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

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

16 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 (US)
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 - Aug 10 2017

Keywords

Baryon spectroscopy
Meson photoproduction
Polarization observables

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2017.05.029

Cite this

@article{2b67b7bee3e34267b28ae475f5d927a9,

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 Michael 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 Barry Ritchie",

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

year = "2017",

month = aug,

day = "10",

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

language = "English (US)",

volume = "771",

pages = "142--150",

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

issn = "0370-2693",

publisher = "Elsevier",

}

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, Michael

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 - Ritchie, Barry

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 - http://www.scopus.com/inward/record.url?scp=85021695407&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85021695407&partnerID=8YFLogxK

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 -