Measurements of the mass and width of the ηc meson and of an ηc(2S) candidate

B Aubert; Kelly Ford; Theresa Harrison; Christopher Hawkes; David Knowles; Sian Morgan; Richard Penny; Alan Watson; Nigel Watson

doi:10.1103/PhysRevLett.92.142002

Measurements of the mass and width of the ηc meson and of an ηc(2S) candidate

B Aubert, Kelly Ford, Theresa Harrison, Christopher Hawkes, David Knowles, Sian Morgan, Richard Penny, Alan Watson, Nigel Watson

Physics and Astronomy

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101 Citations (Scopus)

Abstract

The mass m(eta(c)) and total width Gamma(eta(c))(tot) of the eta(c) meson have been measured in two-photon interactions at the SLAC e(+)e(-) asymmetric B Factory with the BABAR detector. With a sample of approximately 2500 reconstructed eta(c)-->K(0)(S)K+/-pi(-/+) decays in 88 fb(-1) of data, the results are m(eta(c))=2982.5+/-1.1(stat)+/-0.9(syst) MeV/c(2) and Gamma(eta(c))(tot)=34.3+/-2.3(stat)+/-0.9(syst) MeV/c(2). Using the same decay mode, a second resonance with 112+/-24 events is observed with a mass of 3630.8+/-3.4(stat)+/-1.0(syst) MeV/c(2) and width of 17.0+/-8.3(stat)+/-2.5(syst) MeV/c(2). This observation is consistent with expectations for the eta(c)(2S) state.

Original language	English
Pages (from-to)	142002
Number of pages	1
Journal	Physical Review Letters
Volume	92
Early online date	1 Apr 2004
DOIs	https://doi.org/10.1103/PhysRevLett.92.142002
Publication status	Published - 1 Apr 2004

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10.1103/PhysRevLett.92.142002

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@article{1d230c768d25459ebeaf5b8aba6ae4ba,

title = "Measurements of the mass and width of the ηc meson and of an ηc(2S) candidate",

abstract = "The mass m(eta(c)) and total width Gamma(eta(c))(tot) of the eta(c) meson have been measured in two-photon interactions at the SLAC e(+)e(-) asymmetric B Factory with the BABAR detector. With a sample of approximately 2500 reconstructed eta(c)-->K(0)(S)K+/-pi(-/+) decays in 88 fb(-1) of data, the results are m(eta(c))=2982.5+/-1.1(stat)+/-0.9(syst) MeV/c(2) and Gamma(eta(c))(tot)=34.3+/-2.3(stat)+/-0.9(syst) MeV/c(2). Using the same decay mode, a second resonance with 112+/-24 events is observed with a mass of 3630.8+/-3.4(stat)+/-1.0(syst) MeV/c(2) and width of 17.0+/-8.3(stat)+/-2.5(syst) MeV/c(2). This observation is consistent with expectations for the eta(c)(2S) state.",

author = "B Aubert and Kelly Ford and Theresa Harrison and Christopher Hawkes and David Knowles and Sian Morgan and Richard Penny and Alan Watson and Nigel Watson",

year = "2004",

month = apr,

day = "1",

doi = "10.1103/PhysRevLett.92.142002",

language = "English",

volume = "92",

pages = "142002",

journal = "Physical Review Letters",

issn = "1079-7114",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - Measurements of the mass and width of the ηc meson and of an ηc(2S) candidate

AU - Aubert, B

AU - Ford, Kelly

AU - Harrison, Theresa

AU - Hawkes, Christopher

AU - Knowles, David

AU - Morgan, Sian

AU - Penny, Richard

AU - Watson, Alan

AU - Watson, Nigel

PY - 2004/4/1

Y1 - 2004/4/1

N2 - The mass m(eta(c)) and total width Gamma(eta(c))(tot) of the eta(c) meson have been measured in two-photon interactions at the SLAC e(+)e(-) asymmetric B Factory with the BABAR detector. With a sample of approximately 2500 reconstructed eta(c)-->K(0)(S)K+/-pi(-/+) decays in 88 fb(-1) of data, the results are m(eta(c))=2982.5+/-1.1(stat)+/-0.9(syst) MeV/c(2) and Gamma(eta(c))(tot)=34.3+/-2.3(stat)+/-0.9(syst) MeV/c(2). Using the same decay mode, a second resonance with 112+/-24 events is observed with a mass of 3630.8+/-3.4(stat)+/-1.0(syst) MeV/c(2) and width of 17.0+/-8.3(stat)+/-2.5(syst) MeV/c(2). This observation is consistent with expectations for the eta(c)(2S) state.

AB - The mass m(eta(c)) and total width Gamma(eta(c))(tot) of the eta(c) meson have been measured in two-photon interactions at the SLAC e(+)e(-) asymmetric B Factory with the BABAR detector. With a sample of approximately 2500 reconstructed eta(c)-->K(0)(S)K+/-pi(-/+) decays in 88 fb(-1) of data, the results are m(eta(c))=2982.5+/-1.1(stat)+/-0.9(syst) MeV/c(2) and Gamma(eta(c))(tot)=34.3+/-2.3(stat)+/-0.9(syst) MeV/c(2). Using the same decay mode, a second resonance with 112+/-24 events is observed with a mass of 3630.8+/-3.4(stat)+/-1.0(syst) MeV/c(2) and width of 17.0+/-8.3(stat)+/-2.5(syst) MeV/c(2). This observation is consistent with expectations for the eta(c)(2S) state.

U2 - 10.1103/PhysRevLett.92.142002

DO - 10.1103/PhysRevLett.92.142002

M3 - Article

C2 - 15089530

SN - 1079-7114

VL - 92

SP - 142002

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Measurements of the mass and width of the ηc meson and of an ηc(2S) candidate

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