Observation of a narrow charm-strange meson D-sJ(+)(2632)-> D-s(+)eta and (DK+)-K-0

Evdokimov, A. V.; Akgun, U.; Alkhazov, G.; Amaro Reyes, J.; Atamantchouk, A. G.; Ayan, A. S.; Balatz, M. Y.; Bondar, N. F.; Cooper, P. S.; Dauwe, L. J.; Davidenko, G. V.; Dersch, U.; Dolgolenko, A. G.; Dzyubenko, G. B.; Edelstein, R.; Emediato, L.; Endler, Amf; Engelfried, J.; Eschrich, I.; Escobar, C. O.; Filimonov, I. S.; Garcia, F. G.; Gaspero, Mario; Giller, I.; Golovtsov, V. L.; Gouffon, P.; Gulmez, E.; Kangling, H.; Jun, S. Y.; Kaya, M.; Kilmer, J.; Kim, V. T.; Kochenda, L. M.; Konorov, I.; Kozhevnikov, A. P.; Krivshich, A. G.; Kruger, H.; Kubantsev, M. A.; Kubarovsky, V. P.; Kulyavtsev, A. I.; Kuropatkin, N. P.; Kurshetsov, V. F.; Kushnirenko, A.; Kwan, S.; Lach, J.; Lamberto, A.; Landsberg, L. G.; Larin, I.; Leikin, E. M.; Yunshan, L.; Luksys, M.; Lungov, T.; Maleev, V. P.; Mao, D.; Chensheng, M.; Zhenlin, M.; Mathew, P.; Mattson, M.; Matveev, V.; Mccliment, E.; Moinester, M. A.; Molchanov, V. V.; Morelos, A.; Nelson, K. D.; Nemitkin, A. V.; Neoustroev, P. V.; Newsom, C.; Nilov, A. P.; Nurushev, S. B.; Ocherashvili, A.; Onel, Y.; Ozel, E.; Ozkorucuklu, S.; Penzo, A.; Petrenko, S. V.; Pogodin, P.; Procario, M.; Ramberg, E.; Rappazzo, G. F.; Razmyslovich, B. V.; Rud, V. I.; Russ, J.; Schiavon, P.; Simon, J.; Sitnikov, A. I.; Skow, D.; Smith, V. J.; Srivastava, M.; Steiner, V.; Stepanov, V.; Stutte, L.; Svoiski, M.; Terentyev, N. K.; Thomas, Gp; Torres, I.; Uvarov, L. N.; Vasiliev, A. N.; Vavilov, D. V.; Vazquez Jauregui, E.; Verebryusov, V. S.; Victorov, V. A.; Vishnyakov, V. E.; Vorobyov, A. A.; Vorwalter, K.; You, J.; Wenheng, Z.; Shuchen, Z.; Zukanovich Funchal, R.; Iori, Maurizio

doi:10.1103/physrevlett.93.242001

We report the first observation of a charm-strange meson D-sJ(+)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(s)(+)eta and (DK+)-K-0. In the D(s)(+)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode (DK+)-K-0. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma((DK+)-K-0)/Gamma(D(s)(+)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(s)(+)eta decay mode.

Observation of a narrow charm-strange meson D-sJ(+)(2632)-> D-s(+)eta and (DK+)-K-0 / A. V., E., U., A., G., A., J., A.R., A. G., A., A. S., A., M. Y., B., N. F., B., P. S., C., L. J., D., G. V., D., U., D., A. G., D., G. B., D., R., E., L., E., Amf, E., J., E., I., E., C. O., E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:(2004), pp. 242001-1-242001-5. [10.1103/physrevlett.93.242001]

Observation of a narrow charm-strange meson D-sJ(+)(2632)-> D-s(+)eta and (DK+)-K-0

A. V. Evdokimov;U. Akgun;G. Alkhazov;J. Amaro Reyes;A. G. Atamantchouk;A. S. Ayan;M. Y. Balatz;N. F. Bondar;P. S. Cooper;L. J. Dauwe;G. V. Davidenko;U. Dersch;A. G. Dolgolenko;G. B. Dzyubenko;R. Edelstein;L. Emediato;Amf Endler;J. Engelfried;I. Eschrich;C. O. Escobar;I. S. Filimonov;F. G. Garcia;GASPERO, Mario;I. Giller;V. L. Golovtsov;P. Gouffon;E. Gulmez;H. Kangling;S. Y. Jun;M. Kaya;J. Kilmer;V. T. Kim;L. M. Kochenda;I. Konorov;A. P. Kozhevnikov;A. G. Krivshich;H. Kruger;M. A. Kubantsev;V. P. Kubarovsky;A. I. Kulyavtsev;N. P. Kuropatkin;V. F. Kurshetsov;A. Kushnirenko;S. Kwan;J. Lach;A. Lamberto;L. G. Landsberg;I. Larin;E. M. Leikin;L. Yunshan;M. Luksys;T. Lungov;V. P. Maleev;D. Mao;M. Chensheng;M. Zhenlin;P. Mathew;M. Mattson;V. Matveev;E. Mccliment;M. A. Moinester;V. V. Molchanov;A. Morelos;K. D. Nelson;A. V. Nemitkin;P. V. Neoustroev;C. Newsom;A. P. Nilov;S. B. Nurushev;A. Ocherashvili;Y. Onel;E. Ozel;S. Ozkorucuklu;A. Penzo;S. V. Petrenko;P. Pogodin;M. Procario;E. Ramberg;G. F. Rappazzo;B. V. Razmyslovich;V. I. Rud;J. Russ;P. Schiavon;J. Simon;A. I. Sitnikov;D. Skow;V. J. Smith;M. Srivastava;V. Steiner;V. Stepanov;L. Stutte;M. Svoiski;N. K. Terentyev;Thomas Gp;I. Torres;L. N. Uvarov;A. N. Vasiliev;D. V. Vavilov;E. Vazquez Jauregui;V. S. Verebryusov;V. A. Victorov;V. E. Vishnyakov;A. A. Vorobyov;K. Vorwalter;J. You;Z. Wenheng;Z. Shuchen;R. Zukanovich Funchal;IORI, Maurizio

2004

Abstract

We report the first observation of a charm-strange meson D-sJ(+)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(s)(+)eta and (DK+)-K-0. In the D(s)(+)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode (DK+)-K-0. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma((DK+)-K-0)/Gamma(D(s)(+)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(s)(+)eta decay mode.

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				2004
			
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				01 Pubblicazione su rivista::01a Articolo in rivista
			
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				Observation of a narrow charm-strange meson D-sJ(+)(2632)-> D-s(+)eta and (DK+)-K-0 / A. V., E., U., A., G., A., J., A.R., A. G., A., A. S., A., M. Y., B., N. F., B., P. S., C., L. J., D., G. V., D., U., D., A. G., D., G. B., D., R., E., L., E., Amf, E., J., E., I., E., C. O., E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:(2004), pp. 242001-1-242001-5. [10.1103/physrevlett.93.242001]
			
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				01a Articolo in rivista

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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/20112

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