# COMPASS Conference Proceedings

2017-02-25
07:55
 The $t$-dependence of the pure DVCS cross section at COMPASS / Joerg, P. The key reactions to study the Generalised Parton Distributions are Deeply Virtual Compton Scattering (DVCS) and Deeply Virtual Meson Production (DVMP). [...] arXiv:1702.06315. - Full text

2017-02-25
07:55
 Measurement of the exclusive ${\pi}^0$ muoproduction cross section at COMPASS / Gorzellik, Matthias At COMPASS DVCS and DVMP processes are studied in order to probe the partonic structure of the nucleon by constraining GPD models. [...] arXiv:1702.06293. - Full text

2017-02-10
07:37
 COMPASS measurement of the $P_T$ weighted Sivers asymmetry / Bradamante, Franco 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. [...] arXiv:1702.00621. - 4 p. Full text

2016-09-29
01:12
 Photons interacting with Hadrons at COMPASS / Friedrich, Jan Michael (Technische Universitaet Muenchen (DE)) /COMPASS NA58 Collaboration COMPASS is a multi-purpose experiment operated at CERN for investigations of the strong interaction from low to medium energy scales. At low energies, photon-pion interactions provide input for understanding the effective dynamics of strongly bound states of quarks and gluons, most prominently the recent measurement of the polarisability of the charged pion. [...] COMPASS-PROC-2016-001.- Geneva : CERN, 2015 - 8. Fulltext: PDF;

2016-09-28
07:58
 Extraction of the $\pi^+\pi^-$ Subsystem in Diffractively Produced $\pi^-\pi^+\pi^-$ at COMPASS / Krinner, Fabian (Munich, Tech. U.) /for the COMPASS collaboration The COMPASS experiment at CERN has collected a large data sample of 50 million diffractively produced $\pi^-\pi^+\pi^-$ events using a $190\,$GeV$/c$ negatively charged hadron beam. The partial-wave analysis (PWA) of these high-precision data reveals previously unseen details. [...] arXiv:1609.08514.- 2017 - 6 p. - Published in : JPS Conf.Proc. 13 (2017) 020028 Fulltext: PDF; External link: Preprint In : Meson-Nucleon Physics and the Structure of the Nucleon, Kyoto, Japan, 25 - 30 Jul 2016, pp.020028

2016-07-27
06:00
 Tests of Chiral perturbation theory with COMPASS / Friedrich, Jan M (CERN) /COMPASS Collaboration The COMPASS experiment at CERN accesses pion-photon reactions via the Primakoff effect., where high-energetic pions react with the quasi-real photon field surrounding the target nuclei. When a single real photon is produced, pion Compton scattering is accessed and from the measured cross-section shape, the pion polarisability is determined. [...] 2014 - 4 p. - Published in : EPJ Web Conf. 73 (2014) 05011 Fulltext: PDF; In : 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Rome, Italy, 30 Sep - 4 Oct 2013, pp.05011

2016-06-08
06:45
 New results from COMPASS / Kabuß, Eva-Maria (Mainz U.) /COMPASS Collaboration An overview on recent COMPASS results is given, including the extraction of the longitudinal spin structure functions interpreted with a NLO QCD fit, new results on the gluon polarisation and a measurement of pion and kaon multiplicities with a LO extraction of quark-to-hadron fragmentation functions SISSA, 2015 - 6 p. - Published in : PoS: EPS-HEP2015 (2015) , pp. 502 Fulltext: PDF; External link: Published version from PoS In : European Physical Society Conference on High Energy Physics 2015, Vienna, Austria, 22 - 29 Jul 2015, pp.502

2016-06-08
06:45
 Generalized Parton Distributions program at COMPASS / Fuchey, Eric (Saclay) /COMPASS Collaboration SISSA, 2015 - Published in : PoS: QCDEV2015 (2015) , pp. 048 Fulltext: PDF; External link: Published version from PoS In : QCD Evolution Workshop, Newport News, VA, USA, 26-30 May 2015, pp.048

2016-06-08
06:45
 Precision Hadron Spectroscopy at COMPASS - The Scalar Isoscalar Meson Spectrum - / Austregesilo, Alexander (Munich, Tech. U.) /COMPASS Collaboration SISSA, 2015 - Published in : PoS: Bormio2015 (2015) , pp. 022 Fulltext: PDF; External link: Published version from PoS In : 53rd International Winter Meeting on Nuclear Physics, Bormio, Italy, 26 - 30 Jan 2015, pp.022

2016-06-08
06:44
 The new spin physics program of the COMPASS experiment / Silva, Luís (LIP, Lisbon) /COMPASS Collaboration The COMPASS experiment, at CERN SPS, has been compiling for more than a decade successful and precise results on nucleon structure and hadron spectroscopy, leading to statistical errors much smaller than previously measured. The new COMPASS spin physics program, starting this year, aims to a rather complete nucleon structure description; this new representation goes beyond the collinear approximation by including the quark intrinsic transverse momentum distributions. [...] 2015 - 9 p. - Published in : EPJ Web Conf. 95 (2015) 04063 EDP Sciences Open Access article: PDF; In : 3rd International Conference on New Frontiers in Physics, Kolymbari, Crete, Greece, 28 Jul - 06 Aug 2014, pp.04063