First measurement of direct photoproduction of the a2(1320)0 meson on the proton

The CLAS Collaboration

doi:10.1103/PhysRevC.102.032201

First measurement of direct photoproduction of the a2(1320)0 meson on the proton

The CLAS Collaboration

National Institute for Nuclear Physics
Thomas Jefferson National Accelerator Facility
Complutense University
Fondazione Bruno Kessler
Indiana University Bloomington
Old Dominion University
Florida International University
George Washington University
Temple University
Russian Research Centre Kurchatov Institute
Duquesne University
University of Brescia
Fairfield University
Université Paris-Saclay
Universidad Técnica Federico Santa Maria
CNRS/IN2P3
Mississippi State University
University of Ferrara
University of Glasgow
Lamar University
Idaho State University
Florida State University
Massachusetts Institute of Technology
University of Rome Tor Vergata
A. Alikhanian Yerevan Institute of Physics
University of Connecticut
Ohio University
University of South Carolina
Arizona State University
University of New Hampshire
Argonne National Laboratory
Lomonosov Moscow State University

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We present the first measurement of the reaction γp→a2(1320)0p in the photon energy range 3.5-5.5GeV and four-momentum transfer squared 0.2<-t<2.0GeV2. Data were collected with the CEBAF Large Acceptance Spectrometer detector at the Thomas Jefferson National Accelerator Facility. The a2 resonance was detected by measuring the reaction γp→π0ηp and reconstructing the π0η invariant mass. The most prominent feature of the differential cross section is a dip at-t≈0.55GeV2. This can be described in the framework of Regge phenomenology, where the exchange degeneracy hypothesis predicts a zero in the reaction amplitude for this value of the four-momentum transfer.

Original language	English
Article number	032201
Journal	Physical Review C
Volume	102
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.102.032201
State	Published - Sep 2020

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10.1103/PhysRevC.102.032201

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@article{d25d3ff5552e411f93dde535e34ff6a4,

title = "First measurement of direct photoproduction of the a2(1320)0 meson on the proton",

abstract = "We present the first measurement of the reaction γp→a2(1320)0p in the photon energy range 3.5-5.5GeV and four-momentum transfer squared 0.2<-t<2.0GeV2. Data were collected with the CEBAF Large Acceptance Spectrometer detector at the Thomas Jefferson National Accelerator Facility. The a2 resonance was detected by measuring the reaction γp→π0ηp and reconstructing the π0η invariant mass. The most prominent feature of the differential cross section is a dip at-t≈0.55GeV2. This can be described in the framework of Regge phenomenology, where the exchange degeneracy hypothesis predicts a zero in the reaction amplitude for this value of the four-momentum transfer.",

author = "\{The CLAS Collaboration\} and A. Celentano and M. Battaglieri and \{De Vita\}, R. and L. Marsicano and V. Mathieu and A. Pilloni and A. Szczepaniak and Adhikari, \{K. P.\} and S. Adhikari and Amaryan, \{M. J.\} and G. Angelini and H. Atac and L. Barion and I. Bedlinskiy and Fatiha Benmokhtar and A. Bianconi and Biselli, \{A. S.\} and F. Boss{\`u} and S. Boiarinov and Briscoe, \{W. J.\} and Brooks, \{W. K.\} and D. Bulumulla and Burkert, \{V. D.\} and Carman, \{D. S.\} and Carvajal, \{J. C.\} and P. Chatagnon and T. Chetry and G. Ciullo and L. Clark and Cole, \{P. L.\} and M. Contalbrigo and O. Cortes and V. Crede and R. Cruz-Torres and A. D'Angelo and N. Dashyan and M. Defurne and A. Deur and S. Diehl and C. Djalali and M. Dugger and R. Dupre and H. Egiyan and M. Ehrhart and \{El Alaoui\}, A. and \{El Fassi\}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and Jo, \{H. S.\}",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = sep,

doi = "10.1103/PhysRevC.102.032201",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - First measurement of direct photoproduction of the a2(1320)0 meson on the proton

AU - The CLAS Collaboration

AU - Celentano, A.

AU - Battaglieri, M.

AU - De Vita, R.

AU - Marsicano, L.

AU - Mathieu, V.

AU - Pilloni, A.

AU - Szczepaniak, A.

AU - Adhikari, K. P.

AU - Adhikari, S.

AU - Amaryan, M. J.

AU - Angelini, G.

AU - Atac, H.

AU - Barion, L.

AU - Bedlinskiy, I.

AU - Benmokhtar, Fatiha

AU - Bianconi, A.

AU - Biselli, A. S.

AU - Bossù, F.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bulumulla, D.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Carvajal, J. C.

AU - Chatagnon, P.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - Cruz-Torres, R.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - Defurne, M.

AU - Deur, A.

AU - Diehl, S.

AU - Djalali, C.

AU - Dugger, M.

AU - Dupre, R.

AU - Egiyan, H.

AU - Ehrhart, M.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Jo, H. S.

PY - 2020/9

Y1 - 2020/9

N2 - We present the first measurement of the reaction γp→a2(1320)0p in the photon energy range 3.5-5.5GeV and four-momentum transfer squared 0.2<-t<2.0GeV2. Data were collected with the CEBAF Large Acceptance Spectrometer detector at the Thomas Jefferson National Accelerator Facility. The a2 resonance was detected by measuring the reaction γp→π0ηp and reconstructing the π0η invariant mass. The most prominent feature of the differential cross section is a dip at-t≈0.55GeV2. This can be described in the framework of Regge phenomenology, where the exchange degeneracy hypothesis predicts a zero in the reaction amplitude for this value of the four-momentum transfer.

AB - We present the first measurement of the reaction γp→a2(1320)0p in the photon energy range 3.5-5.5GeV and four-momentum transfer squared 0.2<-t<2.0GeV2. Data were collected with the CEBAF Large Acceptance Spectrometer detector at the Thomas Jefferson National Accelerator Facility. The a2 resonance was detected by measuring the reaction γp→π0ηp and reconstructing the π0η invariant mass. The most prominent feature of the differential cross section is a dip at-t≈0.55GeV2. This can be described in the framework of Regge phenomenology, where the exchange degeneracy hypothesis predicts a zero in the reaction amplitude for this value of the four-momentum transfer.

UR - https://www.scopus.com/pages/publications/85092736010

U2 - 10.1103/PhysRevC.102.032201

DO - 10.1103/PhysRevC.102.032201

M3 - Article

AN - SCOPUS:85092736010

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 032201

ER -

First measurement of direct photoproduction of the a2(1320)0 meson on the proton

Abstract

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