Differential cross section measurements for γn→π-p above the first nucleon resonance region

CLAS Collaboration

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The quasifree γd→π-p(p) differential cross section has been measured with CLAS at photon beam energies Eγ from 0.445 to 2.510 GeV (corresponding to W from 1.311 to 2.366 GeV) for pion center-of-mass angles cosθπc.m. from -0.72 to 0.92. A correction for final state interactions has been applied to these data to extract the γn→π-p differential cross sections. These cross sections are quoted in 8428 (Eγ,cosθπc.m.) bins, a factor of nearly 3 increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of N∗ resonances and extract their properties. Selected photon decay amplitudes N∗→γn at the resonance poles are determined for the first time and are reported here.

Original languageEnglish (US)
Article number035204
JournalPhysical Review C
Volume96
Issue number3
DOIs
StatePublished - Sep 18 2017

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cross sections
photon beams
center of mass
pions
poles
kinematics
statistics
photons
decay
interactions
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Differential cross section measurements for γn→π-p above the first nucleon resonance region. / CLAS Collaboration.

In: Physical Review C, Vol. 96, No. 3, 035204, 18.09.2017.

Research output: Contribution to journalArticle

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title = "Differential cross section measurements for γn→π-p above the first nucleon resonance region",
abstract = "The quasifree γd→π-p(p) differential cross section has been measured with CLAS at photon beam energies Eγ from 0.445 to 2.510 GeV (corresponding to W from 1.311 to 2.366 GeV) for pion center-of-mass angles cosθπc.m. from -0.72 to 0.92. A correction for final state interactions has been applied to these data to extract the γn→π-p differential cross sections. These cross sections are quoted in 8428 (Eγ,cosθπc.m.) bins, a factor of nearly 3 increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of N∗ resonances and extract their properties. Selected photon decay amplitudes N∗→γn at the resonance poles are determined for the first time and are reported here.",
author = "{CLAS Collaboration} and Mattione, {P. T.} and Carman, {D. S.} and Strakovsky, {I. I.} and Workman, {R. L.} and Kudryavtsev, {A. E.} and A. Svarc and Tarasov, {V. E.} and Adhikari, {K. P.} and S. Adhikari and D. Adikaram and Z. Akbar and {Anefalos Pereira}, S. and J. Ball and Baltzell, {N. A.} and M. Bashkanov and M. Battaglieri and V. Batourine and I. Bedlinskiy and Biselli, {A. S.} and S. Boiarinov and Briscoe, {W. J.} and Burkert, {V. D.} and T. Cao and A. Celentano and G. Charles and T. Chetry and G. Ciullo and L. Clark and Cole, {P. L.} and M. Contalbrigo and O. Cortes and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and M. Defurne and A. Deur and C. Djalali and Michael Dugger and R. Dupre and H. Egiyan and {El Alaoui}, A. and {El Fassi}, L. and P. Eugenio and G. Fedotov and R. Fersch and A. Filippi and Fleming, {J. A.} and Barry Ritchie",
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T1 - Differential cross section measurements for γn→π-p above the first nucleon resonance region

AU - CLAS Collaboration

AU - Mattione, P. T.

AU - Carman, D. S.

AU - Strakovsky, I. I.

AU - Workman, R. L.

AU - Kudryavtsev, A. E.

AU - Svarc, A.

AU - Tarasov, V. E.

AU - Adhikari, K. P.

AU - Adhikari, S.

AU - Adikaram, D.

AU - Akbar, Z.

AU - Anefalos Pereira, S.

AU - Ball, J.

AU - Baltzell, N. A.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Burkert, V. D.

AU - Cao, T.

AU - Celentano, A.

AU - Charles, G.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Defurne, M.

AU - Deur, A.

AU - Djalali, C.

AU - Dugger, Michael

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fersch, R.

AU - Filippi, A.

AU - Fleming, J. A.

AU - Ritchie, Barry

PY - 2017/9/18

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N2 - The quasifree γd→π-p(p) differential cross section has been measured with CLAS at photon beam energies Eγ from 0.445 to 2.510 GeV (corresponding to W from 1.311 to 2.366 GeV) for pion center-of-mass angles cosθπc.m. from -0.72 to 0.92. A correction for final state interactions has been applied to these data to extract the γn→π-p differential cross sections. These cross sections are quoted in 8428 (Eγ,cosθπc.m.) bins, a factor of nearly 3 increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of N∗ resonances and extract their properties. Selected photon decay amplitudes N∗→γn at the resonance poles are determined for the first time and are reported here.

AB - The quasifree γd→π-p(p) differential cross section has been measured with CLAS at photon beam energies Eγ from 0.445 to 2.510 GeV (corresponding to W from 1.311 to 2.366 GeV) for pion center-of-mass angles cosθπc.m. from -0.72 to 0.92. A correction for final state interactions has been applied to these data to extract the γn→π-p differential cross sections. These cross sections are quoted in 8428 (Eγ,cosθπc.m.) bins, a factor of nearly 3 increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of N∗ resonances and extract their properties. Selected photon decay amplitudes N∗→γn at the resonance poles are determined for the first time and are reported here.

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