Related papers: Transversity signals at COMPASS

COMPASS measurement of the $P_T$ weighted Sivers asymmetry

The SIDIS transverse spin asymmetries weighted with powers of $P_T$, the hadron transverse momentum in the $\gamma N$ reference system,have been introduced already twenty years ago and are considered quite interesting. While the amplitudes…

High Energy Physics - Experiment · Physics 2017-02-03 Franco Bradamante

Dihadron Transverse-Spin Asymmetries in Muon-Deuteron Deep-Inelastic Scattering

In 2022, the COMPASS collaboration performed semi-inclusive measurements of deep-inelastic muon-scattering on a transversely polarised deuteron (6LiD) target. From these data, transverse-spin-dependent dihadron asymmetries are extracted…

High Energy Physics - Experiment · Physics 2025-12-30 G. D. Alexeev , M. G. Alexeev , C. Alice , A. Amoroso , V. Andrieux , V. Anosov , S. Asatryan , K. Augsten , W. Augustyniak , C. D. R. Azevedo , B. Badelek , R. Beck , J. Beckers , Y. Bedfer , V. Benesova , J. Bernhard , F. Bradamante , A. Bressan , W. -C . Chang , C. Chatterjee , M. Chiosso , S. -U. Chung , A. Cicuttin , M. L. Crespo , D. D'Ago , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , M. Dehpour , F. Delcarro , I. Denisenko , O. Yu. Denisov , S. V. Donskov , N. Doshita , Ch. Dreisbach , W. Dün nweber , R. R. Dusaev , D. Ecker , P. Faccioli , M. Faessler , M. Finger , M. Finger , H. Fischer , K. J. Flöthner , W. Florian , J. M. Friedrich , V. Frolov , L. G. Garcia Ordòñez , O. P. Gavrichtchouk , S. Gerassimov , J. Giarra , D. Giordan o , A. Grasso , A. Gridin , M. Grosse Perdekamp , B. Grube , M. Grüner , A. Guskov , P. Haas , D. von Harrach , M. Hoffmann , A. Hoghmrtsyan , N. d'Hose , C. -Y. Hsieh , S. Ishimoto , A. Ivanov , T. Iwata , V. Jary , E. Jelinkova , R. Joosten , E. Kabuß , F. Kaspar , A. Kerbizi , B. Ketzer , G. V. Khaustov , T. Klasek , J. H. Koivuniemi , V. N. Kolosov , K. Kondo Horikawa , I. Konorov , A. Yu. Korzenev , A. M. Kotzinian , O. M. Kouznetsov , A. Koval , F. Kunne , K. Kurek , R. P. Kurjata , A. Kveton , K. Lavickova , S. Levorato , Y. -S. Lian , J. Lichtenstadt , P. -J. Lin , R. Longo , V. E. Lyubovitskij , A. Maggiora , N. Makke , G. K. Mallot , A. Maltsev , A. Martin , H. Marukyan , J. Marzec , J. Matoušek , T. Matsuda , C. Menezes Pires , F. Metzge r , W. Meyer , M. Mikhasenko , E. Mitrofanov , D. Miura , Y. Miyachi , R. Molina , A. Movsisian , A. Moretti , A. Nagaytsev , D. Neyret , M. Niemiec , J. Nový , W. -D. Nowak , G. Nukazuka , A. G. Olshevsky , M. Ostrick , D. Panzieri , B. Parsamyan , S. P aul , H. Pekeler , J. -C. Peng , M. Pešek , D. V. Peshekhonov , M. Pešková , S. Platchkov , J. Pochodzalla , V. A. Polyakov , P. Pucci , C. Quintans , G. Reicherz , C. Riedl , D. I. Ryabchikov , A. Rychter , A. Rymbekova , V. D. Samoylenko , A. S andacz , S. Sarkar , I. A. Savin , G. Sbrizzai , H. Schmieden , A. Selyunin , S. Seriubin , L. Sinha , D. Spülbeck , A. Srnka , M. Stolarski , M. Sulc , H. Suzuki , S. Tessaro , F. Tessarotto , A. Thiel , F. Tosello , A. Townsend , V. Tskhay , B. Valino ti , B. M. Veit , J. F. C. A. Veloso , A. Vijayakumar , M. Virius , M. Wagner , S. Wallner , K. Zaremba , M. Zavertyaev , M. Zemko , E. Zemlyanichkina , M. Ziembicki

Beyond Collins and Sivers: further measurements of the target transverse spin-dependent azimuthal asymmetries in semi-inclusive DIS from COMPASS

In semi-inclusive DIS of polarized leptons on a transversely polarized target eight azimuthal modulations appear in the cross-section. Within QCD parton model four azimuthal asymmetries can be interpreted at leading order, two of them being…

High Energy Physics - Experiment · Physics 2007-05-23 Aram Kotzinian

Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering

First measurements of azimuthal asymmetries in hadron-pair production in deep-inelastic scattering of muons on transversely polarised ^6LiD (deuteron) and NH_3 (proton) targets are presented. The data were taken in the years 2002-2004 and…

High Energy Physics - Experiment · Physics 2012-06-04 C. Adolph , M. G. Alekseev , V. Yu. Alexakhin , Yu. Alexandrov , G. D. Alexeev , A. Amoroso , A. A. Antonov , A. Austregesilo , B. Badellek , F. Balestra , J. Barth , G. Baum , Y. Bedfer , J. Bernhard , R. Bertini , M. Bettinelli , K. Bicker , J. Bieling , R. Birsa , J. Bisplinghoff , P. Bordalo , F. Bradamante , C. Braun , A. Bravar , A. Bressan , E. Burtin , D. Chaberny , M. Chiosso , S. U. Chung , A. Cicuttin , M. L. Crespo , S. Dalla Torre , S. Das , S. S. Dasgupta , O. Yu. Denisov , L. Dhara , S. V. Donskov , N. Doshita , V. Duic , W. Duennweber , M. Dziewiecki , A. Efremov , C. Elia , P. D. Eversheim , W. Eyrich , M. Faessler , A. Ferrero , A. Filin , M. Finger , M. Finger , H. Fischer , C. Franco , N. du Fresne von Hohenesche , J. M. Friedrich , R. Garfagnini , F. Gautheron , O. P. Gavrichtchouk , R. Gazda , S. Gerassimov , R. Geyer , M. Giorgi , I. Gnesi , B. Gobbo , S. Goertz , S. Grabmueller , A. Grasso , B. Grube , R. Gushterski , A. Guskov , T. Guthoerl , F. Haas , D. von Harrach , F. H. Heinsius , F. Herrmann , C. Hess , F. Hinterberger , N. Horikawa , Ch. Hoeppner , N. d'Hose , S. Huber , S. Ishimoto , O. Ivanov , Yu. Ivanshin , T. Iwata , R. Jahn , P. Jasinski , R. Joosten , E. Kabuss , D. Kang , B. Ketzer , G. V. Khaustov , Yu. A. Khokhlov , Yu. Kisselev , F. Klein , K. Klimaszewski , S. Koblitz , J. H. Koivuniemi , V. N. Kolosov , K. Kondo , K. Koenigsmann , I. Konorov , V. F. Konstantinov , A. Korzenev , A. M. Kotzinian , O. Kouznetsov , M. Kraemer , Z. V. Kroumchtein , F. Kunne , K. Kurek , L. Lauser , A. A. Lednev , A. Lehmann , S. Levorato , J. Lichtenstadt , A. Maggiora , A. Magnon , N. Makke , G. K. Mallot , A. Mann , C. Marchand , A. Martin , J. Marzec , F. Massmann , T. Matsuda , W. Meyer , T. Michigami , A. Mielech , Yu. V. Mikhailov , M. A. Moinester , A. Morreale , A. Mutter , A. Nagaytsev , T. Nagel , T. Negrini , F. Nerling , S. Neubert , D. Neyret , V. I. Nikolaenko , W. D. Nowak , A. S. Nunes , A. G. Olshevsky , M. Ostrick , A. Padee , R. Panknin , D. Panzieri , B. Parsamyan , S. Paul , E. Perevalova , G. Pesaro , D. V. Peshekhonov , G. Piragino , S. Platchkov , J. Pochodzalla , J. Polak , V. A. Polyakov , G. Pontecorvo , J. Pretz , M. Quaresma , C. Quintans , J. -F. Rajotte , S. Ramos , V. Rapatsky , G. Reicherz , A. Richter , E. Rocco , E. Rondio , N. S. Rossiyskaya , D. I. Ryabchikov , V. D. Samoylenko , A. Sandacz , M. G. Sapozhnikov , S. Sarkar , I. A. Savin , G. Sbrizzai , P. Schiavon , C. Schill , T. Schlueter , K. Schmidt , L. Schmitt , K. Schoenning , S. Schopferer , M. Schott , O. Yu. Shevchenko , L. Silva , L. Sinha , A. N. Sissakian , M. Slunecka , G. I. Smirnov , S. Sosio , F. Sozzi , A. Srnka , M. Stolarski , M. Sulc , R. Sulej , P. Sznajder , S. Takekawa , J. Ter Wolbeek , S. Tessaro , F. Tessarotto , L. G. Tkatchev , S. Uhl , I. Uman , M. Vandenbroucke , M. Virius , N. V. Vlassov , A. Vossen , L. Wang , R. Windmolders , W. Wislicki , H. Wollny , K. Zaremba , M. Zavertyaev , E. Zemlyanichkina , M. Ziembicki , N. Zhuravlevd , A. Zvyagin

Transverse Target Spin asymmetries in exclusive $\rho^0$ muoproduction

Generalized Parton Distributions (GPDs) provide a dynamical picture of the nucleon. The exclusive production of $\rho^0$ mesons on a transversely polarised target is sensitive to the nucleon helicity-flip GPDs $E$ which are related to the…

High Energy Physics - Experiment · Physics 2015-06-17 Katharina Schmidt

Probing transversity by measuring $\Lambda$ polarisation in SIDIS

Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution…

High Energy Physics - Experiment · Physics 2021-12-15 M. G. Alexeev , G. D. Alexeev , A. Amoroso , V. Andrieux , V. Anosov , K. Augsten , W. Augustyniak , C. D. R. Azevedo , B. Badelek , F. Balestra , M. Ball , J. Barth , R. Beck , Y. Bedfer , J. Berenguer Antequera , J. Bernhard , M. Bodlak , F. Bradamante , A. Bressan , V. E. Burtsev , W. -C. Chang , C. Chatterjee , M. Chiosso , A. G. Chumakov , S. -U. Chung , A. Cicuttin , P. M. M. Correia , M. L. Crespo , D. D'Ago , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , I. Denisenko , O. Yu. Denisov , S. V. Donskov , N. Doshita , Ch. Dreisbach , W. Duennweber , R. R. Dusaev , A. Efremov , P. D. Eversheim , P. Faccioli , M. Faessler , A. Ferrero , M. Finger , M. Finger , H. Fischer , C. Franco , J. M. Friedrich , V. Frolov , L. G. Garcia Ordonez , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , J. Giarra , I. Gnesi , D. Giordano , M. Gorzellik , A. Grasso , A. Gridin , M. Grosse Perdekamp , B. Grube , A. Guskov , D. von Harrach , R. Heitz , N. Horikawa , N. d'Hose , C. -Y. Hsieh , S. Huber , S. Ishimoto , A. Ivanov , T. Iwata , M. Jandek , T. Jary , R. Joosten , E. Kabuss , D. H. Kang , F. Kaspar , A. Kerbizi , B. Ketzer , G. V. Khaustov , Yu. A. Khokhlov , Yu. Kisselev , F. Klein , J. H. Koivuniemi , V. N. Kolosov , I. Konorov , V. F. Konstantinov , A. M. Kotzinian , O. M. Kouznetsov , A. Koval , Z. Kral , F. Krinner , Y. Kulinich , F. Kunne , K. Kurek , R. P. Kurjata , A. Kveton , K. Lavickova , S. Levorato , Y. -S. Lian , J. Lichtenstadt , P. -J. Lin , R. Longo , V. E. Lyubovitskij , A. Maggiora , A. Magnon , N. Makins , N. Makke , G. K. Mallot , A. Maltsev , S. A. Mamon , B. Marianski , A. Martin , J. Marzec , J. Matousek , T. Matsuda , G. Mattson , G. V. Meshcheryakov , M. Meyer , W. Meyer , Yu. V. Mikhailov , M. Mikhasenko , E. Mitrofanov , Y. Miyachi , A. Moretti , A. Nagaytsev , C. Naim , T. S. Negrini , D. Neyret , J. Novy , W. -D. Nowak , G. Nukazuka , A. S. Nunes , A. G. Olshevskiy , M. Ostrick , D. Panzieri , B. Parsamyan , S. Paul , H. Pekeler , J. -C. Peng , M. Pesek , D. V. Peshekhonov , M. Peskova , N. Pierre , S. Platchkov , J. Pochodzalla , V. A. Polyakov , J. Pretz , M. Quaresma , C. Quintans , G. Reicherz , C. Riedl , T. Rudnicki , D. I. Ryabchikov , A. Rymbekova , A. Rychter , V. D. Samoylenko , A. Sandacz , S. Sarkar , I. A. Savin , G. Sbrizzai , P. Schiavon , H. Schmieden , A. Selyunin , K. Sharko , L. Sinha , M. Slunecka , J. Smolik , F. Sozzi , A. Srnka , D. Steffen , M. Stolarski , O. Subrt , M. Sulc , H. Suzuki , P. Sznajder , S. Tessaro , F. Tessarotto , A. Thiel , J. Tomsa , F. Tosello , A. Townsend , V. Tskhay , S. Uhl , A. Vauth , B. M. Veit , J. Veloso , B. Ventura , A. Vidon , M. Virius , M. Wagner , S. Wallner , K. Zaremba , P. Zavada , M. Zavertyaev , M. Zemko , E. Zemlyanichkina , Y. Zhao , M. Ziembicki

Neutron Transversity at Jefferson Lab

Nucleon transversity and single transverse spin asymmetries have been the recent focus of large efforts by both theorists and experimentalists. On-going and planned experiments from HERMES, COMPASS and RHIC are mostly on the proton or the…

Nuclear Experiment · Physics 2017-08-23 J. P. Chen , X. Jiang , J. -C. Peng , L. Zhu , for JLab Hall A Collaboration

SIDIS transverse spin azimuthal asymmetries at COMPASS: Multidimensional analysis

Exploration of transverse spin structure of the nucleon via study of the spin (in)dependent azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS) and Drell-Yan (DY) reactions is one of the main aspects of the broad…

High Energy Physics - Experiment · Physics 2015-12-23 Bakur Parsamyan

First Measurement of the Transverse Spin Asymmetries of the Deuteron in Semi-Inclusive Deep Inelastic Scattering

First measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarized 6-LiD target are presented. The data were taken in 2002 with the COMPASS spectrometer…

High Energy Physics - Experiment · Physics 2012-08-27 The COMPASS Collaboration

Hard Exclusive \rho^0-Meson Production at COMPASS

New results for the transverse target spin azimuthal asymmetry A_{UT}^{sin(\phi-\phi_S)} for hard exclusive \rho^0-meson production on a transversely polarised ^6LiD and NH_3 target will be presented. The measurement was performed with the…

High Energy Physics - Experiment · Physics 2019-08-14 H. Wollny

Polarized Drell-Yan at COMPASS-II: Transverse Spin Physics Program

Successful realization of polarized Drell-Yan physics program is one of the main goals of the second stage of the COMPASS experiment. Drell-Yan measurements with high energy (190 GeV/c) pion beam and transversely polarized NH3 target have…

High Energy Physics - Experiment · Physics 2016-03-23 Bakur Parsamyan

Future Programme of COMPASS at CERN

COMPASS at CERN is preparing for a new series of measurements on the nucleon structure comprising deep virtual Compton scattering and hard exclusive meson production using muon beams, as well as Drell-Yan reactions using a polarised proton…

High Energy Physics - Experiment · Physics 2012-06-14 Gerhard K. Mallot

Transverse target spin asymmetries in exclusive $\rho^0$ muoproduction

Exclusive production of $\rho^0$ mesons was studied at the COMPASS experiment by scattering 160 GeV/$c$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of…

High Energy Physics - Experiment · Physics 2015-06-17 C. Adolph , M. G. Alekseev , V. Yu. Alexakhin , Yu. Alexandrov , G. D. Alexeev , A. Amoroso , V. Andrieux , A. Austregesilo , B. Badellek , F. Balestra , J. Barth , G. Baum , Y. Bedfer , A. Berlin , J. Bernhard , R. Bertini , K. Bicker , J. Bieling , R. Birsa , J. Bisplinghoff , M. Boer , P. Bordalo , F. Bradamante , C. Braun , A. Bravar , A. Bressan , M. Buechele , E. Burtin , L. Capozza , M. Chiosso , S. U. Chung , A. Cicuttin , M. L. Crespo , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , O. Yu. Denisov , S. V. Donskov , N. Doshita , V. Duic , W. Duennweber , M. Dziewiecki , A. Efremov , C. Elia , P. D. Eversheim , W. Eyrich , M. Faessler , A. Ferrero , A. Filin , M. Finger , M. Finger , H. Fischer , C. Franco , N. du Fresne von Hohenesche , J. M. Friedrich , V. Frolov , R. Garfagnini , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , R. Geyer , M. Giorgi , I. Gnesi , B. Gobbo , S. Goertz , S. Grabmueller , A. Grasso , B. Grube , R. Gushterski , A. Guskov , T. Guthoerl , F. Haas , D. von Harrach , D. Hahne , F. H. Heinsius , F. Herrmann , C. Hess , F. Hinterberger , Ch. Hoeppner , N. Horikawa , N. d'Hose , S. Huber , S. Ishimoto , Yu. Ivanshin , T. Iwata , R. Jahn , V. Jary , P. Jasinski , R. Joosten , E. Kabuss , D. Kang , B. Ketzer , G. V. Khaustov , Yu. A. Khokhlov , Yu. Kisselev , F. Klein , K. Klimaszewski , J. H. Koivuniemi , V. N. Kolosov , K. Kondo , K. Koenigsmann , I. Konorov , V. F. Konstantinov , A. M. Kotzinian , O. Kouznetsov , M. Kraemer , Z. V. Kroumchtein , N. Kuchinski , F. Kunne , K. Kurek , R. P. Kurjata , A. A. Lednev , A. Lehmann , S. Levorato , J. Lichtenstadt , A. Maggiora , A. Magnon , N. Makke , G. K. Mallot , C. Marchand , A. Martin , J. Marzec , J. Matousek , H. Matsuda , T. Matsuda , G. Meshcheryakov , W. Meyer , T. Michigami , Yu. V. Mikhailov , Y. Miyachi , A. Morreale , A. Nagaytsev , T. Nagel , F. Nerling , S. Neubert , D. Neyret , V. I. Nikolaenko , J. Novy , W. -D. Nowak , A. S. Nunes , A. G. Olshevsky , M. Ostrick , R. Panknin , D. Panzieri , B. Parsamyan , S. Paul , M. Pesek , G. Piragino , S. Platchkov , J. Pochodzalla , J. Polak , V. A. Polyakov , J. Pretz , M. Quaresma , C. Quintans , S. Ramos , G. Reicherz , E. Rocco , V. Rodionov , E. Rondio , N. S. Rossiyskaya , D. I. Ryabchikov , V. D. Samoylenko , A. Sandacz , M. G. Sapozhnikov , S. Sarkar , I. A. Savin , G. Sbrizzai , P. Schiavon , C. Schill , T. Schlueter , A. Schmidt , K. Schmidt , L. Schmitt , H. Schmieden , K. Schoenning , S. Schopferer , M. Schott , O. Yu. Shevchenko , L. Silva , L. Sinha , S. Sirtl , M. Slunecka , S. Sosio , F. Sozzi , A. Srnka , L. Steiger , M. Stolarski , M. Sulc , R. Sulej , H. Suzuki , P. Sznajder , S. Takekawa , J. Ter Wolbeek , S. Tessaro , F. Tessarotto , F. Thibaud , S. Uhl , I. Uman , M. Vandenbroucke , M. Virius , J. Vondra , L. Wang , T. Weisrock , M. Wilfert , R. Windmolders , W. Wislicki , H. Wollny , K. Zaremba , M. Zavertyaev , E. Zemlyanichkina , N. Zhuravlev , M. Ziembicki

Measurement of longitudinal-target-polarization dependent azimuthal asymmetries in SIDIS at COMPASS experiment

Preliminary results obtained by the COMPASS experiment for longitudinal-spin-dependent azimuthal asymmetries in single-hadron muoproduction off protons are presented for the first time. The analysis was carried out on the full data sample…

High Energy Physics - Experiment · Physics 2018-01-08 Bakur Parsamyan

Polarised Drell-Yan results from COMPASS

The COMPASS experiment at CERN is one of the leading experiments studying the nucleon spin structure. Until 2012 the Parton Distribution Functions and the Transverse Momentum Dependent Parton Distribution Functions (TMDs) were extensively…

High Energy Physics - Experiment · Physics 2018-04-26 Celso Franco

Highlights from the COMPASS experiment at CERN -- Hadron spectroscopy and excitations

The COMPASS experiment at the CERN-SPS studies the spectrum and the structure of hadrons by scattering high energy hadrons and polarised muons off various fixed targets. Recent results for the hadron programme comprise highlights from…

High Energy Physics - Experiment · Physics 2016-11-23 Frank Nerling

New measurement of DeltaG/G at COMPASS

One of the main goals of the COMPASS experiment at CERN is the determination of the gluon polarisation in the nucleon, DeltaG/G. It is extracted from the spin asymmetry in the scattering of a polarized 160 GeV muon beam on a polarized LiD…

High Energy Physics - Experiment · Physics 2007-05-23 S. Procureur

The GPD program at COMPASS

The 160 GeV polarised muon beam available at CERN, with positive or negative charge, makes COMPASS a unique place for GPD studies. The first GPD related COMPASS results come from exclusive vector meson production on transversely polarised…

High Energy Physics - Experiment · Physics 2015-09-28 Andrzej Sandacz

\Delta G/G results from the COMPASS experiment for Q^2 > 1 GeV^2, using high p_T hadrons

One of the goals of COMPASS experiment is the determination of the gluon polarisation, \Delta G/G, for a deep understanding of the spin structure of the nucleon. The gluon polarisation can be measured via the Photon-Gluon-Fusion (PGF)…

High Energy Physics - Experiment · Physics 2019-08-13 Luís Silva

Transversity and Spin Structure Functions

Measurements of single-spin asymmetries for semi-inclusive electro-production of pions and kaons in deep-inelastic scattering with transverse target polarization open a new window on the transverse quark and gluon structure of the nucleon.…

High Energy Physics - Experiment · Physics 2007-05-23 H. E. Jackson