Related papers: The COMPASS spin physics program

Hadron Spectroscopy in COMPASS

The COmmon Muon and Proton Apparatus for Structure and Spectroscopy (COMPASS) is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron (SPS) aimed at studying the structure and spectrum of hadrons. In the naive…

High Energy Physics - Experiment · Physics 2019-08-13 Boris Grube

First measurement of the Sivers asymmetry for gluons from SIDIS data

The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. It was extracted from measurements of the azimuthal asymmetry of hadrons produced in semi-inclusive deep…

High Energy Physics - Experiment · Physics 2017-09-13 C. Adolph , M. Aghasyan , R. Akhunzyanov , M. G. Alexeev , G. D. Alexeev , A. Amoroso , V. Andrieux , N. V. Anfimov , V. Anosov , A. Antoshkin , K. Augsten , W. Augustyniak , A. Austregesilo , C. D. R. Azevedo , B. Badelek , F. Balestra , M. Ball , J. Barth , R. Beck , Y. Bedfer , J. Bernhard , K. Bicker , E. R. Bielert , R. Birsa , M. Bodlak , P. Bordalo , F. Bradamante , C. Braun , A. Bressan , M. Buechele , W. -C. Chang , C. Chatterjee , M. Chiosso , I. Choi , S. -U. Chung , A. Cicuttin , M. L. Crespo , Q. Curiel , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , O. Yu. Denisov , L. Dhara , S. V. Donskov , N. Doshita , Ch. Dreisbach , V. Duic , W. Duennweber , M. Dziewiecki , A. Efremov , 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 , E. Fuchey , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , J. Giarra , F. Giordano , I. Gnesi , M. Gorzellik , S. Grabmueller , A. Grasso , M. Grosse Perdekamp , B. Grube , T. Grussenmeyer , A. Guskov , F. Haas , D. Hahne , G. Hamar , D. von Harrach , F. H. Heinsius , R. Heitz , F. Herrmann , N. Horikawa , N. d'Hose , C. -Y. Hsieh , S. Huber , S. Ishimoto , A. Ivanov , Yu. Ivanshin , T. Iwata , V. Jary , R. Joosten , P. Joerg , E. Kabuss , A. Kerbizi , 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. M. Kouznetsov , M. Kraemer , P. Kremser , F. Krinner , Z. V. Kroumchtein , Y. Kulinich , F. Kunne , K. Kurek , R. P. Kurjata , A. A. Lednev , A. Lehmann , M. Levillain , S. Levorato , Y. -S. Lian , J. Lichtenstadt , R. Longo , A. Maggiora , A. Magnon , N. Makins , N. Makke , G. K. Mallot , B. Marianski , A. Martin , J. Marzec , J. Matousek , H. Matsuda , T. Matsuda , G. V. Meshcheryakov , M. Meyer , W. Meyer , Yu. V. Mikhailov , M. Mikhasenko , E. Mitrofanov , N. Mitrofanov , Y. Miyachi , A. Nagaytsev , F. Nerling , D. Neyret , J. Novy , W. -D. Nowak , G. Nukazuka , A. S. Nunes , A. G. Olshevsky , I. Orlov , M. Ostrick , D. Panzieri , B. Parsamyan , S. Paul , J. -C. Peng , F. Pereira , M. Pesek , D. V. Peshekhonov , N. Pierre , S. Platchkov , J. Pochodzalla , V. A. Polyakov , J. Pretz , M. Quaresma , C. Quintans , S. Ramos , C. Regali , G. Reicherz , C. Riedl , N. S. Rogacheva , M. Roskot , D. I. Ryabchikov , A. Rybnikov , A. Rychter , R. Salac , V. D. Samoylenko , A. Sandacz , C. Santos , S. Sarkar , I. A. Savin , T. Sawada , G. Sbrizzai , P. Schiavon , K. Schmidt , H. Schmieden , K. Schoenning , E. Seder , A. Selyunin , 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. Takekawa , M. Tasevsky , S. Tessaro , F. Tessarotto , F. Thibaud , A. Thiel , F. Tosello , V. Tskhay , S. Uhl , J. Veloso , M. Virius , J. Vondra , S. Wallner , T. Weisrock , M. Wilfert , J. ter Wolbeek , K. Zaremba , P. Zavada , M. Zavertyaev , E. Zemlyanichkina , N. Zhuravlev , M. Ziembicki , A. Zink

Conceptual design of the Spin Physics Detector

The Spin Physics Detector, a universal facility for studying the nucleon spin structure and other spin-related phenomena with polarized proton and deuteron beams, is proposed to be placed in one of the two interaction points of the NICA…

High Energy Physics - Experiment · Physics 2022-02-04 V. M. Abazov , V. Abramov , L. G. Afanasyev , R. R. Akhunzyanov , A. V. Akindinov , N. Akopov , I. G. Alekseev , A. M. Aleshko , V. Yu. Alexakhin , G. D. Alexeev , M. Alexeev , A. Amoroso , I. V. Anikin , V. F. Andreev , V. A. Anosov , A. B. Arbuzov , N. I. Azorskiy , A. A. Baldin , V. V. Balandina , E. G. Baldina , M. Yu. Barabanov , S. G. Barsov , V. A. Baskov , A. N. Beloborodov , I. N. Belov , A. P. Belova , A. V. Belyaev , A. Ya. Berdnikov , Ya. A. Berdnikov , A. V. Berezhnoy , V. V. Bleko , A. V. Bobkov , D. N. Bogoslovsky , I. N. Boguslavsky , E. V. Boltushkin , E. E. Boos , V. E. Burtsev , Lei Chen , A. S. Chepurnov , M. Chiosso , A. Chumakov , O. D. Dalkarov , A. Datta , E. I. Demikhov , I. I. Denisenko , O. Yu. Denisov , V. N. Duginov , V. B. Dunin , K. Dygnarowicz , A. V. Efremov , R. El-Kholy , D. A. Eliseev , T. L. Enik , O. L. Fedin , G. A. Feofilov , Yu. N. Filatov , M. Finger , M. Finger , V. N. Frolov , G. Galinski , A. S. Galoyan , C. E Garsia Trapaga , O. P. Gavrishchuk , S. G. Gerasimov , L. Glonti , S. V. Goloskokov , G. A. Golovanov , A. A. Golubev , Golubykh S. M. , Goncharov P. V. , Grafov N. O. , Gribkov D. Y. , A. S. Gribovsky , A. O. Gridin , B. V. Grinyov , K. I. Gritsay , S. A. Gromov , V. A. Gromov , Yu. V. Gurchin , Yu. V. Gusakov , A. V. Guskov , F. Guzman , J. Haidenbauer , M. Havranek , A. V. Ivanov , N. Ya. Ivanov , A. Yu. Isupov , V. Jary , Shi-Hai Jia , D. Jokovic , A. Kaplii , A. V. Karpishkov , E. A. Kasianova , G. D. Kekelidze , S. V. Khabarov , P. R. Kharusov , A. N. Khrenov , V. T. Kim , N. V. Kirichkov , D. Yu. Kirin , I. Kishchin , A. Klekotko , Ya. Klopot , A. Kluev , E. S. Kokoulina , V. I. Komarov , A. M. Kondratenko , M. A. Kondratenko , I. Konorov , Yu. A. Kopylov , M. V. Korjik , P. S. Korovkin , A. Yu. Korzenev , E. V. Kostukov , A. Kotzinian , A. D. Kovalenko , V. N. Kovalenko , Kozhin M. A. , V. A. Kramarenko , V. N. Kruglov , A. Kubankin , Yu. Kubankin , S. Kuleshov , V. E. Kovtun , A. V. Kulikov , V. S. Kurbatov , R. Kurjata , S. A. Kutuzov , E. V. Kuznetsova , E. A. Ladygin , V. P. Ladygin , D. M. Larionova , D. Lednicky , R. Lednicky , Pei-Yu Li , Xiao-Mei Li , A. S. Lobko , E. Luschevskaya , A. I. L'vov , V. N. Lyashchenko , V. M. Lysan , V. Lyubovitskij , A. Maggiora , V. P. Maleev , A. Maltsev , T. V. Malykhina , A. M. Makankin , V. V. Makarenko , D. Maletic , D. B. Malkevich , M. Marcisovsky , E. V. Martovitsky , J. Marzec , M. M. Merkin , G. V. Meshcheriakov , Yu. M. Mitrankov , M. M. Mitrankova , E. O. Mitrofanov , B. Morozov , I. V. Moshkovsky , A. Movsisyan , S. N. Nagorniy , P. Yu. Nechaeva , M. A. Nefedov , Yu. A. Nefedov , M. A. Negodaev , G. Neue , D. N. Nikiforov , V. A. Nikitin , A. S. Nikolaev , D. A. Oleynik , G. A. Ososkov , D. Panzieri , B. Parsamyan , S. S. Parzhitsky , G. Pastuszak , V. V. Pavlov , A. A. Pavlova , I. S. Pelevanyuk , E. E. Perepelkin , D. V. Peshekhonov , A. Sh. Petrosyan , A. A. Piskun , V. V. Plotnikov , D. V. Podgainy , P. Polozov , R. V. Polyakova , V. V. Polyansky , V. V. Popov , J. Popule , I. Prochazka , I. K. Prokhorov , S. N. Reva , S. G. Reznikov , E. P. Rezvaya , J. -M. Richard , O. V. Rogachevsky , V. M. Romanov , A. I. Rudenko , M. A. Rumyantsev , V. Rusinov , N. A. Rybakov , A. Rychter , A. Rymbekova , A. B. Safonov , K. M. Salamatin , V. A. Saleev , A. G. Samartsev , A. A. Savenkov , M. Savic , A. A. Semak , V. N. Shaikovsky , A. A. Shavrin , A. I. Sheremeteva , S. S. Shimanskii , A. V. Shipilova , K. Shtejer , R. Shulyakovsky , A. A. Sinitsa , N. B. Skachkov , A. N. Skachkova , M. Slunecka , V. Sluneckova , A. A. Solin , A. V. Solin , Jin-Xin Song , V. V. Sotnikov , Peng-Fei Sun , S. Yu. Starikova , A. V. Stavinskiy , E. A. Streletskaya , M. Strikman , D. Strusik-Kotlozh , S. I. Suchkov , R. I. Sultanov , Hao Sun , D. N. Svirida , O. G. Tarasov , E. I. Tarkovskyi , A. Temerbayev , A. A. Terekhin , Tereschenko V. V. , Terkulov A. R. , Teryaev O. V. , Tishevsky A. V. , Tkachenko A. V. , A. A. V. V. Tokmenin , L. Tomasek , E. Tomasi-Gustafsson , N. P. Topchiev , N. D. Topilin , B. L. Topko , F. Tosello , A. Trifonov , Yu. A. Troyan. , N. O. Trunov , R. Tsenov , E. A. Usenko , V. V. Uzhinsky , Yu. N. Uzikov , F. F. Valiev , E. V. Vasilieva , V. V. Vechernin , A. Yu. Verkheev , L. S. Vertogradov , Yu. L. Vertogradova , V. A. Vesenkov , M. Virius , N. I. Volchansky , I. S. Volkov , P. V. Volkov , A. Vorobiev , V. Vrba , Qian Wang , I. P. Yudin , J. Zamora , N. I. Zamyatin , K. Zaremba , A. V. Zelenov , E. V. Zemlyanichkina , Yun-Yu Zhang , Jun-Wei Zhang , Ming-Rui Zhao , Qiang Zhao , Yu Zhi , A. S. Zhemchugov , A. Zhevlakov , N. M. Zhigareva , P. N. Zhmurin , I. A. Zhukov , N. I Zhuravlev. , M. Ziembicki , A. V. Zinin , E. V. Zubarev , M. I. Zuev

The Theory of the Nucleon Spin

I discuss two topics of current interest in the study of the spin structure of the nucleon. First, I discuss whether there is a sum rule for the components of the nucleon's angular moments. Second, I discuss the measurement of the nucleon's…

High Energy Physics - Phenomenology · Physics 2009-10-31 R. L. Jaffe

Light Scalar Mesons in Central Production at COMPASS

COMPASS is a fixed-target experiment at the CERN SPS that studies the spectrum of light-quark hadrons. In 2009, it collected a large dataset using a $190\,$GeV$/c$ positive hadron beam impinging on a liquid-hydrogen target in order to…

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

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

Possible studies of gluon transversity in the spin-1 deuteron at hadron-accelerator facilities

Chiral-odd gluon transversity distribution could shed light on a new aspect of hadron physics. Although we had much progress recently on quark transversity distributions, there is no experimental measurement on the gluon transversity. The…

High Energy Physics - Phenomenology · Physics 2021-07-30 S. Kumano , Qin-Tao Song

First Results on Hadron Spectroscopy at COMPASS

The COMPASS fixed-target experiment at the CERN SPS is dedicated to the study of hadron structure and dynamics. One goal of the physics programme using hadron beams is the search for new states, in particular the search for $J^{PC}$ exotic…

High Energy Physics - Experiment · Physics 2019-08-13 Frank Nerling

GPD Physics With Polarized Muon Beams at COMPASS-II

A major part of the future COMPASS program is dedicated to the investigation of the nucleon structure through Deeply Virtual Compton Scattering (DVCS) and Deeply Virtual Meson Production (DVMP). COMPASS will measure DVCS and DVMP reactions…

High Energy Physics - Experiment · Physics 2020-01-09 A. Ferrero

In Search of the Quark Spins in the Nucleon: A Next--to--Next--to-- Leading Order QCD Analysis

The data from the last seven experiments performed on polarized deep--inelastic scattering on proton and neutron (or deuteron) targets have been analyzed in search of a precise determination of the spin fraction carried by the quarks in the…

High Energy Physics - Phenomenology · Physics 2008-02-03 Paolo M. Gensini

Beam-target double spin asymmetry in quasi-elastic electron scattering off the deuteron with CLAS

Quasi-elastic electron scattering on the deuteron is a benchmark reaction to test our understanding of deuteron structure and the properties and interactions of the two nucleons bound in the deuteron. The experimental data presented here…

Nuclear Experiment · Physics 2017-03-01 Michael Mayer , Sebastian E. Kuhn , the CLAS Collaboration

Polarized Structure Functions in the Valence Quark and Resonance Regions and the GDH Sum

I present in this paper the neutron spin physics program in Hall A at Jefferson Laboratory using a polarized helium-3 target. The program encompasses several completed experiments, in which, valuable spin observables (spin dependent…

High Energy Physics - Experiment · Physics 2011-07-19 Z. -E. Meziani

Polarized Structure Functions: a Theoretical Update

We review recent developments in the theory and phenomenology of polarized structure functions. We summarize recent experimental data on the proton and deuteron structure function $g_1$, and their impact on the understanding of polarized…

High Energy Physics - Phenomenology · Physics 2008-02-03 Stefano Forte

Transversity and Collins Fragmentation Functions: Towards a New Global Analysis

A new, preliminary global analysis of the experimental data on azimuthal asymmetries in SIDIS from HERMES and COMPASS collaborations, and in e+e- --> h_1 h_2 X processes from the BELLE collaboration, is performed. The new data allow for a…

High Energy Physics - Phenomenology · Physics 2015-05-13 M. Anselmino , M. Boglione , U. D'Alesio , A. Kotzinian , S. Melis , F. Murgia , A. Prokudin , C. Turk

Spin physics with light and heavy neutral mesons at Protvino

PROZA-M experiment results as well the proposal of a new spin program with the use of a polarized proton beam are presented. Significant asymmetries were observed in inclusive $\pi^0$ production. The new program proposes to study a wealth…

High Energy Physics - Experiment · Physics 2008-11-26 V. V. Mochalov , S. V. Ivanov , V. I. Garkusha , A. S. Gurevich , V. I. Kravtsov , O. P. Lebedev , N. I. Minaev , L. V. Nogach , S. B. Nurushev , A. N. Vasiliev , A. V. Otboev , Yu. M. Shatunov , D. K. Toporkov , A. S. Belov

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

Deuteron Spin Structure Functions at Small Bjorken-x

We investigate polarized deuteron structure functions at small values of the Bjorken variable, x < 0.1. In this region contributions from the coherent interaction of diffractively excited hadronic states with both nucleons become important.…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. Edelmann , G. Piller , W. Weise

The Spin Structure of the Nucleon: Theoretical Overview

I review what is known about the quark and gluon spin distributions in the nucleon. I discuss in some detail (a) the existence of sum rules for angular momentum; (b) the interpretation and possible measurement of the nucleon's transversity…

High Energy Physics - Phenomenology · Physics 2009-11-07 R. L. Jaffe

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

Spin Physics with the PHENIX Detector System

The PHENIX experiment at RHIC has extended its scope to cover spin physics using polarized proton beams. The major goals of the spin physics at RHIC are elucidation of the spin structure of the nucleon and precision tests of the symmetries.…

High Energy Physics - Experiment · Physics 2019-08-14 N. Saito