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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., 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. - 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

GASPERO, Mario;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.
2004
01 Pubblicazione su rivista::01a Articolo in rivista
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. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:(2004), pp. 242001-1-242001-5. [10.1103/physrevlett.93.242001]
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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