First study of eta(c)(1S), eta(1760) and X(1835) production via eta 'pi(+)pi(-) final states in two-photon collisions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10127370" target="_blank" >RIV/00216208:11320/12:10127370 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevD.86.052002" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.86.052002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.86.052002" target="_blank" >10.1103/PhysRevD.86.052002</a>

Result language

angličtina

Original language name

First study of eta(c)(1S), eta(1760) and X(1835) production via eta 'pi(+)pi(-) final states in two-photon collisions

Original language description

The invariant mass spectrum of the eta 'pi(+)pi(-) final state produced in two-photon collisions is obtained using a 673 fb(-1) data sample collected in the vicinity of the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a clear signal of the eta(c)(1S) and measure its mass and width to be Md(eta(c)(1S)) = (2982.7 +/- 1.8(stat) +/- 2.2(syst) +/- 0.3(model)) MeV/c(2) and Gamma(eta(c)(1S)) = (37.8(-5.3)(+5.8)(stat) +/- 2.8(syst) +/- 1.4(model)) MeV/c(2). The third error is an uncertainty due to possible interference between the eta(c)(1S) and a nonresonant component. We also report the first evidence for eta(1760) decay to eta'pi(+)pi(-); we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and eta(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Gam

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

<a href="/en/project/LA10033" target="_blank" >LA10033: Participation in the Belle a Belle II experiments: study of B-meson decays</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review D - Particles, Fields, Gravitation and Cosmology

ISSN

1550-7998

e-ISSN

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Volume of the periodical

86

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

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UT code for WoS article

000308530000001

EID of the result in the Scopus database

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