Differential cross sections and polarization observables from CLAS K⁎ photoproduction and the search for new N⁎ states

The CLAS Collaboration

doi:10.1016/j.physletb.2017.05.029

Differential cross sections and polarization observables from CLAS K^⁎ photoproduction and the search for new N^⁎ states

The CLAS Collaboration

University of Bonn
Russian Research Centre Kurchatov Institute
Ohio University
Thomas Jefferson National Accelerator Facility
Old Dominion University
Florida State University
National Institute for Nuclear Physics
Florida International University
Université Paris-Saclay
Alikhanov Institute for Theoretical and Experimental Physics
Carnegie Mellon University
Fairfield University
George Washington University
University of Glasgow
Idaho State University
University of Rome Tor Vergata
A. Alikhanian Yerevan Institute of Physics
University of South Carolina
Arizona State University
CNRS/IN2P3
Argonne National Laboratory
Université Grenoble Alpes
Universidad Técnica Federico Santa Maria
Mississippi State University
Lomonosov Moscow State University
University of Edinburgh
James Madison University

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

21 Scopus citations

Abstract

The reaction γp→K^⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density matrix elements, and the Λ recoil polarization are compared with theoretical predictions using the BnGa partial wave analysis. The main result is the evidence for significant contributions from N(1895)1/2⁻ and N(2100)1/2⁺ to the reaction. Branching ratios for decays into K^⁎Λ for these resonances and further resonances are reported.

Original language	English
Pages (from-to)	142-150
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	771
DOIs	https://doi.org/10.1016/j.physletb.2017.05.029
State	Published - 10 Aug 2017

Keywords

Baryon spectroscopy
Meson photoproduction
Polarization observables

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10.1016/j.physletb.2017.05.029

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@article{4a114337dc034880b5799b120ad70776,

title = "Differential cross sections and polarization observables from CLAS K⁎ photoproduction and the search for new N⁎ states",

abstract = "The reaction γp→K⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density matrix elements, and the Λ recoil polarization are compared with theoretical predictions using the BnGa partial wave analysis. The main result is the evidence for significant contributions from N(1895)1/2− and N(2100)1/2+ to the reaction. Branching ratios for decays into K⁎Λ for these resonances and further resonances are reported.",

keywords = "Baryon spectroscopy, Meson photoproduction, Polarization observables",

author = "\{The CLAS Collaboration\} and Anisovich, \{A. V.\} and K. Hicks and E. Klempt and Nikonov, \{V. A.\} and A. Sarantsev and W. Tang and D. Adikaram and Z. Akbar and Amaryan, \{M. J.\} and \{Anefalos Pereira\}, S. and Badui, \{R. A.\} and J. Ball and M. Battaglieri and V. Batourine and I. Bedlinskiy and Biselli, \{A. S.\} and Briscoe, \{W. J.\} and Burkert, \{V. D.\} and Carman, \{D. S.\} and A. Celentano and S. Chandavar and T. Chetry and G. Ciullo and L. Clark and Cole, \{P. L.\} and N. Compton and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and \{De Vita\}, R. and \{De Sanctis\}, E. and A. Deur and C. Djalali and M. Dugger and R. Dupre and H. Egiyan and \{El Alaoui\}, A. and \{El Fassi\}, L. and P. Eugenio and E. Fanchini and G. Fedotov and A. Filippi and Fleming, \{J. A.\} and N. Gevorgyan and Y. Ghandilyan and Giovanetti, \{K. L.\} and Girod, \{F. X.\} and C. Gleason and Jo, \{H. S.\}",

note = "Publisher Copyright: {\textcopyright} 2017 The Author",

year = "2017",

month = aug,

day = "10",

doi = "10.1016/j.physletb.2017.05.029",

language = "English",

volume = "771",

pages = "142--150",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Differential cross sections and polarization observables from CLAS K⁎ photoproduction and the search for new N⁎ states

AU - The CLAS Collaboration

AU - Anisovich, A. V.

AU - Hicks, K.

AU - Klempt, E.

AU - Nikonov, V. A.

AU - Sarantsev, A.

AU - Tang, W.

AU - Adikaram, D.

AU - Akbar, Z.

AU - Amaryan, M. J.

AU - Anefalos Pereira, S.

AU - Badui, R. A.

AU - Ball, J.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Briscoe, W. J.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Compton, N.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Djalali, C.

AU - Dugger, M.

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fanchini, E.

AU - Fedotov, G.

AU - Filippi, A.

AU - Fleming, J. A.

AU - Gevorgyan, N.

AU - Ghandilyan, Y.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Gleason, C.

AU - Jo, H. S.

PY - 2017/8/10

Y1 - 2017/8/10

N2 - The reaction γp→K⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density matrix elements, and the Λ recoil polarization are compared with theoretical predictions using the BnGa partial wave analysis. The main result is the evidence for significant contributions from N(1895)1/2− and N(2100)1/2+ to the reaction. Branching ratios for decays into K⁎Λ for these resonances and further resonances are reported.

AB - The reaction γp→K⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density matrix elements, and the Λ recoil polarization are compared with theoretical predictions using the BnGa partial wave analysis. The main result is the evidence for significant contributions from N(1895)1/2− and N(2100)1/2+ to the reaction. Branching ratios for decays into K⁎Λ for these resonances and further resonances are reported.

KW - Baryon spectroscopy

KW - Meson photoproduction

KW - Polarization observables

UR - https://www.scopus.com/pages/publications/85021695407

U2 - 10.1016/j.physletb.2017.05.029

DO - 10.1016/j.physletb.2017.05.029

M3 - Article

AN - SCOPUS:85021695407

SN - 0370-2693

VL - 771

SP - 142

EP - 150

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Differential cross sections and polarization observables from CLAS K^⁎ photoproduction and the search for new N^⁎ states

Abstract

Keywords

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