@Article{BABARCollaborationLees_etal2012,
author="BABAR Collaboration (Lees, J. P. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Villanueva-Perez, P.",
title="Study of X (3915) -> J/psi omega in two-photon collisions",
journal="Physical Review D",
year="2012",
publisher="Amer Physical Soc",
volume="86",
number="7",
pages="072002--10pp",
abstract="We study the process gamma gamma -> J/psi omega using a data sample of 519.2 fb(-1) recorded by the BABAR detector at SLAC at the PEP-II asymmetric-energy e(+)e(-) collider at center-of-mass energies near the gamma(nS) (n = 2, 3, 4) resonances. We confirm the existence of the charmoniumlike resonance X (3915) decaying to J/psi omega with a significance of 7.6 standard deviations, including systematic uncertainties, and measure its mass (3919.4 +/- 2.2 +/- 1.6) MeV/c(2) and width (13 +/- 6 +/- 3) MeV, where the first uncertainty is statistical and the second systematic. A spin-parity analysis supports the assignment J(P) = 0(+) and therefore the identification of the signal as due to the chi(c0)(2P) resonance. In this hypothesis we determine the product between the two-photon width and the final state branching fraction to be (52 +/- 10 +/- 3) eV.",
optnote="WOS:000309346800004",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1168), last updated on Fri, 26 Oct 2012 11:53:40 +0000",
issn="1550-7998",
doi="10.1103/PhysRevD.86.072002",
opturl="http://arxiv.org/abs/arXiv:1207.2651",
opturl="https://doi.org/10.1103/PhysRevD.86.072002",
archivePrefix="arXiv",
eprint="arXiv:1207.2651",
language="English"
}