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CERN COMPASS can investigate pion-photon interactions, to achieve a unique Primakoff Coulomb physics program, centered on pion polarizability and hybrid meson structure studies. COMPASS uses 100-280 GeV beams (muon, pion) and a virtual…

High Energy Physics - Experiment · Physics 2007-05-23 Murray Moinester

COMPASS is a fixed target experiment at CERN investigating the spin structure of the nucleon and performing hadron spectroscopy. The transverse spin structure of the nucleon is studied in semi-inclusive deep-inelastic scattering of 160…

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

COMPASS is a multi-purpose fixed-target experiment at CERN's M2 beam line 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 $K^-\pi^-\pi^+$ final…

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

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

The COMPASS experiment is a fixed target experiment at the CERN SPS using muon and hadron beams for the investigation of the spin structure of the nucleon and hadron spectroscopy. The main objective of the muon physics program is the study…

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

Despite decades of research, we still lack a detailed quantitative understanding of the way quantum chromodynamics (QCD) generates the spectrum of hadrons. Precise experimental studies of the hadron excitation spectrum and the dynamics of…

High Energy Physics - Experiment · Physics 2025-07-14 Bernhard Ketzer , Boris Grube , Dmitry Ryabchikov

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

The COMPASS experiment has obtained first physics results in the field of polarized distribution functions for quarks and gluons using muon scattering off polarized deuterons. The analysis using open charm production and pairs of high $p_T$…

High Energy Physics - Experiment · Physics 2009-11-11 Stephan Paul

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. The two-stage…

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

We describe a hadron physics program attainable with a partially instrumented CERN COMPASS spectrometer, involving tracking detectors and moderate-size ECAL2/HCAL2 calorimeters. COMPASS can realize a state-of-the-art hadron beam physics…

High Energy Physics - Experiment · Physics 2007-05-23 Murray A. Moinester , Victor Steiner

The goal of the COMPASS experiment at CERN is to study the structure and dynamics of hadrons. The two-stage spectrometer used by the experiment has large acceptance and covers a wide kinematic range for charged as well as neutral particles…

High Energy Physics - Experiment · Physics 2016-12-21 Boris Grube

Transverse spin physics is an important part of the scientific programme of the COMPASS experiment at CERN. The analysis of the data taken with the target polarized orthogonally to the 160 GeV/c muon beam momentum has allowed to measure for…

High Energy Physics - Experiment · Physics 2008-11-26 F. Bradamante

The goal of the COMPASS experiment at CERN is to study the structure and spectroscopy of hadrons. The two-stage spectrometer has large acceptance and covers a wide kinematic range for charged as well as neutral particles allowing to access…

High Energy Physics - Experiment · Physics 2017-03-27 Fabian Krinner

COMPASS is a high-energy physics experiment operating at the SPS at CERN. Wide physics program of the experiment comprises study of hadron structure and spectroscopy with high energy muon and hadrons beams. As for the muon-program, one of…

High Energy Physics - Experiment · Physics 2015-04-09 Bakur Parsamyan

COMPASS is a fixed-target high energy physics experiment at the SPS at CERN \cite{Abbon:2007pq}. One of the important objectives of the experiment is the exploration of the transverse spin structure of the nucleon via spin dependent…

High Energy Physics - Experiment · Physics 2015-06-12 Bakur Parsamyan

The study of transverse spin and transverse momentum effects is an important part of the scientific program of COMPASS, a fixed target experiment at the CERN SPS. For these studies a 160 GeV/c momentum muon beam is scattered on a…

High Energy Physics - Experiment · Physics 2022-03-02 F. Bradamante

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

In the list of the main items studied by the CERN COMPASS experiment there are the transverse spin and momentum effects visible in the azimuthal distributions of hadrons produced in the deep inelastic scattering. In the years 2002-2004…

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

The COMPASS experiment at CERN's SPS investigates the structure and excitations of strongly interacting systems. Using reactions of 190 GeV/c pions with protons and nuclear targets, mediated by the strong and electromagnetic interaction, an…

High Energy Physics - Experiment · Physics 2019-08-13 Bernhard Ketzer

COMPASS is a fixed target experiment at the CERN SPS, with a rich physics program focused on nucleon spin structure and on hadron spectroscopy. One of the main goals of the spin program is the measurement of the transverse spin distribution…

Nuclear Experiment · Physics 2012-08-27 By COMPASS Collaboration