Related papers: Nucleon Transverse Structure at COMPASS

Spin Physics with COMPASS

The recently proposed COMPASS experiment at CERN attempts a measurement of the gluon polarisation with a precision of delta(Delta g/g) = 0.1. The experiment uses open charm muoproduction to tag the photon-gluon fusion process.

High Energy Physics - Experiment · Physics 2007-05-23 Gerhard K. Mallot

Light-Meson Spectroscopy with COMPASS

COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron investigating the structure and spectrum of hadrons. One primary goal is the search for new hadronic states, in particular spin-exotic mesons and…

High Energy Physics - Experiment · Physics 2019-08-14 Boris Grube

COMPASS Calorimetry in view of future plans

The COMPASS experiment at the CERN SPS is dedicated to hadron physics with a broad research programme, including the study of the nucleon spin structure using muons as a probe and a variety of issues in meson spectroscopy using hadron…

Instrumentation and Detectors · Physics 2019-08-14 F. Nerling

Strange-Meson Spectroscopy at COMPASS

COMPASS is a multi-purpose fixed-target experiment at CERN aimed at studying the structure and spectrum of hadrons. It has collected the so far world's largest data set on diffractive production of the $K^-\pi^-\pi^+$ decay, which in…

High Energy Physics - Experiment · Physics 2023-01-03 S. Wallner

Transverse Spin Results From PHENIX

The PHENIX experiment at the Relativistic Heavy Ion Collider explores the spin structure of the proton in polarized p+p collisions at center-of-mass energies up to 500 GeV. Tremendous experimental and theoretical progress has been made…

High Energy Physics - Experiment · Physics 2019-08-13 Feng Wei

Neutron spin structure from polarized deuteron DIS with proton tagging

Polarized electron-deuteron deep-inelastic scattering (DIS) with detection of the spectator proton ("tagged DIS") enables measurements of neutron spin structure with maximal control of nuclear effects. We calculate the longitudinal spin…

High Energy Physics - Phenomenology · Physics 2019-11-15 W. Cosyn , C. Weiss

New target transverse spin dependent azimuthal asymmetries from COMPASS experiment

In general, eight target transverse spin-dependent azimuthal modulations are allowed in semi inclusive deep inelastic scattering of polarized leptons on a transversely polarized target. In the QCD parton model four of these asymmetries can…

High Energy Physics - Experiment · Physics 2015-03-13 Bakur Parsamyan

The COMPASS Setup for Physics with Hadron Beams

The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This setup was designed to perform exclusive measurements of processes with several charged and/or neutral particles in the final state.…

Instrumentation and Detectors · Physics 2015-12-09 Ph. Abbon , C. Adolph , R. Akhunzyanov , Yu. Alexandrov , M. G. Alexeev , G. D. Alexeev , A. Amoroso , V. Andrieux , V. Anosov , A. Austregesilo , B. Badelek , F. Balestra , J. Barth , G. Baum , R. Beck , Y. Bedfer , A. Berlin , J. Bernhard , K. Bicker , E. R. Bielert , J. Bieling , R. Birsa , J. Bisplinghoff , M. Bodlak , M. Boer , P. Bordalo , F. Bradamante , C. Braun , A. Bressan , M. Buechele , E. Burtin , L. Capozza , P. Ciliberti , M. Chiosso , S. U. Chung , A. Cicuttin , M. Colantoni , D. Cotte , M. L. Crespo , Q. Curiel , T. Dafni , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , O. Yu. Denisov , D. Desforge , A. M. Dinkelbach , S. V. Donskov , N. Doshita , V. Duic , W. Duennweber , D. Durand , M. Dziewiecki , A. Efremov , C. Elia , P. D. Eversheim , W. Eyrich , M. Faessler , A. Ferrero , M. Finger , M. Finger , H. Fischer , C. Franco , N. du Fresne von Hohenesche , J. M. Friedrich , V. Frolov , L. Gatignon , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , R. Geyer , A. Giganon , I. Gnesi , B. Gobbo , S. Goertz , M. Gorzellik , S. Grabmueller , A. Grasso , M. Gregori , B. Grube , T. Grussenmeyer , A. Guskov , F. Haas , D. von Harrach , D. Hahne , R. Hashimoto , F. H. Heinsius , F. Herrmann , F. Hinterberger , Ch. Hoeppner , N. Horikawa , N. d'Hose , S. Huber , S. Ishimoto , A. Ivanov , Yu. Ivanshin , T. Iwata , R. Jahn , V. Jary , P. Jasinski , P. Joerg , R. Joosten , E. Kabuss , 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 , R. Kuhn , F. Kunne , K. Kurek , R. P. Kurjata , A. A. Lednev , A. Lehmann , M. Levillain , S. Levorato , J. Lichtenstadt , A. Maggiora , A. Magnon , N. Makke , G. K. Mallot , C. Marchand , J. Marroncle , A. Martin , J. Marzec , J. Matousek , H. Matsuda , T. Matsuda , G. Menon , G. Meshcheryakov , W. Meyer , T. Michigami , Yu. V. Mikhailov , Y. Miyachi , M. A. Moinester , A. Nagaytsev , T. Nagel , F. Nerling , S. Neubert , D. Neyret , V. I. Nikolaenko , J. Novy , W. -D. Nowak , A. S. Nunes , A. G. Olshevsky , I. Orlov , M. Ostrick , R. Panknin , D. Panzieri , B. Parsamyan , S. Paul , G. Pesaro , V. Pesaro , D. V. Peshekhonov , C. Pires , S. Platchkov , J. Pochodzalla , V. A. Polyakov , J. Pretz , M. Quaresma , C. Quintans , S. Ramos , C. Regali , G. Reicherz , J-M. Reymond , E. Rocco , N. S. Rossiyskaya , J. -Y. Rousse , D. I. Ryabchikov , A. Rychter , A. Samartsev , V. D. Samoylenko , A. Sandacz , S. Sarkar , I. A. Savin , G. Sbrizzai , P. Schiavon , C. Schill , T. Schlueter , K. Schmidt , 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 , A. Szabelski , T. Szameitat , P. Sznajder , S. Takekawa , J. ter Wolbeek , S. Tessaro , F. Tessarotto , F. Thibaud , V. Tskhay , S. Uhl , I. Uman , M. Virius , L. Wang , T. Weisrock , Q. Weitzel , M. Wilfert , R. Windmolders , H. Wollny , K. Zaremba , M. Zavertyaev , E. Zemlyanichkina , M. Ziembicki , A. Zink

The COMPASS Event Store in 2002

COMPASS, the fixed-target experiment at CERN studying the structure of the nucleon and spectroscopy, collected over 260 TB during summer 2002 run. All these data, together with reconstructed events information, were put from the beginning…

Databases · Computer Science 2009-11-10 Venicio Duic , Massimo Lamanna

Azimuthal asymmetries in SIDIS off unpolarized targets at COMPASS

Azimuthal asymmetries measured in unpolarized semi-inclusive deep inelastic scattering bring important information on the inner structure of the nucleons, and can be used both to estimate the average quark transverse momentum k_T and to…

High Energy Physics - Experiment · Physics 2019-08-13 Andrea Bressan

High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons

New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the…

High Energy Physics - Experiment · Physics 2024-01-02 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 , J. Barth , R. Beck , J. Beckers , Y. Bedfer , J. Bernhard , M. Bodlak , F. Bradamante , A. Bressan , 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 , F. Delcarro , I. Denisenko , O. Yu. Denisov , S. V. Donskov , N. Doshita , Ch. Dreisbach , W. Dunnweber , R. R. Dusaev , D. Ecker , D. Eremeev , P. Faccioli , M. Faessler , M. Finger , M. Finger , H. Fischer , K. J. Flothner , W. Florian , J. M. Friedrich , V. Frolov , L. G. Garcia Ordonez , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , J. Giarra , D. Giordano , A. Grasso , A. Gridin , M. Grosse Perdekamp , B. Grube , M. Gruner , A. Guskov , P. Haas , D. von Harrach , M. Hoffmann , A. Hoghmrtsyan , N. d'Hose , C. -Y. Hsieh , S. Huber , S. Ishimoto , A. Ivanov , T. Iwata , V. Jary , R. Joosten , E. Kabuss , F. Kaspar , A. Kerbizi , B. Ketzer , A. Khatun , G. V. Khaustov , T. Klasek , F. Klein , J. H. Koivuniemi , V. N. Kolosov , K. Kondo Horikawa , I. Konorov , V. F. Konstantinov , A. Yu. Korzenev , A. M. Kotzinian , O. M. Kouznetsov , A. Koval , Z. Kral , F. Krinner , 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. Makke , G. K. Mallot , A. Maltsev , A. Martin , J. Marzec , J. Matousek , T. Matsuda , G. Mattson , C. Menezes Pires , F. Metzger , M. Meyer , W. Meyer , Yu. V. Mikhailov , M. Mikhasenko , E. Mitrofanov , D. Miura , Y. Miyachi , R. Molina , A. Moretti , A. Movsisyan , A. Nagaytsev , D. Neyret , M. Niemiec , J. Novy , W. -D. Nowak , G. Nukazuka , A. G. Olshevsky , M. Ostrick , D. Panzieri , B. Parsamyan , S. Paul , H. Pekeler , J. -C. Peng , M. Pesek , D. V. Peshekhonov , M. Peskova , S. Platchkov , J. Pochodzalla , V. A. Polyakov , M. Quaresma , C. Quintans , G. Reicherz , C. Riedl , D. I. Ryabchikov , A. Rychter , A. Rymbekova , V. D. Samoylenko , A. Sandacz , S. Sarkar , I. A. Savin , G. Sbrizzai , H. Schmieden , A. Selyunin , K. Sharko , L. Sinha , D. Spulbeck , A. Srnka , M. Stolarski , M. Sulc , H. Suzuki , Y. Takanashi , S. Tessaro , F. Tessarotto , A. Thiel , F. Tosello , A. Townsend , T. Triloki , V. Tskhay , B. Valinoti , B. M. Veit , J. F. C. A. Veloso , B. Ventura , A. Vijayakumar , M. Virius , M. Wagner , S. Wallner , K. Zaremba , M. Zavertyaev , M. Zemko , E. Zemlyanichkina , M. Ziembicki

Exclusively produced rho^0 asymmetries on the deuteron and future GPD measurements at COMPASS

Generalized parton distributions (GPDs) provide a new and powerful framework for a complete description of the nucleon structure. They can provide a three-dimensional picture of how the quarks and gluons form a nucleon. GPDs can be probed…

High Energy Physics - Experiment · Physics 2019-08-13 C. Schill

Transverse momentum dependent multiplicities of hadrons produced in DIS at COMPASS

The COMPASS Collaboration measured the transverse momentum dependent multiplicities of charged hadrons produced in Deep Inelastic Scattering (DIS) off unpolarized protons. Complementing previous COMPASS measurements obtained with an…

High Energy Physics - Experiment · Physics 2019-07-18 Andrea Moretti

Measurement of the longitudinal spin structure of the proton by COMPASS

The inclusive A_1,p and hadron double-spin asymmetries A_p^pi+, A_p^pi-, A_p^K+, A_p^K- measured at COMPASS (CERN SPS) in deep-inelastic scattering of a polarized muon beam off a polarized NH_3 solid target are presented. The results have…

High Energy Physics - Experiment · Physics 2019-08-13 A. Korzenev

Exploring the transverse spin structure of the nucleon

We discuss our present understanding of the transverse spin structure of the nucleon and of related properties originating from parton transverse motion. Starting from the transversity distribution and the ways to access it, we then address…

High Energy Physics - Phenomenology · Physics 2008-11-26 Umberto D'Alesio

Alternative approaches to transversity: how convenient and feasible are they?

The complete knowledge of the nucleon spin structure at leading twist requires also addressing the transverse spin distribution of quarks, or transversity, which is yet unexplored because of its chiral-odd nature. Elaborating strategies to…

High Energy Physics - Phenomenology · Physics 2017-08-23 Marco Radici

SIDIS Asymmetries in Quark-Diquark Model

Some properties of intrinsic transverse momentum dependent nucleon distribution functions are considered in the simple quark-diquark model. The transverse target polarization dependent asymmetries for SIDIS are calculated and compared with…

High Energy Physics - Phenomenology · Physics 2017-08-23 Aram Kotzinian

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

Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p$^\uparrow$+p collisions at $\sqrt{s}$ = 500 GeV

The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing…

High Energy Physics - Experiment · Physics 2018-03-16 STAR Collaboration , L. Adamczyk , J. R. Adams , J. K. Adkins , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , N. N. Ajitanand , I. Alekseev , D. M. Anderson , R. Aoyama , A. Aparin , D. Arkhipkin , E. C. Aschenauer , M. U. Ashraf , A. Attri , G. S. Averichev , X. Bai , V. Bairathi , K. Barish , A. Behera , R. Bellwied , A. Bhasin , A. K. Bhati , P. Bhattarai , J. Bielcik , J. Bielcikova , L. C. Bland , I. G. Bordyuzhin , J. Bouchet , J. D. Brandenburg , A. V. Brandin , D. Brown , J. Bryslawskyj , I. Bunzarov , J. Butterworth , H. Caines , M. Calderón de la Barca Sánchez , J. M. Campbell , D. Cebra , I. Chakaberia , P. Chaloupka , Z. Chang , N. Chankova-Bunzarova , A. Chatterjee , S. Chattopadhyay , X. Chen , J. H. Chen , X. Chen , J. Cheng , M. Cherney , W. Christie , G. Contin , H. J. Crawford , S. Das , T. G. Dedovich , J. Deng , I. M. Deppner , A. A. Derevschikov , L. Didenko , C. Dilks , X. Dong , J. L. Drachenberg , J. E. Draper , J. C. Dunlop , L. G. Efimov , N. Elsey , J. Engelage , G. Eppley , R. Esha , S. Esumi , O. Evdokimov , J. Ewigleben , O. Eyser , R. Fatemi , S. Fazio , P. Federic , P. Federicova , J. Fedorisin , Z. Feng , P. Filip , E. Finch , Y. Fisyak , C. E. Flores , J. Fujita , L. Fulek , C. A. Gagliardi , F. Geurts , A. Gibson , M. Girard , D. Grosnick , D. S. Gunarathne , Y. Guo , A. Gupta , W. Guryn , A. I. Hamad , A. Hamed , A. Harlenderova , J. W. Harris , L. He , S. Heppelmann , S. Heppelmann , N. Herrmann , A. Hirsch , S. Horvat , X. Huang , H. Z. Huang , T. Huang , B. Huang , T. J. Humanic , P. Huo , G. Igo , W. W. Jacobs , A. Jentsch , J. Jia , K. Jiang , S. Jowzaee , E. G. Judd , S. Kabana , D. Kalinkin , K. Kang , D. Kapukchyan , K. Kauder , H. W. Ke , D. Keane , A. Kechechyan , Z. Khan , D. P. Kikoła , C. Kim , I. Kisel , A. Kisiel , L. Kochenda , M. Kocmanek , T. Kollegger , L. K. Kosarzewski , A. F. Kraishan , L. Krauth , P. Kravtsov , K. Krueger , N. Kulathunga , L. Kumar , J. Kvapil , J. H. Kwasizur , R. Lacey , J. M. Landgraf , K. D. Landry , J. Lauret , A. Lebedev , R. Lednicky , J. H. Lee , W. Li , C. Li , X. Li , Y. Li , J. Lidrych , T. Lin , M. A. Lisa , F. Liu , P. Liu , Y. Liu , H. Liu , T. Ljubicic , W. J. Llope , M. Lomnitz , R. S. Longacre , S. Luo , X. Luo , G. L. Ma , R. Ma , Y. G. Ma , L. Ma , N. Magdy , R. Majka , D. Mallick , S. Margetis , C. Markert , H. S. Matis , D. Mayes , K. Meehan , J. C. Mei , Z. W. Miller , N. G. Minaev , S. Mioduszewski , D. Mishra , S. Mizuno , B. Mohanty , M. M. Mondal , D. A. Morozov , M. K. Mustafa , Md. Nasim , T. K. Nayak , J. M. Nelson , D. B. Nemes , M. Nie , G. Nigmatkulov , T. Niida , L. V. Nogach , T. Nonaka , S. B. Nurushev , G. Odyniec , A. Ogawa , K. Oh , V. A. Okorokov , D. Olvitt , B. S. Page , R. Pak , Y. Pandit , Y. Panebratsev , B. Pawlik , H. Pei , C. Perkins , J. Pluta , K. Poniatowska , J. Porter , M. Posik , N. K. Pruthi , M. Przybycien , J. Putschke , A. Quintero , S. Ramachandran , R. L. Ray , R. Reed , M. J. Rehbein , H. G. Ritter , J. B. Roberts , O. V. Rogachevskiy , J. L. Romero , J. D. Roth , L. Ruan , J. Rusnak , O. Rusnakova , N. R. Sahoo , P. K. Sahu , S. Salur , J. Sandweiss , M. Saur , J. Schambach , A. M. Schmah , W. B. Schmidke , N. Schmitz , B. R. Schweid , J. Seger , M. Sergeeva , R. Seto , P. Seyboth , N. Shah , E. Shahaliev , P. V. Shanmuganathan , M. Shao , W. Q. Shen , S. S. Shi , Z. Shi , Q. Y. Shou , E. P. Sichtermann , R. Sikora , M. Simko , S. Singha , M. J. Skoby , N. Smirnov , D. Smirnov , W. Solyst , P. Sorensen , H. M. Spinka , B. Srivastava , T. D. S. Stanislaus , D. J. Stewart , M. Strikhanov , B. Stringfellow , A. A. P. Suaide , T. Sugiura , M. Sumbera , B. Summa , X. Sun , Y. Sun , X. M. Sun , B. Surrow , D. N. Svirida , Z. Tang , A. H. Tang , A. Taranenko , T. Tarnowsky , A. Tawfik , J. Thäder , J. H. Thomas , A. R. Timmins , D. Tlusty , T. Todoroki , M. Tokarev , S. Trentalange , R. E. Tribble , P. Tribedy , S. K. Tripathy , B. A. Trzeciak , O. D. Tsai , B. Tu , T. Ullrich , D. G. Underwood , I. Upsal , G. Van Buren , G. van Nieuwenhuizen , A. N. Vasiliev , F. Videbæk , S. Vokal , S. A. Voloshin , A. Vossen , G. Wang , F. Wang , Y. Wang , Y. Wang , G. Webb , J. C. Webb , L. Wen , G. D. Westfall , H. Wieman , S. W. Wissink , R. Witt , Y. Wu , Z. G. Xiao , G. Xie , W. Xie , Q. H. Xu , Y. F. Xu , J. Xu , N. Xu , Z. Xu , C. Yang , S. Yang , Q. Yang , Y. Yang , Z. Ye , Z. Ye , L. Yi , K. Yip , I. -K. Yoo , N. Yu , H. Zbroszczyk , W. Zha , J. B. Zhang , J. Zhang , S. Zhang , L. Zhang , J. Zhang , X. P. Zhang , Z. Zhang , S. Zhang , Y. Zhang , J. Zhao , C. Zhong , C. Zhou , L. Zhou , X. Zhu , Z. Zhu , M. Zyzak

Partial-Wave Analysis of the Centrally Produced {\pi}+{\pi}- System in pp Reactions at COMPASS

COMPASS is a fixed-target experiment at CERN SPS which investigates the structure and spectroscopy of hadrons. During nine weeks in 2008 and 2009, a 190 GeV/c proton beam impinging on a liquid hydrogen target was used in order to study the…

High Energy Physics - Experiment · Physics 2019-08-13 A. Austregesilo , T. Schlueter