First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process

First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process
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DOI：
10.1103/physrevlett.119.112002
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发表时间：
2017-04
期刊：
Physical Review Letters
影响因子：
8.6
通讯作者：
M. Aghasyan;R. Akhunzyanov;G. Alexeev;M. Alexeev;A. Amoroso;V. Andrieux;N. Anfimov;V. Anosov;A. Antoshkin;K. Augsten;W. Augustyniak;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;M. Ball;J. Barth;R. Beck;Y. Bedfer;J. Bernhard;K. Bicker;E. Bielert;R. Birsa;M. Bodlák;P. Bordalo;F. Bradamante;A. Bressan;M. Büchele;W. Chang;C. Chatterjee;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;S. Dalla Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;C. Dreisbach;W. Dünnweber;M. Dziewiecki;A. Efremov;P. Eversheim;M. Faessler;A. Ferrero;M. Finger;H. Fischer;C. Franco;N. du Fresne von Hohenesche;J. Friedrich;V. Frolov;E. Fuchey;F. Gautheron;O. Gavrichtchouk;S. Gerassimov;J. Giarra;F. Giordano;I. Gnesi;M. Gorzellik;A. Grasso;M. Grosse Perdekamp;B. Grube;T. Grussenmeyer;A. Guskov;D. Hahne;G. Hamar;D. von Harrach;F. Heinsius;R. Heitz;F. Herrmann;N. Horikawa;N. d'Hose;C. Hsieh;S. Huber;S. Ishimoto;A. Ivanov;Y. Ivanshin;T. Iwata;V. Jarý;R. Joosten;P. Jörg;E. Kabuß;A. Kerbizi;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;J. Koivuniemi;V. Kolosov;K. Kondo;K. Königsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;Z. Kral;M. Krämer;P. Kremser;F. Krinner;Z. Kroumchtein;Y. Kulinich;F. Kunne;K. Kurek;R. Kurjata;A. Kveton;A. Lednev;M. Levillain;S. Levorato;Y.-S. Lian;J. Lichtenstadt;R. Longo;A. Maggiora;A. Magnon;N. Makins;N. Makke;G. Mallot;B. Mariański;A. Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;M. Meyer;W. Meyer;Y. Mikhailov;M. Mikhasenko;E. Mitrofanov;N. Mitrofanov;Y. Miyachi;A. Nagaytsev;F. Nerling;D. Neyret;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;N. Pierre;S. Platchkov;J. Pochodzalla;V. Polyakov;J. Pretz;M. Quaresma;C. Quintans;S. Ramos;C. Regali;G. Reicherz;C. Riedl;N. Rogacheva;M. Roskot;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;E. Seder;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;J. Smolik;A. Srnka;D. Steffen;M. Stolarski;O. Subrt;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takewaka;M. Tasevsky;S. Tessaro;Gonçalo Terça;F. Tessarotto;A. Thiel;J. Tomsa;F. Tosello;V. Tskhay;S. Uhl;A. Vauth;J. Veloso;M. Virius;M. Vit;J. Vondra;S. Wallner;T. Weisrock;M. Wilfert;J. ter Wolbeek;K. Zaremba;P. Zavada;M. Zavertyaev;E. Zemlyanichkina;N. Zhuravlev;M. Ziembicki
M. Aghasyan;R. Akhunzyanov;G. Alexeev;M. Alexeev;A. Amoroso;V. Andrieux;N. Anfimov;V. Anosov;A. Antoshkin;K. Augsten;W. Augustyniak;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;M. Ball;J. Barth;R. Beck;Y. Bedfer;J. Bernhard;K. Bicker;E. Bielert;R. Birsa;M. Bodlák;P. Bordalo;F. Bradamante;A. Bressan;M. Büchele;W. Chang;C. Chatterjee;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;S. Dalla Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;C. Dreisbach;W. Dünnweber;M. Dziewiecki;A. Efremov;P. Eversheim;M. Faessler;A. Ferrero;M. Finger;H. Fischer;C. Franco;N. du Fresne von Hohenesche;J. Friedrich;V. Frolov;E. Fuchey;F. Gautheron;O. Gavrichtchouk;S. Gerassimov;J. Giarra;F. Giordano;I. Gnesi;M. Gorzellik;A. Grasso;M. Grosse Perdekamp;B. Grube;T. Grussenmeyer;A. Guskov;D. Hahne;G. Hamar;D. von Harrach;F. Heinsius;R. Heitz;F. Herrmann;N. Horikawa;N. d'Hose;C. Hsieh;S. Huber;S. Ishimoto;A. Ivanov;Y. Ivanshin;T. Iwata;V. Jarý;R. Joosten;P. Jörg;E. Kabuß;A. Kerbizi;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;J. Koivuniemi;V. Kolosov;K. Kondo;K. Königsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;Z. Kral;M. Krämer;P. Kremser;F. Krinner;Z. Kroumchtein;Y. Kulinich;F. Kunne;K. Kurek;R. Kurjata;A. Kveton;A. Lednev;M. Levillain;S. Levorato;Y.-S. Lian;J. Lichtenstadt;R. Longo;A. Maggiora;A. Magnon;N. Makins;N. Makke;G. Mallot;B. Mariański;A. Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;M. Meyer;W. Meyer;Y. Mikhailov;M. Mikhasenko;E. Mitrofanov;N. Mitrofanov;Y. Miyachi;A. Nagaytsev;F. Nerling;D. Neyret;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;N. Pierre;S. Platchkov;J. Pochodzalla;V. Polyakov;J. Pretz;M. Quaresma;C. Quintans;S. Ramos;C. Regali;G. Reicherz;C. Riedl;N. Rogacheva;M. Roskot;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;E. Seder;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;J. Smolik;A. Srnka;D. Steffen;M. Stolarski;O. Subrt;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takewaka;M. Tasevsky;S. Tessaro;Gonçalo Terça;F. Tessarotto;A. Thiel;J. Tomsa;F. Tosello;V. Tskhay;S. Uhl;A. Vauth;J. Veloso;M. Virius;M. Vit;J. Vondra;S. Wallner;T. Weisrock;M. Wilfert;J. ter Wolbeek;K. Zaremba;P. Zavada;M. Zavertyaev;E. Zemlyanichkina;N. Zhuravlev;M. Ziembicki
中科院分区：
物理与天体物理1区
文献类型：
--
作者：
M. Aghasyan;R. Akhunzyanov;G. Alexeev;M. Alexeev;A. Amoroso;V. Andrieux;N. Anfimov;V. Anosov;A. Antoshkin;K. Augsten;W. Augustyniak;A. Austregesilo;C. Azevedo;B. Badelek;F. Balestra;M. Ball;J. Barth;R. Beck;Y. Bedfer;J. Bernhard;K. Bicker;E. Bielert;R. Birsa;M. Bodlák;P. Bordalo;F. Bradamante;A. Bressan;M. Büchele;W. Chang;C. Chatterjee;M. Chiosso;I. Choi;S. Chung;A. Cicuttin;M. Crespo;S. Dalla Torre;S. Dasgupta;S. Dasgupta;O. Denisov;L. Dhara;S. Donskov;N. Doshita;C. Dreisbach;W. Dünnweber;M. Dziewiecki;A. Efremov;P. Eversheim;M. Faessler;A. Ferrero;M. Finger;H. Fischer;C. Franco;N. du Fresne von Hohenesche;J. Friedrich;V. Frolov;E. Fuchey;F. Gautheron;O. Gavrichtchouk;S. Gerassimov;J. Giarra;F. Giordano;I. Gnesi;M. Gorzellik;A. Grasso;M. Grosse Perdekamp;B. Grube;T. Grussenmeyer;A. Guskov;D. Hahne;G. Hamar;D. von Harrach;F. Heinsius;R. Heitz;F. Herrmann;N. Horikawa;N. d'Hose;C. Hsieh;S. Huber;S. Ishimoto;A. Ivanov;Y. Ivanshin;T. Iwata;V. Jarý;R. Joosten;P. Jörg;E. Kabuß;A. Kerbizi;B. Ketzer;G. Khaustov;Y. Khokhlov;Y. Kisselev;F. Klein;J. Koivuniemi;V. Kolosov;K. Kondo;K. Königsmann;I. Konorov;V. Konstantinov;A. Kotzinian;O. Kouznetsov;Z. Kral;M. Krämer;P. Kremser;F. Krinner;Z. Kroumchtein;Y. Kulinich;F. Kunne;K. Kurek;R. Kurjata;A. Kveton;A. Lednev;M. Levillain;S. Levorato;Y.-S. Lian;J. Lichtenstadt;R. Longo;A. Maggiora;A. Magnon;N. Makins;N. Makke;G. Mallot;B. Mariański;A. Martin;J. Marzec;J. Matoušek;H. Matsuda;T. Matsuda;G. Meshcheryakov;M. Meyer;W. Meyer;Y. Mikhailov;M. Mikhasenko;E. Mitrofanov;N. Mitrofanov;Y. Miyachi;A. Nagaytsev;F. Nerling;D. Neyret;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;N. Pierre;S. Platchkov;J. Pochodzalla;V. Polyakov;J. Pretz;M. Quaresma;C. Quintans;S. Ramos;C. Regali;G. Reicherz;C. Riedl;N. Rogacheva;M. Roskot;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;E. Seder;A. Selyunin;O. Shevchenko;L. Silva;L. Sinha;S. Sirtl;M. Slunecka;J. Smolik;A. Srnka;D. Steffen;M. Stolarski;O. Subrt;M. Sulc;H. Suzuki;A. Szabelski;T. Szameitat;P. Sznajder;S. Takewaka;M. Tasevsky;S. Tessaro;Gonçalo Terça;F. Tessarotto;A. Thiel;J. Tomsa;F. Tosello;V. Tskhay;S. Uhl;A. Vauth;J. Veloso;M. Virius;M. Vit;J. Vondra;S. Wallner;T. Weisrock;M. Wilfert;J. ter Wolbeek;K. Zaremba;P. Zavada;M. Zavertyaev;E. Zemlyanichkina;N. Zhuravlev;M. Ziembicki

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首次测量了π介子诱导Drell-Yan（DY）过程中与横自旋相关的方位角不对称性。我们使用CERN SPS 190 GeV/c π束和横向极化氨靶。三个方位角的不对称性，让访问不同的横向动量相关（TMD）的部分子分布函数（PDF）提取使用dimuon事件与不变质量之间的4.3 GeV/c2和8.5 GeV/c2。在实验的不确定性，观察到的Sivers不对称性的符号被发现是一致的量子色动力学（QCD）的基本预测，Sivers TMD PDF从DY中提取有一个相反的符号从半包含深非弹性散射（SIDIS）数据中提取。我们提出了两个其他的不对称性起源于π波耳-穆德TMD PDF卷积无论是核子横向或pretzelosity TMD PDF。最近的COMPASS SIDIS测量是在硬尺度上获得的，与这些DY结果相当。这为可能检验基本QCD普适性预言开辟了道路。
The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190 GeV/c π- beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3 GeV/c2 and 8.5 GeV/c2. Within the experimental uncertainties, the observed sign of the Sivers asymmetry is found to be consistent with the fundamental prediction of quantum chromodynamics (QCD) that the Sivers TMD PDFs extracted from DY have a sign opposite to the one extracted from semi-inclusive deep-inelastic scattering (SIDIS) data. We present two other asymmetries originating from the pion Boer-Mulders TMD PDFs convoluted with either the nucleon transversity or pretzelosity TMD PDFs. A recent COMPASS SIDIS measurement was obtained at a hard scale comparable to that of these DY results. This opens the way for possible tests of fundamental QCD universality predictions.