First measurement of Xi(-) polarization in photoproduction

J. Bono; L. Guo; B. A. Raue; S. Adhikari; M. C. Kunkel; K. P. Adhikari; Z. Akbar; M. J. Amaryan; L. Barion; M. Bashkanov; M. Battaglieri; V. Batourine; I. Bedlinskiy; A. S. Biselli; V. D. Burkert; F. Cao; D. S. Carman; A. Celentano; 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; M. 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; D. Sokhan; N. Sparveris; S. Stepanyan; I. I. Strakovsky; S. Strauch; M. Taiuti; M. Ungaro; H. Voskanyan; E. Voutier; N. Zachariou; L. Zana; Z. W. Zhao

doi:10.1016/j.physletb.2018.07.004

First measurement of Xi(-) polarization in photoproduction

J. Bono^*, L. Guo, B. A. Raue, S. Adhikari, M. C. Kunkel, K. P. Adhikari, Z. Akbar, M. J. Amaryan, L. Barion, M. Bashkanov, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, V. D. Burkert, F. Cao, D. S. Carman, A. Celentano, G. Charles, T. ChetryG. 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, M. 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, D. Sokhan, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, M. Taiuti, M. Ungaro, H. Voskanyan, E. Voutier, N. Zachariou, L. Zana, Z. W. Zhao

^*Corresponding author for this work

Physics

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

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 C_x and C_z, 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.

Original language	English
Pages (from-to)	280-286
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	783
Early online date	9 Jul 2018
DOIs	https://doi.org/10.1016/j.physletb.2018.07.004 https://doi.org/10.1016/j.physletb.2018.07.004
Publication status	Published - 10 Aug 2018

Bibliographical note

Keywords

Cascade
Hyperon spectroscopy
Photoproduction
Polarization
Strange
Xi

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© 2018 The Author(s). Published by Elsevier B.V.
Final published version, 846 KBLicence: CC BY-NC-ND
1-s2.0-S0370269318305392-main
©2018 The Author(s).
Final published version, 846 KBLicence: CC BY

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Bono, J., Guo, L., Raue, B. A., Adhikari, S., Kunkel, M. C., Adhikari, K. P., Akbar, Z., Amaryan, M. J., Barion, L., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Charles, G., ... Zhao, Z. W. (2018). First measurement of Xi(-) polarization in photoproduction. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 783, 280-286. https://doi.org/10.1016/j.physletb.2018.07.004, https://doi.org/10.1016/j.physletb.2018.07.004

@article{ede294d93a2640e39b4e35b4f3a2a581,

title = "First measurement of Xi(-) 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.",

keywords = "Cascade, Hyperon spectroscopy, Photoproduction, Polarization, Strange, Xi",

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

note = "{\textcopyright} 2018 The Author(s). Published by Elsevier B.V.",

year = "2018",

month = aug,

day = "10",

doi = "10.1016/j.physletb.2018.07.004",

language = "English",

volume = "783",

pages = "280--286",

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

issn = "0370-2693",

publisher = "Elsevier",

}

Bono, J, Guo, L, Raue, BA, Adhikari, S, Kunkel, MC, Adhikari, KP, Akbar, Z, Amaryan, MJ, Barion, L, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, AS, 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, Sokhan, D, Sparveris, N, Stepanyan, S, Strakovsky, II, Strauch, S, Taiuti, M, Ungaro, M, Voskanyan, H, Voutier, E, Zachariou, N, Zana, L & Zhao, ZW 2018, 'First measurement of Xi(-) 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, https://doi.org/10.1016/j.physletb.2018.07.004

TY - JOUR

T1 - First measurement of Xi(-) 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 - Barion, L.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

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, M.

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 - Sokhan, D.

AU - Sparveris, N.

AU - Stepanyan, S.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Ungaro, M.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Zachariou, N.

AU - Zana, L.

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

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

U2 - 10.1016/j.physletb.2018.07.004

DO - 10.1016/j.physletb.2018.07.004

M3 - Article

AN - SCOPUS:85049752775

SN - 0370-2693

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

ER -

First measurement of Xi(-) polarization in photoproduction

Abstract

Bibliographical note

Keywords

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