First measurement of Ξ polarization in photoproduction

J. Bono, L. Guo, B. A. Raue, S. Adhikari, M. C. Kunkel, K. P. Adhikari, Z. Akbar, M. J. Amaryan, J. Ball, L. Barion, M. Bashkanov, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, W. K. Brooks, V. D. Burkert, F. Cao, D. S. Carman, A. Celentano & 98 others G. Charles, T. Chetry, G. Ciullo, Brandon A. Clary, P. L. Cole, M. Contalbrigo, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, Michael Dugger, H. Egiyan, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, A. Filippi, A. Fradi, G. Gavalian, N. Gevorgyan, Y. Ghandilyan, F. X. Girod, D. I. Glazier, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, K. Hafidi, N. Harrison, M. Hattawy, D. Heddle, K. Hicks, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, H. S. Jo, S. Johnston, M. L. Kabir, D. Keller, G. Khachatryan, M. Khachatryan, M. Khandaker, A. Kim, W. Kim, A. Klein, F. J. Klein, V. Kubarovsky, P. Lenisa, K. Livingston, I. J.D. MacGregor, N. Markov, B. McKinnon, T. Mineeva, R. A. Montgomery, C. Munoz Camacho, G. Niculescu, M. Osipenko, A. I. Ostrovidov, M. Paolone, R. Paremuzyan, K. Park, E. Pasyuk, W. Phelps, O. Pogorelko, J. W. Price, Y. Prok, D. Protopopescu, M. Ripani, A. Rizzo, G. Rosner, F. Sabatié, C. Salgado, R. A. Schumacher, Y. Sharabian, Iu Skorodumina, G. D. Smith, D. Sokhan, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, M. Taiuti, J. A. Tan, M. Ungaro, H. Voskanyan, E. Voutier, R. Wang, X. Wei, M. H. Wood, N. Zachariou, L. Zana, J. Zhang, Z. W. Zhao

Research output: Contribution to journalArticle

Abstract

Despite decades of studies of the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely unknown. While the parity-violating weak decay of hyperons offers a means of measuring their polarization, which could help discern their production mechanisms and identify their excitation spectra, no such study has been possible for doubly strange baryons in photoproduction, due to low production cross sections. However, by making use of the reaction γp→K+K+Ξ, we have measured, for the first time, the induced polarization, P, and the transferred polarization from circularly polarized real photons, characterized by Cx and Cz, to recoiling Ξs. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab for photon energies from just over threshold (2.4 GeV) to 5.45 GeV. These first-time measurements are compared, and are shown to broadly agree, with model predictions in which cascade photoproduction proceeds through the decay of intermediate hyperon resonances that are produced via relativistic meson exchange, offering a new step forward in the understanding of the production and polarization of doubly-strange baryons.

Original languageEnglish (US)
Pages (from-to)280-286
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume783
DOIs
StatePublished - Aug 10 2018

Fingerprint

photoproduction
hyperons
polarization
baryons
recoilings
photons
decay
acceptability
excitation
cascades
parity
mesons
time measurement
spectrometers
thresholds
cross sections
predictions
energy

Keywords

  • Cascade
  • Hyperon spectroscopy
  • Photoproduction
  • Polarization
  • Strange
  • Xi

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

First measurement of Ξ polarization in photoproduction. / Bono, J.; Guo, L.; Raue, B. A.; Adhikari, S.; Kunkel, M. C.; Adhikari, K. P.; Akbar, Z.; Amaryan, M. J.; Ball, J.; Barion, L.; Bashkanov, M.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Brooks, W. K.; Burkert, V. D.; Cao, F.; Carman, D. S.; Celentano, A.; Charles, G.; Chetry, T.; Ciullo, G.; Clary, Brandon A.; Cole, P. L.; Contalbrigo, M.; Crede, V.; D'Angelo, A.; Dashyan, N.; De Vita, R.; Defurne, M.; Deur, A.; Diehl, S.; Djalali, C.; Dugger, Michael; Egiyan, H.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fedotov, G.; Filippi, A.; Fradi, A.; Gavalian, G.; Gevorgyan, N.; Ghandilyan, Y.; Girod, F. X.; Glazier, D. I.; Gohn, W.; Golovatch, E.; Gothe, R. W.; Griffioen, K. A.; Hafidi, K.; Harrison, N.; Hattawy, M.; Heddle, D.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Isupov, E. L.; Jo, H. S.; Johnston, S.; Kabir, M. L.; Keller, D.; Khachatryan, G.; Khachatryan, M.; Khandaker, M.; Kim, A.; Kim, W.; Klein, A.; Klein, F. J.; Kubarovsky, V.; Lenisa, P.; Livingston, K.; MacGregor, I. J.D.; Markov, N.; McKinnon, B.; Mineeva, T.; Montgomery, R. A.; Munoz Camacho, C.; Niculescu, G.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Paremuzyan, R.; Park, K.; Pasyuk, E.; Phelps, W.; Pogorelko, O.; Price, J. W.; Prok, Y.; Protopopescu, D.; Ripani, M.; Rizzo, A.; Rosner, G.; Sabatié, F.; Salgado, C.; Schumacher, R. A.; Sharabian, Y.; Skorodumina, Iu; Smith, G. D.; Sokhan, D.; Sparveris, N.; Stepanyan, S.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Tan, J. A.; Ungaro, M.; Voskanyan, H.; Voutier, E.; Wang, R.; Wei, X.; Wood, M. H.; Zachariou, N.; Zana, L.; Zhang, J.; Zhao, Z. W.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 783, 10.08.2018, p. 280-286.

Research output: Contribution to journalArticle

Bono, J, Guo, L, Raue, BA, Adhikari, S, Kunkel, MC, Adhikari, KP, Akbar, Z, Amaryan, MJ, Ball, J, Barion, L, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, AS, Brooks, WK, Burkert, VD, Cao, F, Carman, DS, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clary, BA, Cole, PL, Contalbrigo, M, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, Defurne, M, Deur, A, Diehl, S, Djalali, C, Dugger, M, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fedotov, G, Filippi, A, Fradi, A, Gavalian, G, Gevorgyan, N, Ghandilyan, Y, Girod, FX, Glazier, DI, Gohn, W, Golovatch, E, Gothe, RW, Griffioen, KA, Hafidi, K, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, DG, Isupov, EL, Jo, HS, Johnston, S, Kabir, ML, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, FJ, Kubarovsky, V, Lenisa, P, Livingston, K, MacGregor, IJD, Markov, N, McKinnon, B, Mineeva, T, Montgomery, RA, Munoz Camacho, C, Niculescu, G, Osipenko, M, Ostrovidov, AI, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pogorelko, O, Price, JW, Prok, Y, Protopopescu, D, Ripani, M, Rizzo, A, Rosner, G, Sabatié, F, Salgado, C, Schumacher, RA, Sharabian, Y, Skorodumina, I, Smith, GD, Sokhan, D, Sparveris, N, Stepanyan, S, Strakovsky, II, Strauch, S, Taiuti, M, Tan, JA, Ungaro, M, Voskanyan, H, Voutier, E, Wang, R, Wei, X, Wood, MH, Zachariou, N, Zana, L, Zhang, J & Zhao, ZW 2018, 'First measurement of Ξ polarization in photoproduction' Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 783, pp. 280-286. https://doi.org/10.1016/j.physletb.2018.07.004
Bono, J. ; Guo, L. ; Raue, B. A. ; Adhikari, S. ; Kunkel, M. C. ; Adhikari, K. P. ; Akbar, Z. ; Amaryan, M. J. ; Ball, J. ; Barion, L. ; Bashkanov, M. ; Battaglieri, M. ; Batourine, V. ; Bedlinskiy, I. ; Biselli, A. S. ; Brooks, W. K. ; Burkert, V. D. ; Cao, F. ; Carman, D. S. ; Celentano, A. ; Charles, G. ; Chetry, T. ; Ciullo, G. ; Clary, Brandon A. ; Cole, P. L. ; Contalbrigo, M. ; Crede, V. ; D'Angelo, A. ; Dashyan, N. ; De Vita, R. ; Defurne, M. ; Deur, A. ; Diehl, S. ; Djalali, C. ; Dugger, Michael ; Egiyan, H. ; El Alaoui, A. ; El Fassi, L. ; Eugenio, P. ; Fedotov, G. ; Filippi, A. ; Fradi, A. ; Gavalian, G. ; Gevorgyan, N. ; Ghandilyan, Y. ; Girod, F. X. ; Glazier, D. I. ; Gohn, W. ; Golovatch, E. ; Gothe, R. W. ; Griffioen, K. A. ; Hafidi, K. ; Harrison, N. ; Hattawy, M. ; Heddle, D. ; Hicks, K. ; Holtrop, M. ; Ilieva, Y. ; Ireland, D. G. ; Isupov, E. L. ; Jo, H. S. ; Johnston, S. ; Kabir, M. L. ; Keller, D. ; Khachatryan, G. ; Khachatryan, M. ; Khandaker, M. ; Kim, A. ; Kim, W. ; Klein, A. ; Klein, F. J. ; Kubarovsky, V. ; Lenisa, P. ; Livingston, K. ; MacGregor, I. J.D. ; Markov, N. ; McKinnon, B. ; Mineeva, T. ; Montgomery, R. A. ; Munoz Camacho, C. ; Niculescu, G. ; Osipenko, M. ; Ostrovidov, A. I. ; Paolone, M. ; Paremuzyan, R. ; Park, K. ; Pasyuk, E. ; Phelps, W. ; Pogorelko, O. ; Price, J. W. ; Prok, Y. ; Protopopescu, D. ; Ripani, M. ; Rizzo, A. ; Rosner, G. ; Sabatié, F. ; Salgado, C. ; Schumacher, R. A. ; Sharabian, Y. ; Skorodumina, Iu ; Smith, G. D. ; Sokhan, D. ; Sparveris, N. ; Stepanyan, S. ; Strakovsky, I. I. ; Strauch, S. ; Taiuti, M. ; Tan, J. A. ; Ungaro, M. ; Voskanyan, H. ; Voutier, E. ; Wang, R. ; Wei, X. ; Wood, M. H. ; Zachariou, N. ; Zana, L. ; Zhang, J. ; Zhao, Z. W. / First measurement of Ξ polarization in photoproduction. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2018 ; Vol. 783. pp. 280-286.
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title = "First measurement of Ξ− polarization in photoproduction",
abstract = "Despite decades of studies of the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely unknown. While the parity-violating weak decay of hyperons offers a means of measuring their polarization, which could help discern their production mechanisms and identify their excitation spectra, no such study has been possible for doubly strange baryons in photoproduction, due to low production cross sections. However, by making use of the reaction γp→K+K+Ξ−, we have measured, for the first time, the induced polarization, P, and the transferred polarization from circularly polarized real photons, characterized by Cx and Cz, to recoiling Ξ−s. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab for photon energies from just over threshold (2.4 GeV) to 5.45 GeV. These first-time measurements are compared, and are shown to broadly agree, with model predictions in which cascade photoproduction proceeds through the decay of intermediate hyperon resonances that are produced via relativistic meson exchange, offering a new step forward in the understanding of the production and polarization of doubly-strange baryons.",
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TY - JOUR

T1 - First measurement of Ξ− polarization in photoproduction

AU - Bono, J.

AU - Guo, L.

AU - Raue, B. A.

AU - Adhikari, S.

AU - Kunkel, M. C.

AU - Adhikari, K. P.

AU - Akbar, Z.

AU - Amaryan, M. J.

AU - Ball, J.

AU - Barion, L.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Cao, F.

AU - Carman, D. S.

AU - Celentano, A.

AU - Charles, G.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clary, Brandon A.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - Defurne, M.

AU - Deur, A.

AU - Diehl, S.

AU - Djalali, C.

AU - Dugger, Michael

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Filippi, A.

AU - Fradi, A.

AU - Gavalian, G.

AU - Gevorgyan, N.

AU - Ghandilyan, Y.

AU - Girod, F. X.

AU - Glazier, D. I.

AU - Gohn, W.

AU - Golovatch, E.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Hafidi, K.

AU - Harrison, N.

AU - Hattawy, M.

AU - Heddle, D.

AU - Hicks, K.

AU - Holtrop, M.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Isupov, E. L.

AU - Jo, H. S.

AU - Johnston, S.

AU - Kabir, M. L.

AU - Keller, D.

AU - Khachatryan, G.

AU - Khachatryan, M.

AU - Khandaker, M.

AU - Kim, A.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Kubarovsky, V.

AU - Lenisa, P.

AU - Livingston, K.

AU - MacGregor, I. J.D.

AU - Markov, N.

AU - McKinnon, B.

AU - Mineeva, T.

AU - Montgomery, R. A.

AU - Munoz Camacho, C.

AU - Niculescu, G.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Paolone, M.

AU - Paremuzyan, R.

AU - Park, K.

AU - Pasyuk, E.

AU - Phelps, W.

AU - Pogorelko, O.

AU - Price, J. W.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Ripani, M.

AU - Rizzo, A.

AU - Rosner, G.

AU - Sabatié, F.

AU - Salgado, C.

AU - Schumacher, R. A.

AU - Sharabian, Y.

AU - Skorodumina, Iu

AU - Smith, G. D.

AU - Sokhan, D.

AU - Sparveris, N.

AU - Stepanyan, S.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tan, J. A.

AU - Ungaro, M.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Wang, R.

AU - Wei, X.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, Z. W.

PY - 2018/8/10

Y1 - 2018/8/10

N2 - Despite decades of studies of the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely unknown. While the parity-violating weak decay of hyperons offers a means of measuring their polarization, which could help discern their production mechanisms and identify their excitation spectra, no such study has been possible for doubly strange baryons in photoproduction, due to low production cross sections. However, by making use of the reaction γp→K+K+Ξ−, we have measured, for the first time, the induced polarization, P, and the transferred polarization from circularly polarized real photons, characterized by Cx and Cz, to recoiling Ξ−s. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab for photon energies from just over threshold (2.4 GeV) to 5.45 GeV. These first-time measurements are compared, and are shown to broadly agree, with model predictions in which cascade photoproduction proceeds through the decay of intermediate hyperon resonances that are produced via relativistic meson exchange, offering a new step forward in the understanding of the production and polarization of doubly-strange baryons.

AB - Despite decades of studies of the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely unknown. While the parity-violating weak decay of hyperons offers a means of measuring their polarization, which could help discern their production mechanisms and identify their excitation spectra, no such study has been possible for doubly strange baryons in photoproduction, due to low production cross sections. However, by making use of the reaction γp→K+K+Ξ−, we have measured, for the first time, the induced polarization, P, and the transferred polarization from circularly polarized real photons, characterized by Cx and Cz, to recoiling Ξ−s. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab for photon energies from just over threshold (2.4 GeV) to 5.45 GeV. These first-time measurements are compared, and are shown to broadly agree, with model predictions in which cascade photoproduction proceeds through the decay of intermediate hyperon resonances that are produced via relativistic meson exchange, offering a new step forward in the understanding of the production and polarization of doubly-strange baryons.

KW - Cascade

KW - Hyperon spectroscopy

KW - Photoproduction

KW - Polarization

KW - Strange

KW - Xi

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UR - http://www.scopus.com/inward/citedby.url?scp=85049752775&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2018.07.004

DO - 10.1016/j.physletb.2018.07.004

M3 - Article

VL - 783

SP - 280

EP - 286

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

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

SN - 0370-2693

ER -