The spin structure function gp1 of the proton and a test of the Bjorken sum rule
The spin structure function gp1 of the proton and a test of the Bjorken sum rule
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DOI：
10.1016/j.physletb.2015.11.064
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发表时间：
2015-03
影响因子：
4.4
通讯作者：
C. Adolph;R. Akhunzyanov;M. Alexeev;G. Alexeev;A. Amoroso;V. Andrieux;V. Anosov;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;J. Barth;G. Baum;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. Buechele;É. Burtin;L. Capozza;We-Fu Chang;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;Q. Curiel;S. Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;V. Duic;M. Dziewiecki;A. Efremov;P. Eversheim;W. Eyrich;A. Ferrero;M. Finger;H. Fischer;C. Franco;N. D. F. V. 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;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;P. Jörg;R. Joosten;E. Kabuß;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;K. Klimaszewski;J. Koivuniemi;V. Kolosov;K. Kondo;K. Koenigsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;M. Kraemer;P. Kremser;F. Krinner;Z. Kroumchtein;N. Kuchinski;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;Anna Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;W. Meyer;T. Michigami;Y. Mikhailov;Y. Miyachi;A. Nagaytsev;T. Nagel;F. Nerling;D. Neyret;V. Nikolaenko;J. Nový;W. Nowak;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;E. Rocco;N. Rossiyskaya;D. Ryabchikov;A. Rychter;V. Samoylenko;A. Sandacz;C. Santos;S. Sarkar;I. Savin;G. Sbrizzai;P. Schiavon;K. Schmidt;H. Schmieden;K. Schönning;S. Schopferer;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;F. Sozzi;A. Srnka;M. Stolarski;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takekawa;J. Wolbeek;S. Tessaro;F. Tessarotto;F. Thibaud;F. Tosello;V. Tskhay;S. Uhl;J. Veloso;M. Virius;T. Weisrock;M. Wilfert;R. Windmolders;K. Zaremba;M. Zavertyaev;E. Zemlyanichkina;M. Ziembicki;A. Zink
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文献类型：
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作者：
C. Adolph;R. Akhunzyanov;M. Alexeev;G. Alexeev;A. Amoroso;V. Andrieux;V. Anosov;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;J. Barth;G. Baum;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. Buechele;É. Burtin;L. Capozza;We-Fu Chang;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;Q. Curiel;S. Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;V. Duic;M. Dziewiecki;A. Efremov;P. Eversheim;W. Eyrich;A. Ferrero;M. Finger;H. Fischer;C. Franco;N. D. F. V. 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;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;P. Jörg;R. Joosten;E. Kabuß;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;K. Klimaszewski;J. Koivuniemi;V. Kolosov;K. Kondo;K. Koenigsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;M. Kraemer;P. Kremser;F. Krinner;Z. Kroumchtein;N. Kuchinski;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;Anna Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;W. Meyer;T. Michigami;Y. Mikhailov;Y. Miyachi;A. Nagaytsev;T. Nagel;F. Nerling;D. Neyret;V. Nikolaenko;J. Nový;W. Nowak;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;E. Rocco;N. Rossiyskaya;D. Ryabchikov;A. Rychter;V. Samoylenko;A. Sandacz;C. Santos;S. Sarkar;I. Savin;G. Sbrizzai;P. Schiavon;K. Schmidt;H. Schmieden;K. Schönning;S. Schopferer;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;F. Sozzi;A. Srnka;M. Stolarski;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takekawa;J. Wolbeek;S. Tessaro;F. Tessarotto;F. Thibaud;F. Tosello;V. Tskhay;S. Uhl;J. Veloso;M. Virius;T. Weisrock;M. Wilfert;R. Windmolders;K. Zaremba;M. Zavertyaev;E. Zemlyanichkina;M. Ziembicki;A. Zink
给出了双自旋不对称性A1p和质子纵向自旋结构函数g1p的新结果。它们是由COMPASS合作使用从纵向极化的NH3靶上散布的极化的200GeV介子获得的。这些数据是在2011年收集的，补充了2007年在160GeV下记录的数据，特别是在较低的x值下。它们将x≲0.02区g1p(X)的统计精度提高了约两倍。执行与g1世界数据相适应的次前导顺序QCD。它重新确定了夸克自旋对核子自旋ΔΣ的贡献，范围为0.2 6~0.36，并重新评估了g1p的一阶矩.ΔΣ的不确定性主要是由于目前胶子螺旋度分布的测定存在较大的不确定性.基于COMPASS结果对非单线态结构函数g1NS(x，q2)的Bjorken求和规则进行了新的评估，得到了轴向和矢量耦合常数的比值|gA/gV|=1.22±0.05(统计)±0.10(系统)，从而验证了求和规则的精度约为9%。
New results for the double spin asymmetry A 1 p and the proton longitudinal spin structure function g 1 p are presented. They were obtained by the COMPASS Collaboration using polarised 200 GeV muons scattered off a longitudinally polarised NH 3 target. The data were collected in 2011 and complement those recorded in 2007 at 160 GeV, in particular at lower values of x. They improve the statistical precision of g 1 p (x) by about a factor of two in the region x≲ 0.02. A next-to-leading order QCD fit to the g 1 world data is performed. It leads to a new determination of the quark spin contribution to the nucleon spin, ΔΣ, ranging from 0.26 to 0.36, and to a re-evaluation of the first moment of g 1 p. The uncertainty of ΔΣ is mostly due to the large uncertainty in the present determinations of the gluon helicity distribution. A new evaluation of the Bjorken sum rule based on the COMPASS results for the non-singlet structure function g 1 NS (x, Q 2) yields as ratio of the axial and vector coupling constants| g A/g V|= 1.22±0.05 (stat.)±0.10 (syst.), which validates the sum rule to an accuracy of about 9%.