Beam asymmetry Σ in η′ photoproduction off the proton at the GRAAL experiment

G. Mandaglio; V. Bellini; J. P. Bocquet; M. Capogni; F. Curciarello; A. D'Angelo; V. De Leo; J.P. Didelez; R. Di Salvo; A. Fantini; D. Franco; G. Gervino; F. Ghio; G. Giardina; B. Girolami; A.M. Lapik; P. Levi Sandri; A. Lleres; F. Mammoliti; M. Manganaro; D. Moricciani; A.N. Mushkarenkov; V.G. Nedorezov; D. Rebreyend; N.V. Rudnev; C. Schaerf; M.L. Sperduto; M.C. Sutera; A. Turinge; V. Vegna; I. Zonta

doi:10.1051/epjconf/20147304006

All issues

Volume 73 (2014)

EPJ Web of Conferences, 73 (2014) 04006

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 73, 2014 MENU 2013 – 13^th International Conference Meson-Nucleon Physics and the Structure of the Nucleon


Article Number		04006
Number of page(s)		5
Section		Baryon Resonances
DOI		https://doi.org/10.1051/epjconf/20147304006
Published online		09 June 2014

EPJ Web of Conferences 73, 04006 (2014)
https://doi.org/10.1051/epjconf/20147304006

Beam asymmetry Σ in η′ photoproduction off the proton at the GRAAL experiment

G. Mandaglio¹^,2^,3^a, V. Bellini³^,4, J. P. Bocquet⁵, M. Capogni⁶^,7^,b, F. Curciarello²^,3, A. D'Angelo⁶^,7, V. De Leo²^,3, J.P. Didelez⁸, R. Di Salvo⁷, A. Fantini⁶^,7, D. Franco⁶^,7^,c, G. Gervino⁹^,10, F. Ghio¹², G. Giardina²^,3, B. Girolami¹², A.M. Lapik¹³, P. Levi Sandri¹⁴, A. Lleres⁵, F. Mammoliti³^,4, M. Manganaro²^,3^,d, D. Moricciani⁷, A.N. Mushkarenkov¹³, V.G. Nedorezov¹³, D. Rebreyend⁵, N.V. Rudnev¹³, C. Schaerf⁶^,7, M.L. Sperduto³^,4, M.C. Sutera³, A. Turinge¹³, V. Vegna⁶^,7^,e and I. Zonta⁶^,7

¹ Centro Siciliano di Fisica Nucleare e Struttura della Materia, viale Andrea Doria 6, 95125 Catania, Italy
² Dip. di Fisica e di Scienze della Terra, Università di Messina, salita Sperone 31, 98166 Messina, Italy
³ INFN – Sezione di Catania, via Santa Sofia 64, 95123 Catania, Italy
⁴ Dip. di Fisica – Università di Catania, via Santa Sofia 64, 95123 Catania, Italy
⁵ LPSC, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble IPN, 38026 Grenoble, France
⁶ Dip. di Fisica – Università di Roma “Tor Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
⁷ INFN – Sezione di Roma “Tor Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
⁸ IN2P3, Institut de Physique Nucléaire, Rue Georges Clemenceau, 91406 Orsay, France
⁹ Dip. di Fisica Sperimentale – Università di Torino, via Pietro Giuria 1, 10125 Torino, Italy
¹⁰ INFN – Sezione di Torino, via Pietro Giuria 1, 10125 Torino, Italy
¹¹ Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
¹² INFN – Sezione di Roma, Piazzale Aldo Moro 2, 00185 Roma, Italy
¹³ Institute for Nuclear Research, 60-letiya Oktyabrya prospekt 7a, 117312 Moscow, Russia
¹⁴ INFN – Laboratori Nazionali di Frascati, via E. Fermi 40, 00044 Frascati, Italy

^a e-mail: gmandaglio@unime.it

Published online: 9 June 2014

Abstract

The only recent η′ photoproduction data off proton available in literature are the differential and total cross sections published by the CLAS and CB-ELSA-TAPS Collaborations. However, the wide information about reaction cross sections are not sufficient to understand the role of resonances involved in the process. Different theoretical works stressed the importance to measure also polarization observables in order to solve the ambiguities in the choice of the parameters used in their models. We present the analysis of η′ photoproduction off the proton analysis, identifying the investigated meson by the π⁺π⁻η, π⁰π⁰η, and γγ decay modes by using the GRAAL apparatus; and we show the preliminary GRAAL results on the beam asymmetry Σ at beam energy of 1475 MeV.

^b

Present affiliation: ENEA – C.R. Casaccia Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti. via Anguillarese, 301 00123 Roma, Italy;

^c

Present affiliation: IPNL – 43, Bd. du 11 Novembre 1918, 69622 Villeurbanne Cedex, France;

^d

Present affiliation: Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain; Universidad de La Laguna, Dept. Astrofisica, 38206 La Laguna, Tenerife, Spain;

^e

Present affiliation: Physikalisches Institut – Bonn Universität, Nussallee 12, 53115 Bonn, Deutschland.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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