High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC

M. Moritsu; S. Adachi; M. Agnello; S. Ajimura; K. Aoki; H. C. Bhang; B. Bassalleck; E. Botta; S. Bufalino; N. Chiga; H. Ekawa; P. Evtoukhovitch; A. Feliciello; H. Fujioka; S. Hayakawa; F. Hiruma; R. Honda; K. Hosomi; Y. Ichikawa; M. Ieiri; Y. Igarashi; K. Imai; N. Ishibashi; S. Ishimoto; K. Itahashi; R. Iwasaki; C. W. Joo; S. Kanatsuki; M. J. Kim; S. J. Kim; R. Kiuchi; T. Koike; Y. Komatsu; V. V. Kulikov; S. Marcello; S. Masumoto; Y. Matsumoto; K. Matsuoka; K. Miwa; T. Nagae; M. Naruki; M. Niiyama; H. Noumi; Y. Nozawa; R. Ota; K. Ozawa; N. Saito; A. Sakaguchi; H. Sako; V. Samoilov; M. Sato; S. Sato; Y. Sato; S. Sawada; M. Sekimoto; K. Shirotori; H. Sugimura; S. Suzuki; H. Takahashi; T. Takahashi; T. N. Takahashi; H. Tamura; T. Tanaka; K. Tanida; A. O. Tokiyasu; N. Tomida; Z. Tsamalaidze; M. Ukai; K. Yagi; T. O. Yamamoto; S. B. Yang; Y. Yonemoto; C. J. Yoon; K. Yoshida

doi:10.1103/PhysRevC.90.035205

High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC

M. Moritsu, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H. C. Bhang, B. Bassalleck, E. Botta, S. Bufalino, N. Chiga, H. Ekawa, P. Evtoukhovitch, A. Feliciello, H. Fujioka, S. Hayakawa, F. Hiruma, R. Honda, K. Hosomi, Y. Ichikawa, M. IeiriY. Igarashi, K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, C. W. Joo, S. Kanatsuki, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. V. Kulikov, S. Marcello, S. Masumoto, Y. Matsumoto, K. Matsuoka, K. Miwa, T. Nagae, M. Naruki, M. Niiyama, H. Noumi, Y. Nozawa, R. Ota, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, K. Shirotori, H. Sugimura, S. Suzuki, H. Takahashi, T. Takahashi, T. N. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A. O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T. O. Yamamoto, S. B. Yang, Y. Yonemoto, C. J. Yoon, K. Yoshida

School of Earth System Sciences

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Abstract

The pentaquark Θ+ has been searched for via the π-p→K-X reaction with beam momenta of 1.92 and 2.01 GeV/c at J-PARC. A missing mass resolution of 2 MeV (FWHM) was achieved but no sharp peak structure was observed. The upper limits on the production cross section averaged over the scattering angle from 2 to 15in the laboratory frame were found to be less than 0.28 μb/sr at the 90% confidence level for both the 1.92- and 2.01-GeV/c data. The systematic uncertainty of the upper limits was controlled within 10%. Constraints on the Θ+ decay width were also evaluated with a theoretical calculation using an effective Lagrangian. The present result implies that the width should be less than 0.36 and 1.9 MeV for the spin-parity of 1/2+ and 1/2-, respectively.

Original language	English
Article number	035205
Journal	Physical Review C - Nuclear Physics
Volume	90
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.90.035205
State	Published - 22 Sep 2014

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Moritsu, M., Adachi, S., Agnello, M., Ajimura, S., Aoki, K., Bhang, H. C., Bassalleck, B., Botta, E., Bufalino, S., Chiga, N., Ekawa, H., Evtoukhovitch, P., Feliciello, A., Fujioka, H., Hayakawa, S., Hiruma, F., Honda, R., Hosomi, K., Ichikawa, Y., ... Yoshida, K. (2014). High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC. Physical Review C - Nuclear Physics, 90(3), Article 035205. https://doi.org/10.1103/PhysRevC.90.035205

@article{9b16560e21934ade9581cc01111ccfbb,

title = "High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC",

abstract = "The pentaquark Θ+ has been searched for via the π-p→K-X reaction with beam momenta of 1.92 and 2.01 GeV/c at J-PARC. A missing mass resolution of 2 MeV (FWHM) was achieved but no sharp peak structure was observed. The upper limits on the production cross section averaged over the scattering angle from 2 to 15in the laboratory frame were found to be less than 0.28 μb/sr at the 90% confidence level for both the 1.92- and 2.01-GeV/c data. The systematic uncertainty of the upper limits was controlled within 10%. Constraints on the Θ+ decay width were also evaluated with a theoretical calculation using an effective Lagrangian. The present result implies that the width should be less than 0.36 and 1.9 MeV for the spin-parity of 1/2+ and 1/2-, respectively.",

author = "M. Moritsu and S. Adachi and M. Agnello and S. Ajimura and K. Aoki and Bhang, {H. C.} and B. Bassalleck and E. Botta and S. Bufalino and N. Chiga and H. Ekawa and P. Evtoukhovitch and A. Feliciello and H. Fujioka and S. Hayakawa and F. Hiruma and R. Honda and K. Hosomi and Y. Ichikawa and M. Ieiri and Y. Igarashi and K. Imai and N. Ishibashi and S. Ishimoto and K. Itahashi and R. Iwasaki and Joo, {C. W.} and S. Kanatsuki and Kim, {M. J.} and Kim, {S. J.} and R. Kiuchi and T. Koike and Y. Komatsu and Kulikov, {V. V.} and S. Marcello and S. Masumoto and Y. Matsumoto and K. Matsuoka and K. Miwa and T. Nagae and M. Naruki and M. Niiyama and H. Noumi and Y. Nozawa and R. Ota and K. Ozawa and N. Saito and A. Sakaguchi and H. Sako and V. Samoilov and M. Sato and S. Sato and Y. Sato and S. Sawada and M. Sekimoto and K. Shirotori and H. Sugimura and S. Suzuki and H. Takahashi and T. Takahashi and Takahashi, {T. N.} and H. Tamura and T. Tanaka and K. Tanida and Tokiyasu, {A. O.} and N. Tomida and Z. Tsamalaidze and M. Ukai and K. Yagi and Yamamoto, {T. O.} and Yang, {S. B.} and Y. Yonemoto and Yoon, {C. J.} and K. Yoshida",

note = "Publisher Copyright: {\textcopyright} 2014 American Physical Society.",

year = "2014",

month = sep,

day = "22",

doi = "10.1103/PhysRevC.90.035205",

language = "English",

volume = "90",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

Moritsu, M, Adachi, S, Agnello, M, Ajimura, S, Aoki, K, Bhang, HC, Bassalleck, B, Botta, E, Bufalino, S, Chiga, N, Ekawa, H, Evtoukhovitch, P, Feliciello, A, Fujioka, H, Hayakawa, S, Hiruma, F, Honda, R, Hosomi, K, Ichikawa, Y, Ieiri, M, Igarashi, Y, Imai, K, Ishibashi, N, Ishimoto, S, Itahashi, K, Iwasaki, R, Joo, CW, Kanatsuki, S, Kim, MJ, Kim, SJ, Kiuchi, R, Koike, T, Komatsu, Y, Kulikov, VV, Marcello, S, Masumoto, S, Matsumoto, Y, Matsuoka, K, Miwa, K, Nagae, T, Naruki, M, Niiyama, M, Noumi, H, Nozawa, Y, Ota, R, Ozawa, K, Saito, N, Sakaguchi, A, Sako, H, Samoilov, V, Sato, M, Sato, S, Sato, Y, Sawada, S, Sekimoto, M, Shirotori, K, Sugimura, H, Suzuki, S, Takahashi, H, Takahashi, T, Takahashi, TN, Tamura, H, Tanaka, T, Tanida, K, Tokiyasu, AO, Tomida, N, Tsamalaidze, Z, Ukai, M, Yagi, K, Yamamoto, TO, Yang, SB, Yonemoto, Y, Yoon, CJ & Yoshida, K 2014, 'High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC', Physical Review C - Nuclear Physics, vol. 90, no. 3, 035205. https://doi.org/10.1103/PhysRevC.90.035205

TY - JOUR

T1 - High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC

AU - Moritsu, M.

AU - Adachi, S.

AU - Agnello, M.

AU - Ajimura, S.

AU - Aoki, K.

AU - Bhang, H. C.

AU - Bassalleck, B.

AU - Botta, E.

AU - Bufalino, S.

AU - Chiga, N.

AU - Ekawa, H.

AU - Evtoukhovitch, P.

AU - Feliciello, A.

AU - Fujioka, H.

AU - Hayakawa, S.

AU - Hiruma, F.

AU - Honda, R.

AU - Hosomi, K.

AU - Ichikawa, Y.

AU - Ieiri, M.

AU - Igarashi, Y.

AU - Imai, K.

AU - Ishibashi, N.

AU - Ishimoto, S.

AU - Itahashi, K.

AU - Iwasaki, R.

AU - Joo, C. W.

AU - Kanatsuki, S.

AU - Kim, M. J.

AU - Kim, S. J.

AU - Kiuchi, R.

AU - Koike, T.

AU - Komatsu, Y.

AU - Kulikov, V. V.

AU - Marcello, S.

AU - Masumoto, S.

AU - Matsumoto, Y.

AU - Matsuoka, K.

AU - Miwa, K.

AU - Nagae, T.

AU - Naruki, M.

AU - Niiyama, M.

AU - Noumi, H.

AU - Nozawa, Y.

AU - Ota, R.

AU - Ozawa, K.

AU - Saito, N.

AU - Sakaguchi, A.

AU - Sako, H.

AU - Samoilov, V.

AU - Sato, M.

AU - Sato, S.

AU - Sato, Y.

AU - Sawada, S.

AU - Sekimoto, M.

AU - Shirotori, K.

AU - Sugimura, H.

AU - Suzuki, S.

AU - Takahashi, H.

AU - Takahashi, T.

AU - Takahashi, T. N.

AU - Tamura, H.

AU - Tanaka, T.

AU - Tanida, K.

AU - Tokiyasu, A. O.

AU - Tomida, N.

AU - Tsamalaidze, Z.

AU - Ukai, M.

AU - Yagi, K.

AU - Yamamoto, T. O.

AU - Yang, S. B.

AU - Yonemoto, Y.

AU - Yoon, C. J.

AU - Yoshida, K.

PY - 2014/9/22

Y1 - 2014/9/22

N2 - The pentaquark Θ+ has been searched for via the π-p→K-X reaction with beam momenta of 1.92 and 2.01 GeV/c at J-PARC. A missing mass resolution of 2 MeV (FWHM) was achieved but no sharp peak structure was observed. The upper limits on the production cross section averaged over the scattering angle from 2 to 15in the laboratory frame were found to be less than 0.28 μb/sr at the 90% confidence level for both the 1.92- and 2.01-GeV/c data. The systematic uncertainty of the upper limits was controlled within 10%. Constraints on the Θ+ decay width were also evaluated with a theoretical calculation using an effective Lagrangian. The present result implies that the width should be less than 0.36 and 1.9 MeV for the spin-parity of 1/2+ and 1/2-, respectively.

AB - The pentaquark Θ+ has been searched for via the π-p→K-X reaction with beam momenta of 1.92 and 2.01 GeV/c at J-PARC. A missing mass resolution of 2 MeV (FWHM) was achieved but no sharp peak structure was observed. The upper limits on the production cross section averaged over the scattering angle from 2 to 15in the laboratory frame were found to be less than 0.28 μb/sr at the 90% confidence level for both the 1.92- and 2.01-GeV/c data. The systematic uncertainty of the upper limits was controlled within 10%. Constraints on the Θ+ decay width were also evaluated with a theoretical calculation using an effective Lagrangian. The present result implies that the width should be less than 0.36 and 1.9 MeV for the spin-parity of 1/2+ and 1/2-, respectively.

UR - http://www.scopus.com/inward/record.url?scp=84907274779&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.90.035205

DO - 10.1103/PhysRevC.90.035205

M3 - Article

AN - SCOPUS:84907274779

SN - 0556-2813

VL - 90

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

M1 - 035205

ER -

High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC

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