First observation of the Λ(1405) line shape in electroproduction

H. Y. Lu; R. A. Schumacher; K. P. Adhikari; D. Adikaram; M. Aghasyan; M. J. Amaryan; S. Anefalos Pereira; J. Ball; M. Battaglieri; V. Batourine; I. Bedlinskiy; A. S. Biselli; S. Boiarinov; W. J. Briscoe; W. K. Brooks; V. D. Burkert; D. S. Carman; A. Celentano; S. Chandavar; P. L. Cole; P. Collins; M. Contalbrigo; O. Cortes; V. Crede; A. D'Angelo; N. Dashyan; R. De Vita; E. De Sanctis; A. Deur; C. Djalali; D. Doughty; R. Dupre; H. Egiyan; A. El Alaoui; L. El Fassi; P. Eugenio; G. Fedotov; S. Fegan; J. A. Fleming; M. Gabrielyan; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; W. Gohn; E. Golovatch; R. W. Gothe; K. A. Griffioen; M. Guidal; L. Guo; K. Hafidi; H. Hakobyan; N. Harrison; D. Heddle; K. Hicks; D. Ho; M. Holtrop; C. E. Hyde; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; H. S. Jo; K. Joo; D. Keller; M. Khandaker; W. Kim; A. Klein; F. J. Klein; S. Koirala; A. Kubarovsky; V. Kubarovsky; S. V. Kuleshov; S. Lewis; K. Livingston; I. J.D. Macgregor; D. Martinez; M. Mayer; B. McKinnon; C. A. Meyer; T. Mineeva; M. Mirazita; V. Mokeev; R. A. Montgomery; K. Moriya; H. Moutarde; E. Munevar; C. Munoz Camacho; P. Nadel-Turonski; C. S. Nepali; S. Niccolai; G. Niculescu; I. Niculescu; M. Osipenko; A. I. Ostrovidov; L. L. Pappalardo; R. Paremuzyan; K. Park; S. Park; E. Pasyuk; P. Peng; E. Phelps; J. J. Phillips; S. Pisano; O. Pogorelko; S. Pozdniakov; J. W. Price; S. Procureur; Y. Prok; D. Protopopescu; A. J.R. Puckett; B. A. Raue; D. Rimal; M. Ripani; G. Rosner; P. Rossi; F. Sabatié; M. S. Saini; C. Salgado; D. Schott; E. Seder; H. Seraydaryan; Y. G. Sharabian; G. D. Smith; D. I. Sober; D. Sokhan; S. S. Stepanyan; P. Stoler; S. Strauch; M. Taiuti; W. Tang; Ye Tian; S. Tkachenko; B. Torayev; B. Vernarsky; H. Voskanyan; E. Voutier; N. K. Walford; D. P. Weygand; M. H. Wood; N. Zachariou; L. Zana; J. Zhang; Z. W. Zhao

doi:10.1103/PhysRevC.88.045202

First observation of the Λ(1405) line shape in electroproduction

H. Y. Lu, R. A. Schumacher, K. P. Adhikari, D. Adikaram, M. Aghasyan, M. J. Amaryan, S. Anefalos Pereira, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, S. Boiarinov, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. Carman, A. Celentano, S. Chandavar, P. L. ColeP. Collins, M. Contalbrigo, O. Cortes, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, D. Doughty, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, S. Fegan, J. A. Fleming, M. Gabrielyan, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, K. Hafidi, H. Hakobyan, N. Harrison, D. Heddle, K. Hicks, D. Ho, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, H. S. Jo, K. Joo, D. Keller, M. Khandaker, W. Kim, A. Klein, F. J. Klein, S. Koirala, A. Kubarovsky, V. Kubarovsky, S. V. Kuleshov, S. Lewis, K. Livingston, I. J.D. Macgregor, D. Martinez, M. Mayer, B. McKinnon, C. A. Meyer, T. Mineeva, M. Mirazita, V. Mokeev, R. A. Montgomery, K. Moriya, H. Moutarde, E. Munevar, C. Munoz Camacho, P. Nadel-Turonski, C. S. Nepali, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, L. L. Pappalardo, R. Paremuzyan, K. Park, S. Park, E. Pasyuk, P. Peng, E. Phelps, J. J. Phillips, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, A. J.R. Puckett, B. A. Raue, D. Rimal, M. Ripani, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, C. Salgado, D. Schott, E. Seder, H. Seraydaryan, Y. G. Sharabian, G. D. Smith, D. I. Sober, D. Sokhan, S. S. Stepanyan, P. Stoler, S. Strauch, M. Taiuti, W. Tang, Ye Tian, S. Tkachenko, B. Torayev, B. Vernarsky, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Weygand, M. H. Wood, N. Zachariou, L. Zana, J. Zhang, Z. W. Zhao

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Abstract

We report the first observation of the line shape of the Λ(1405) from electroproduction, and show that it is not a simple Breit-Wigner resonance. Electroproduction of K⁺Λ(1405) off the proton was studied by using data from CLAS at Jefferson Lab in the range 1.0<Q2<3.0 (GeV/c)2. The analysis utilized the decay channels Σ⁺π^- of the Λ(1405) and pπ0 of the Σ⁺. Neither the standard Particle Data Group resonance parameters, nor free parameters fitting to a single Breit-Wigner resonance represent the line shape. In our fits, the line shape corresponds approximately to predictions of a two-pole meson-baryon picture of the Λ(1405), with a lower mass pole near 1368 MeV/c2 and a higher mass pole near 1423 MeV/c2. Furthermore, with increasing photon virtuality the mass distribution shifts toward the higher mass pole.

Original language	English
Article number	045202
Journal	Physical Review C - Nuclear Physics
Volume	88
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.88.045202
State	Published - 17 Oct 2013

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10.1103/PhysRevC.88.045202

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Lu, H. Y., Schumacher, R. A., Adhikari, K. P., Adikaram, D., Aghasyan, M., Amaryan, M. J., Pereira, S. A., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., ... Zhao, Z. W. (2013). First observation of the Λ(1405) line shape in electroproduction. Physical Review C - Nuclear Physics, 88(4), Article 045202. https://doi.org/10.1103/PhysRevC.88.045202

@article{6b03abee778445629c71179e3c5c16eb,

title = "First observation of the Λ(1405) line shape in electroproduction",

abstract = "We report the first observation of the line shape of the Λ(1405) from electroproduction, and show that it is not a simple Breit-Wigner resonance. Electroproduction of K+Λ(1405) off the proton was studied by using data from CLAS at Jefferson Lab in the range 1.0+π- of the Λ(1405) and pπ0 of the Σ+. Neither the standard Particle Data Group resonance parameters, nor free parameters fitting to a single Breit-Wigner resonance represent the line shape. In our fits, the line shape corresponds approximately to predictions of a two-pole meson-baryon picture of the Λ(1405), with a lower mass pole near 1368 MeV/c2 and a higher mass pole near 1423 MeV/c2. Furthermore, with increasing photon virtuality the mass distribution shifts toward the higher mass pole.",

author = "Lu, {H. Y.} and Schumacher, {R. A.} and Adhikari, {K. P.} and D. Adikaram and M. Aghasyan and Amaryan, {M. J.} and Pereira, {S. Anefalos} and J. Ball and M. Battaglieri and V. Batourine and I. Bedlinskiy and Biselli, {A. S.} 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 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 A. Deur and C. Djalali and D. Doughty and R. Dupre and H. Egiyan and Alaoui, {A. El} and Fassi, {L. El} and P. Eugenio and G. Fedotov and S. Fegan and Fleming, {J. A.} and M. Gabrielyan and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Goetz, {J. T.} and W. Gohn and E. Golovatch and Gothe, {R. W.} and Griffioen, {K. A.} and M. Guidal and L. Guo and K. Hafidi and H. Hakobyan and N. Harrison and D. Heddle and K. Hicks and D. Ho and M. Holtrop and Hyde, {C. E.} 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 A. Klein and Klein, {F. J.} and S. Koirala and A. Kubarovsky and V. Kubarovsky and Kuleshov, {S. V.} and S. Lewis and K. Livingston and Macgregor, {I. J.D.} and D. Martinez and M. Mayer and B. McKinnon and Meyer, {C. A.} and T. Mineeva and M. Mirazita and V. Mokeev and Montgomery, {R. A.} and K. Moriya and H. Moutarde and E. Munevar and Camacho, {C. Munoz} and P. Nadel-Turonski and Nepali, {C. S.} and S. Niccolai and G. Niculescu and I. Niculescu and M. Osipenko and Ostrovidov, {A. I.} and Pappalardo, {L. L.} and R. Paremuzyan and K. Park and S. Park and E. Pasyuk and P. Peng and E. Phelps and Phillips, {J. J.} and S. Pisano and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and S. Procureur and Y. Prok and D. Protopopescu and Puckett, {A. J.R.} and Raue, {B. A.} and D. Rimal and M. Ripani and G. Rosner and P. Rossi and F. Sabati{\'e} and Saini, {M. S.} and C. Salgado and D. Schott and E. Seder and H. Seraydaryan and Sharabian, {Y. G.} and Smith, {G. D.} and Sober, {D. I.} and D. Sokhan and Stepanyan, {S. S.} and P. Stoler and S. Strauch and M. Taiuti and W. Tang and Ye Tian and S. Tkachenko and B. Torayev and B. Vernarsky and H. Voskanyan and E. Voutier and Walford, {N. K.} and Weygand, {D. P.} and Wood, {M. H.} and N. Zachariou and L. Zana and J. Zhang and Zhao, {Z. W.}",

year = "2013",

month = oct,

day = "17",

doi = "10.1103/PhysRevC.88.045202",

language = "English",

volume = "88",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

Lu, HY, Schumacher, RA, Adhikari, KP, Adikaram, D, Aghasyan, M, Amaryan, MJ, Pereira, SA, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, AS, Boiarinov, S, Briscoe, WJ, Brooks, WK, Burkert, VD, Carman, DS, Celentano, A, Chandavar, S, Cole, PL, Collins, P, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, Alaoui, AE, Fassi, LE, Eugenio, P, Fedotov, G, Fegan, S, Fleming, JA, Gabrielyan, M, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gohn, W, Golovatch, E, Gothe, RW, Griffioen, KA, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Harrison, N, Heddle, D, Hicks, K, Ho, D, Holtrop, M, Hyde, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Jo, HS, Joo, K, Keller, D, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Koirala, S, Kubarovsky, A, Kubarovsky, V, Kuleshov, SV, Lewis, S, Livingston, K, Macgregor, IJD, Martinez, D, Mayer, M, McKinnon, B, Meyer, CA, Mineeva, T, Mirazita, M, Mokeev, V, Montgomery, RA, Moriya, K, Moutarde, H, Munevar, E, Camacho, CM, Nadel-Turonski, P, Nepali, CS, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, AI, Pappalardo, LL, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Peng, P, Phelps, E, Phillips, JJ, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Puckett, AJR, Raue, BA, Rimal, D, Ripani, M, Rosner, G, Rossi, P, Sabatié, F, Saini, MS, Salgado, C, Schott, D, Seder, E, Seraydaryan, H, Sharabian, YG, Smith, GD, Sober, DI, Sokhan, D, Stepanyan, SS, Stoler, P, Strauch, S, Taiuti, M, Tang, W, Tian, Y, Tkachenko, S, Torayev, B, Vernarsky, B, Voskanyan, H, Voutier, E, Walford, NK, Weygand, DP, Wood, MH, Zachariou, N, Zana, L, Zhang, J & Zhao, ZW 2013, 'First observation of the Λ(1405) line shape in electroproduction', Physical Review C - Nuclear Physics, vol. 88, no. 4, 045202. https://doi.org/10.1103/PhysRevC.88.045202

TY - JOUR

T1 - First observation of the Λ(1405) line shape in electroproduction

AU - Lu, H. Y.

AU - Schumacher, R. A.

AU - Adhikari, K. P.

AU - Adikaram, D.

AU - Aghasyan, M.

AU - Amaryan, M. J.

AU - Pereira, S. Anefalos

AU - Ball, J.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

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 - Deur, A.

AU - Djalali, C.

AU - Doughty, D.

AU - Dupre, R.

AU - Egiyan, H.

AU - Alaoui, A. El

AU - Fassi, L. El

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fegan, S.

AU - Fleming, J. A.

AU - Gabrielyan, M.

AU - Gevorgyan, N.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gohn, W.

AU - Golovatch, E.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guo, L.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Harrison, N.

AU - Heddle, D.

AU - Hicks, K.

AU - Ho, D.

AU - Holtrop, M.

AU - Hyde, C. E.

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.

AU - Klein, A.

AU - Klein, F. J.

AU - Koirala, S.

AU - Kubarovsky, A.

AU - Kubarovsky, V.

AU - Kuleshov, S. V.

AU - Lewis, S.

AU - Livingston, K.

AU - Macgregor, I. J.D.

AU - Martinez, D.

AU - Mayer, M.

AU - McKinnon, B.

AU - Meyer, C. A.

AU - Mineeva, T.

AU - Mirazita, M.

AU - Mokeev, V.

AU - Montgomery, R. A.

AU - Moriya, K.

AU - Moutarde, H.

AU - Munevar, E.

AU - Camacho, C. Munoz

AU - Nadel-Turonski, P.

AU - Nepali, C. S.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Pappalardo, L. L.

AU - Paremuzyan, R.

AU - Park, K.

AU - Park, S.

AU - Pasyuk, E.

AU - Peng, P.

AU - Phelps, E.

AU - Phillips, J. J.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Puckett, A. J.R.

AU - Raue, B. A.

AU - Rimal, D.

AU - Ripani, M.

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Saini, M. S.

AU - Salgado, C.

AU - Schott, D.

AU - Seder, E.

AU - Seraydaryan, H.

AU - Sharabian, Y. G.

AU - Smith, G. D.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stepanyan, S. S.

AU - Stoler, P.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tang, W.

AU - Tian, Ye

AU - Tkachenko, S.

AU - Torayev, B.

AU - Vernarsky, B.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Walford, N. K.

AU - Weygand, D. P.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, Z. W.

PY - 2013/10/17

Y1 - 2013/10/17

N2 - We report the first observation of the line shape of the Λ(1405) from electroproduction, and show that it is not a simple Breit-Wigner resonance. Electroproduction of K+Λ(1405) off the proton was studied by using data from CLAS at Jefferson Lab in the range 1.0+π- of the Λ(1405) and pπ0 of the Σ+. Neither the standard Particle Data Group resonance parameters, nor free parameters fitting to a single Breit-Wigner resonance represent the line shape. In our fits, the line shape corresponds approximately to predictions of a two-pole meson-baryon picture of the Λ(1405), with a lower mass pole near 1368 MeV/c2 and a higher mass pole near 1423 MeV/c2. Furthermore, with increasing photon virtuality the mass distribution shifts toward the higher mass pole.

AB - We report the first observation of the line shape of the Λ(1405) from electroproduction, and show that it is not a simple Breit-Wigner resonance. Electroproduction of K+Λ(1405) off the proton was studied by using data from CLAS at Jefferson Lab in the range 1.0+π- of the Λ(1405) and pπ0 of the Σ+. Neither the standard Particle Data Group resonance parameters, nor free parameters fitting to a single Breit-Wigner resonance represent the line shape. In our fits, the line shape corresponds approximately to predictions of a two-pole meson-baryon picture of the Λ(1405), with a lower mass pole near 1368 MeV/c2 and a higher mass pole near 1423 MeV/c2. Furthermore, with increasing photon virtuality the mass distribution shifts toward the higher mass pole.

UR - http://www.scopus.com/inward/record.url?scp=84886655020&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.88.045202

DO - 10.1103/PhysRevC.88.045202

M3 - Article

AN - SCOPUS:84886655020

SN - 0556-2813

VL - 88

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 045202

ER -

First observation of the Λ(1405) line shape in electroproduction

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