Panzieri;B. Parsamyan;S. Paul;J. Peng;F. Pereira;M. Pešek;D. Peshekhonov;S. Platchkov;J. Pochodzalla;V. Polyakov;J. Pretz;M. Quaresma;C. Quintans;S. Ramos;C. Regali;G. Reicherz;C. Riedl;M. Roskot;N. Rossiyskaya;D. Ryabchikov;A. Rybnikov;A. Rychter;R. Salac;V. Samoylenko;A. Sandacz;C. Santos;S. Sarkar;I. Savin;T. Sawada;G. Sbrizzai;P. Schiavon;K. Schmidt;H. Schmieden;K. Schönning;S. Schopferer;E. Seder;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;J. Smolík;F. Sozzi;A. Srnka;M. Stolarski;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takekawa;M. Tasevsky;S. Tessaro;F. Tessarotto;F. Thibaud;F. Tosello;V. Tskhay;S. Uhl;J. Veloso;M. Virius;J. Vondra;T. Weisrock;M. Wilfert;J. Wolbeek;K. Zaremba;P. Zavada;M. Zavertyaev;E. Zemlyanichkina;M. Ziembicki;A. Zink;C. Collaboration
中科院分区：
文献类型：
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作者：
C. Adolph;M. Aghasyan;R. Akhunzyanov;M. Alexeev;G. Alexeev;A. Amoroso;V. Andrieux;N. Anfimov;V. Anosov;W. Augustyniak;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;J. Barth;R. Beck;Y. Bedfer;J. Bernhard;K. Bicker;E. Bielert;R. Birsa;J. Bisplinghoff;M. Bodlák;M. Boer;P. Bordalo;F. Bradamante;C. Braun;A. Bressan;M. Büchele;W. Chang;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;Q. Curiel;S. Dalla Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;V. Duic;W. Dünnweber;M. Dziewiecki;A. Efremov;P. Eversheim;W. Eyrich;M. Faessler;A. Ferrero;M. Finger;M. Jr.;H. Fischer;C. Franco;N. Fresne von Hohenesche;J. Friedrich;V. Frolov;E. Fuchey;F. Gautheron;O. Gavrichtchouk;S. Gerassimov;F. Giordano;I. Gnesi;M. Gorzellik;S. Grabmüller;A. Grasso;M. Grosse Perdekamp;B. Grube;T. Grussenmeyer;A. Guskov;F. Haas;D. Hahne;D. Harrach;R. Hashimoto;F. Heinsius;R. Heitz;F. Herrmann;F. Hinterberger;N. Horikawa;N. d'Hose;C. Hsieh;S. Huber;S. Ishimoto;A. Ivanov;Y. Ivanshin;T. Iwata;R. Jahn;V. Jarý;R. Joosten;P. Jörg;E. Kabuß;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;K. Klimaszewski;J. Koivuniemi;V. Kolosov;K. Kondo;K. Königsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;M. Krämer;P. Kremser;F. Krinner;Z. Kroumchtein;Y. Kulinich;F. Kunne;K. Kurek;R. Kurjata;A. Lednev;A. Lehmann;M. Levillain;S. Levorato;J. Lichtenstadt;R. Longo;A. Maggiora;A. Magnon;N. Makins;N. Makke;G. Mallot;C. Marchand;B. Mariański;A. Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;W. Meyer;T. Michigami;Y. Mikhailov;M. Mikhasenko;Y. Miyachi;P. Montuenga;A. Nagaytsev;F. Nerling;D. Neyret;V. Nikolaenko;J. Nový;W. Nowak;G. Nukazuka;A. S. Nunes;A. Olshevsky;I. Orlov;M. Ostrick;D. Panzieri;B. Parsamyan;S. Paul;J. Peng;F. Pereira;M. Pešek;D. Peshekhonov;S. Platchkov;J. Pochodzalla;V. Polyakov;J. Pretz;M. Quaresma;C. Quintans;S. Ramos;C. Regali;G. Reicherz;C. Riedl;M. Roskot;N. Rossiyskaya;D. Ryabchikov;A. Rybnikov;A. Rychter;R. Salac;V. Samoylenko;A. Sandacz;C. Santos;S. Sarkar;I. Savin;T. Sawada;G. Sbrizzai;P. Schiavon;K. Schmidt;H. Schmieden;K. Schönning;S. Schopferer;E. Seder;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;J. Smolík;F. Sozzi;A. Srnka;M. Stolarski;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takekawa;M. Tasevsky;S. Tessaro;F. Tessarotto;F. Thibaud;F. Tosello;V. Tskhay;S. Uhl;J. Veloso;M. Virius;J. Vondra;T. Weisrock;M. Wilfert;J. Wolbeek;K. Zaremba;P. Zavada;M. Zavertyaev;E. Zemlyanichkina;M. Ziembicki;A. Zink;C. Collaboration
使用一种新的分析技术，在核子胶子极化重新评估使用纵向双自旋不对称性测量的横截面的半包容性单强子muocreduction与光子虚拟性。这些数据是由欧洲核子研究中心的COMPASS实验获得的，实验中使用了160 GeV/cpolarised μ子束撞击polarisedLiD靶。通过分析强子横动量的全范围，使用神经网络方法分离了潜在过程的不同依赖性。在没有pQCD计算的情况下，在硬标度下，计算了胶子极化的pQCD前导级。它是在胶子携带的核子动量分数的三个区间中确定的，覆盖范围为，并且对三个区间的平均值没有显著的依赖性， ⟨ Δ G / G ⟩ = 0.113 ± 0 . 038 ( stat . ) ± 0 . 036 ( Syst . ) 表明胶子极化在可测范围内是正的。
Using a novel analysis technique, the gluon polarisation in the nucleon is re-evaluated using the longitudinal double-spin asymmetry measured in the cross section of semi-inclusive single-hadron muoproduction with photon virtuality. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/cpolarised muon beam impinging on a polarisedLiD target. By analysing the full range in hadron transverse momentum, the different-dependences of the underlying processes are separated using a neural-network approach. In the absence of pQCD calculations at next-to-leading order in the selected kinematic domain, the gluon polarisationis evaluated at leading order in pQCD at a hard scale of. It is determined in three intervals of the nucleon momentum fraction carried by gluons,, covering the rangeand does not exhibit a significant dependence on. The average over the three intervals, ⟨ Δ g / g ⟩ = 0.113 ± 0 . 038 ( stat . ) ± 0 . 036 ( syst . ) at, suggests that the gluon polarisation is positive in the measuredrange.