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HERMES
Abstract
The earlier search at HERMES for narrow baryon states excited in quasireal photoproduction, decaying through the channel pK(S)(0) -> p pi(+)pi(-), has been extended with improved decay-particle reconstruction, more advanced particle identification, and increased event samples. The structure observed earlier at an invariant mass of 1528 MeV shifts to 1522 MeV and the statistical significance drops to about 2 sigma for data taken with a deuterium target. The number of events above background is 68(-31)(+98)(stat) +/- 13(sys). No such structure is observed in the hydrogen data set.
Keywords
BARYONS, RING, DECUPLET, SKYRME MODEL

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Citation

Please use this url to cite or link to this publication:

Chicago
Akopov, N, Z Akopov, W Augustyniak, R Avakian, A Avetissian, E Avetisyan, S Belostotski, et al. 2015. “Pentaquark Θ+ Search at HERMES.” Physical Review D 91 (5).
APA
Akopov, N., Akopov, Z., Augustyniak, W., Avakian, R., Avetissian, A., Avetisyan, E., Belostotski, S., et al. (2015). Pentaquark Θ+ search at HERMES. PHYSICAL REVIEW D, 91(5).
Vancouver
1.
Akopov N, Akopov Z, Augustyniak W, Avakian R, Avetissian A, Avetisyan E, et al. Pentaquark Θ+ search at HERMES. PHYSICAL REVIEW D. 2015;91(5).
MLA
Akopov, N, Z Akopov, W Augustyniak, et al. “Pentaquark Θ+ Search at HERMES.” PHYSICAL REVIEW D 91.5 (2015): n. pag. Print.
@article{5982223,
  abstract     = {The earlier search at HERMES for narrow baryon states excited in quasireal photoproduction, decaying through the channel pK(S)(0) -{\textrangle} p pi(+)pi(-), has been extended with improved decay-particle reconstruction, more advanced particle identification, and increased event samples. The structure observed earlier at an invariant mass of 1528 MeV shifts to 1522 MeV and the statistical significance drops to about 2 sigma for data taken with a deuterium target. The number of events above background is 68(-31)(+98)(stat) +/- 13(sys). No such structure is observed in the hydrogen data set.},
  articleno    = {057101},
  author       = {Akopov, N and Akopov, Z and Augustyniak, W and Avakian, R and Avetissian, A and Avetisyan, E and Belostotski, S and Blok, HP and Borissov, A and Bowles, J and Bryzgalov, V and Burns, J and Capitani, GP and Cisbani, E and Ciullo, G and Contalbrigo, M and Dalpiaz, PF and Deconinck, W and De Leo, R and De Sanctis, E and Di Nezza, P and Elbakian, G and Etzelm{\"u}ller, E and Fabbri, R and Fantoni, A and Felawka, L and Frullani, S and Gabbert, D and Garc{\'i}a, JG and Garibaldi, F and Gavrilov, G and Giordano, F and Gliske, S and Hartig, M and Hasch, D and Holler, Y and Hristova, I and Imazu, Y and Ivanilov, A and Jackson, HE and Joosten, S and Kaiser, R and Karyan, G and Keri, T and Kinney, E and Kisselev, A and Kozlov, V and Kravchenko, P and Krivokhijine, VG and Lagamba, L and Lapik{\'a}s, L and Lehmann, I and Lopez Ruiz, Alejandro and Lorenzon, W and Lu, X and Ma, BQ and Mahon, D and Manaenkov, SI and Mao, Y and Marianski, B and de la Ossa, AM and Marukyan, H and Miller, CA and Miyachi, Y and Movsisyan, A and Murray, M and Nappi, E and Nass, A and Negodaev, M and Nowak, WD and Pappalardo, LL and Perez-Benito, R and Petrosyan, A and Reimer, PE and Reolon, AR and Riedl, C and Rith, K and Rosner, G and Rostomyan, A and Rubin, J and Ryckbosch, Dirk and Salomatin, Y and Schnell, G and Sch{\"u}ler, KP and Seitz, B and Shibata, TA and Stancari, M and Steijger, JJM and Taroian, S and Terkulov, A and Truty, R and Trzcinski, A and Tytgat, Michael and Van Haarlem, Y and Van Hulse, C and Veretennikov, D and Vikhrov, V and Vilardi, I and Wang, S and Yaschenko, S and Ye, H and Ye, Z and Yen, S and Zihlmann, B and Zupranski, P},
  issn         = {1550-7998},
  journal      = {PHYSICAL REVIEW D},
  language     = {eng},
  number       = {5},
  pages        = {5},
  title        = {Pentaquark \ensuremath{\Theta}\unmatched{207a} search at HERMES},
  url          = {http://dx.doi.org/10.1103/PhysRevD.91.057101},
  volume       = {91},
  year         = {2015},
}

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