Evidence for an [Formula omitted] resonance in [Formula omitted] decays

A Dalitz plot analysis of [Formula omitted] decays is performed using data samples of pp collisions collected with the [Formula omitted] detector at centre-of-mass energies of [Formula omitted] and [Formula omitted], corresponding to a total integrated luminosity of [Formula omitted]. A satisfactory...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2018-12, Vol.78 (12), p.1-23
Main Authors: Aaij, R, Beteta, C. Abellán, Adeva, B, Adinolfi, M, Aidala, C. A, Ajaltouni, Z, Akar, S
Format: Article
Language:English
Subjects:
Luminosity
Statistical analysis
Statistical methods
Online Access:Get full text
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Summary:A Dalitz plot analysis of [Formula omitted] decays is performed using data samples of pp collisions collected with the [Formula omitted] detector at centre-of-mass energies of [Formula omitted] and [Formula omitted], corresponding to a total integrated luminosity of [Formula omitted]. A satisfactory description of the data is obtained when including a contribution representing an exotic [Formula omitted] resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are [Formula omitted] and [Formula omitted], respectively. The spin-parity assignments [Formula omitted] and [Formula omitted] are both consistent with the data. In addition, the first measurement of the [Formula omitted] branching fraction is performed and gives B(B0[right arrow][eta]c(1S)K+[pi]-)=(5.73±0.24±0.13±0.66)x10-4,where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-018-6447-z