Spin and parity measurement of the Λ (1405) baryon

K. Moriya, R. A. Schumacher, M. Aghasyan, M. J. Amaryan, M. D. Anderson, S. Anefalos Pereira, J. Ball, N. A. Baltzell, M. Battaglieri, M. Bellis, A. S. Biselli, J. Bono, S. Boiarinov, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. Carman, A. Celentano, S. Chandavar, G. CharlesP. L. Cole, P. Collins, M. Contalbrigo, O. Cortes, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, E. De Sanctis, B. Dey, C. Djalali, Michael Dugger, R. Dupré, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, S. Fegan, J. A. Fleming, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, W. Gohn, E. Golovatch, R. W. Gothe, M. Guidal, K. A. Griffioen, K. Hafidi, H. Hakobyan, K. Hicks, M. Holtrop, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, H. S. Jo, K. Joo, D. Keller, M. Khandaker, W. Kim, S. Koirala, V. Kubarovsky, S. V. Kuleshov, P. Lenisa, H. Y. Lu, I. J D Macgregor, N. Markov, M. McCracken, B. McKinnon, M. D. Mestayer, C. A. Meyer, M. Mirazita, V. Mokeev, R. A. Montgomery, H. Moutarde, E. Munevar, P. Nadel-Turonski, S. Niccolai, I. Niculescu, M. Osipenko, L. L. Pappalardo, E. Pasyuk, P. Peng, J. J. Phillips, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, A. J R Puckett, B. A. Raue, D. Rimal, M. Ripani, Barry Ritchie, A. Rizzo, G. Rosner, P. Roy, F. Sabatié, C. Salgado, D. Schott, E. Seder, I. Senderovich, E. S. Smith, D. Sokhan, G. D. Smith, S. Stepanyan, S. Strauch, W. Tang, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Watts, L. B. Weinstein, M. Williams, M. H. Wood, N. Zachariou, L. Zana, J. Zhang, V. Ziegler, Z. W. Zhao, I. Zonta

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A determination of the spin and parity of the Λ(1405) is presented using photoproduction data from the CLAS detector at Jefferson Lab. The reaction γ+p→K++Λ(1405) is analyzed in the decay channel Λ(1405)→Σ++π-, where the decay distribution to Σ+π- and the variation of the Σ+ polarization with respect to the Λ(1405) polarization direction determines the parity. The Λ(1405) is produced, in the energy range 2.55<W<2.85 GeV and for 0.6<cosθK+c.m.<0.9, with polarization P=0.45±0.02(stat) ±0.07(syst). The analysis shows that the decays are in S wave, with the Σ+ polarized such that the Λ(1405) has spin-parity JP=12-, as expected by most theories.

Original languageEnglish (US)
Article number082004
JournalPhysical Review Letters
Volume112
Issue number8
DOIs
StatePublished - Feb 28 2014

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baryons
parity
decay
polarization
photoproduction
S waves
detectors
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Moriya, K., Schumacher, R. A., Aghasyan, M., Amaryan, M. J., Anderson, M. D., Anefalos Pereira, S., ... Zonta, I. (2014). Spin and parity measurement of the Λ (1405) baryon. Physical Review Letters, 112(8), [082004]. https://doi.org/10.1103/PhysRevLett.112.082004

Spin and parity measurement of the Λ (1405) baryon. / Moriya, K.; Schumacher, R. A.; Aghasyan, M.; Amaryan, M. J.; Anderson, M. D.; Anefalos Pereira, S.; Ball, J.; Baltzell, N. A.; Battaglieri, M.; Bellis, M.; Biselli, A. S.; Bono, J.; Boiarinov, S.; Briscoe, W. J.; Brooks, W. K.; Burkert, V. D.; Carman, D. S.; Celentano, A.; Chandavar, S.; Charles, G.; Cole, P. L.; Collins, P.; Contalbrigo, M.; Cortes, O.; Crede, V.; D'Angelo, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Dey, B.; Djalali, C.; Dugger, Michael; Dupré, R.; Egiyan, H.; El Alaoui, A.; El Fassi, L.; Elouadrhiri, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Fleming, J. A.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Gohn, W.; Golovatch, E.; Gothe, R. W.; Guidal, M.; Griffioen, K. A.; Hafidi, K.; Hakobyan, H.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jo, H. S.; Joo, K.; Keller, D.; Khandaker, M.; Kim, W.; Koirala, S.; Kubarovsky, V.; Kuleshov, S. V.; Lenisa, P.; Lu, H. Y.; Macgregor, I. J D; Markov, N.; McCracken, M.; McKinnon, B.; Mestayer, M. D.; Meyer, C. A.; Mirazita, M.; Mokeev, V.; Montgomery, R. A.; Moutarde, H.; Munevar, E.; Nadel-Turonski, P.; Niccolai, S.; Niculescu, I.; Osipenko, M.; Pappalardo, L. L.; Pasyuk, E.; Peng, P.; Phillips, J. J.; Pisano, S.; Pogorelko, O.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Puckett, A. J R; Raue, B. A.; Rimal, D.; Ripani, M.; Ritchie, Barry; Rizzo, A.; Rosner, G.; Roy, P.; Sabatié, F.; Salgado, C.; Schott, D.; Seder, E.; Senderovich, I.; Smith, E. S.; Sokhan, D.; Smith, G. D.; Stepanyan, S.; Strauch, S.; Tang, W.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Watts, D. P.; Weinstein, L. B.; Williams, M.; Wood, M. H.; Zachariou, N.; Zana, L.; Zhang, J.; Ziegler, V.; Zhao, Z. W.; Zonta, I.

In: Physical Review Letters, Vol. 112, No. 8, 082004, 28.02.2014.

Research output: Contribution to journalArticle

Moriya, K, Schumacher, RA, Aghasyan, M, Amaryan, MJ, Anderson, MD, Anefalos Pereira, S, Ball, J, Baltzell, NA, Battaglieri, M, Bellis, M, Biselli, AS, Bono, J, Boiarinov, S, Briscoe, WJ, Brooks, WK, Burkert, VD, Carman, DS, Celentano, A, Chandavar, S, Charles, G, Cole, PL, Collins, P, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Dey, B, Djalali, C, Dugger, M, Dupré, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Fleming, JA, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Gohn, W, Golovatch, E, Gothe, RW, Guidal, M, Griffioen, KA, Hafidi, K, Hakobyan, H, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Jo, HS, Joo, K, Keller, D, Khandaker, M, Kim, W, Koirala, S, Kubarovsky, V, Kuleshov, SV, Lenisa, P, Lu, HY, Macgregor, IJD, Markov, N, McCracken, M, McKinnon, B, Mestayer, MD, Meyer, CA, Mirazita, M, Mokeev, V, Montgomery, RA, Moutarde, H, Munevar, E, Nadel-Turonski, P, Niccolai, S, Niculescu, I, Osipenko, M, Pappalardo, LL, Pasyuk, E, Peng, P, Phillips, JJ, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Puckett, AJR, Raue, BA, Rimal, D, Ripani, M, Ritchie, B, Rizzo, A, Rosner, G, Roy, P, Sabatié, F, Salgado, C, Schott, D, Seder, E, Senderovich, I, Smith, ES, Sokhan, D, Smith, GD, Stepanyan, S, Strauch, S, Tang, W, Voskanyan, H, Voutier, E, Walford, NK, Watts, DP, Weinstein, LB, Williams, M, Wood, MH, Zachariou, N, Zana, L, Zhang, J, Ziegler, V, Zhao, ZW & Zonta, I 2014, 'Spin and parity measurement of the Λ (1405) baryon', Physical Review Letters, vol. 112, no. 8, 082004. https://doi.org/10.1103/PhysRevLett.112.082004
Moriya K, Schumacher RA, Aghasyan M, Amaryan MJ, Anderson MD, Anefalos Pereira S et al. Spin and parity measurement of the Λ (1405) baryon. Physical Review Letters. 2014 Feb 28;112(8). 082004. https://doi.org/10.1103/PhysRevLett.112.082004
Moriya, K. ; Schumacher, R. A. ; Aghasyan, M. ; Amaryan, M. J. ; Anderson, M. D. ; Anefalos Pereira, S. ; Ball, J. ; Baltzell, N. A. ; Battaglieri, M. ; Bellis, M. ; Biselli, A. S. ; Bono, J. ; Boiarinov, S. ; Briscoe, W. J. ; Brooks, W. K. ; Burkert, V. D. ; Carman, D. S. ; Celentano, A. ; Chandavar, S. ; Charles, G. ; Cole, P. L. ; Collins, P. ; Contalbrigo, M. ; Cortes, O. ; Crede, V. ; D'Angelo, A. ; Dashyan, N. ; De Vita, R. ; De Sanctis, E. ; Dey, B. ; Djalali, C. ; Dugger, Michael ; Dupré, R. ; Egiyan, H. ; El Alaoui, A. ; El Fassi, L. ; Elouadrhiri, L. ; Eugenio, P. ; Fedotov, G. ; Fegan, S. ; Fleming, J. A. ; Gilfoyle, G. P. ; Giovanetti, K. L. ; Girod, F. X. ; Gohn, W. ; Golovatch, E. ; Gothe, R. W. ; Guidal, M. ; Griffioen, K. A. ; Hafidi, K. ; Hakobyan, H. ; Hicks, K. ; Holtrop, M. ; Ilieva, Y. ; Ireland, D. G. ; Ishkhanov, B. S. ; Isupov, E. L. ; Jo, H. S. ; Joo, K. ; Keller, D. ; Khandaker, M. ; Kim, W. ; Koirala, S. ; Kubarovsky, V. ; Kuleshov, S. V. ; Lenisa, P. ; Lu, H. Y. ; Macgregor, I. J D ; Markov, N. ; McCracken, M. ; McKinnon, B. ; Mestayer, M. D. ; Meyer, C. A. ; Mirazita, M. ; Mokeev, V. ; Montgomery, R. A. ; Moutarde, H. ; Munevar, E. ; Nadel-Turonski, P. ; Niccolai, S. ; Niculescu, I. ; Osipenko, M. ; Pappalardo, L. L. ; Pasyuk, E. ; Peng, P. ; Phillips, J. J. ; Pisano, S. ; Pogorelko, O. ; Pozdniakov, S. ; Price, J. W. ; Procureur, S. ; Puckett, A. J R ; Raue, B. A. ; Rimal, D. ; Ripani, M. ; Ritchie, Barry ; Rizzo, A. ; Rosner, G. ; Roy, P. ; Sabatié, F. ; Salgado, C. ; Schott, D. ; Seder, E. ; Senderovich, I. ; Smith, E. S. ; Sokhan, D. ; Smith, G. D. ; Stepanyan, S. ; Strauch, S. ; Tang, W. ; Voskanyan, H. ; Voutier, E. ; Walford, N. K. ; Watts, D. P. ; Weinstein, L. B. ; Williams, M. ; Wood, M. H. ; Zachariou, N. ; Zana, L. ; Zhang, J. ; Ziegler, V. ; Zhao, Z. W. ; Zonta, I. / Spin and parity measurement of the Λ (1405) baryon. In: Physical Review Letters. 2014 ; Vol. 112, No. 8.
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abstract = "A determination of the spin and parity of the Λ(1405) is presented using photoproduction data from the CLAS detector at Jefferson Lab. The reaction γ+p→K++Λ(1405) is analyzed in the decay channel Λ(1405)→Σ++π-, where the decay distribution to Σ+π- and the variation of the Σ+ polarization with respect to the Λ(1405) polarization direction determines the parity. The Λ(1405) is produced, in the energy range 2.55<W<2.85 GeV and for 0.6",
author = "K. Moriya and Schumacher, {R. A.} and M. Aghasyan and Amaryan, {M. J.} and Anderson, {M. D.} and {Anefalos Pereira}, S. and J. Ball and Baltzell, {N. A.} and M. Battaglieri and M. Bellis and Biselli, {A. S.} and J. Bono and S. Boiarinov and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and Carman, {D. S.} and A. Celentano and S. Chandavar and G. Charles and Cole, {P. L.} and P. Collins 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 B. Dey and C. Djalali and Michael Dugger and R. Dupr{\'e} and H. Egiyan and {El Alaoui}, A. and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and S. Fegan and Fleming, {J. A.} and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and W. Gohn and E. Golovatch and Gothe, {R. W.} and M. Guidal and Griffioen, {K. A.} and K. Hafidi and H. Hakobyan and K. Hicks and M. Holtrop and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and Jo, {H. S.} and K. Joo and D. Keller and M. Khandaker and W. Kim and S. Koirala and V. Kubarovsky and Kuleshov, {S. V.} and P. Lenisa and Lu, {H. Y.} and Macgregor, {I. J D} and N. Markov and M. McCracken and B. McKinnon and Mestayer, {M. D.} and Meyer, {C. A.} and M. Mirazita and V. Mokeev and Montgomery, {R. A.} and H. Moutarde and E. Munevar and P. Nadel-Turonski and S. Niccolai and I. Niculescu and M. Osipenko and Pappalardo, {L. L.} and E. Pasyuk and P. Peng and Phillips, {J. J.} and S. Pisano and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and S. Procureur and Puckett, {A. J R} and Raue, {B. A.} and D. Rimal and M. Ripani and Barry Ritchie and A. Rizzo and G. Rosner and P. Roy and F. Sabati{\'e} and C. Salgado and D. Schott and E. Seder and I. Senderovich and Smith, {E. S.} and D. Sokhan and Smith, {G. D.} and S. Stepanyan and S. Strauch and W. Tang and H. Voskanyan and E. Voutier and Walford, {N. K.} and Watts, {D. P.} and Weinstein, {L. B.} and M. Williams and Wood, {M. H.} and N. Zachariou and L. Zana and J. Zhang and V. Ziegler and Zhao, {Z. W.} and I. Zonta",
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AU - Moriya, K.

AU - Schumacher, R. A.

AU - Aghasyan, M.

AU - Amaryan, M. J.

AU - Anderson, M. D.

AU - Anefalos Pereira, S.

AU - Ball, J.

AU - Baltzell, N. A.

AU - Battaglieri, M.

AU - Bellis, M.

AU - Biselli, A. S.

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AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Cole, P. L.

AU - Collins, P.

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 - Dey, B.

AU - Djalali, C.

AU - Dugger, Michael

AU - Dupré, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fegan, S.

AU - Fleming, J. A.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Gohn, W.

AU - Golovatch, E.

AU - Gothe, R. W.

AU - Guidal, M.

AU - Griffioen, K. A.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hicks, K.

AU - Holtrop, M.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Jo, H. S.

AU - Joo, K.

AU - Keller, D.

AU - Khandaker, M.

AU - Kim, W.

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AU - Montgomery, R. A.

AU - Moutarde, H.

AU - Munevar, E.

AU - Nadel-Turonski, P.

AU - Niccolai, S.

AU - Niculescu, I.

AU - Osipenko, M.

AU - Pappalardo, L. L.

AU - Pasyuk, E.

AU - Peng, P.

AU - Phillips, J. J.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Puckett, A. J R

AU - Raue, B. A.

AU - Rimal, D.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Rizzo, A.

AU - Rosner, G.

AU - Roy, P.

AU - Sabatié, F.

AU - Salgado, C.

AU - Schott, D.

AU - Seder, E.

AU - Senderovich, I.

AU - Smith, E. S.

AU - Sokhan, D.

AU - Smith, G. D.

AU - Stepanyan, S.

AU - Strauch, S.

AU - Tang, W.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Walford, N. K.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Williams, M.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zana, L.

AU - Zhang, J.

AU - Ziegler, V.

AU - Zhao, Z. W.

AU - Zonta, I.

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AB - A determination of the spin and parity of the Λ(1405) is presented using photoproduction data from the CLAS detector at Jefferson Lab. The reaction γ+p→K++Λ(1405) is analyzed in the decay channel Λ(1405)→Σ++π-, where the decay distribution to Σ+π- and the variation of the Σ+ polarization with respect to the Λ(1405) polarization direction determines the parity. The Λ(1405) is produced, in the energy range 2.55<W<2.85 GeV and for 0.6

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