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Study of X(3915)→J/ψω in two-photon collisions
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BaBar Collaboration (Including:
). (2012) Study of X(3915)→J/ψω in two-photon collisions. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.86 (No.7). Article no. 072002. doi:10.1103/PhysRevD.86.072002 ISSN 1550-7998.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.86.072002
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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | October 2012 | ||||
| Dates: |
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| Volume: | Vol.86 | ||||
| Number: | No.7 | ||||
| Page Range: | Article no. 072002 | ||||
| DOI: | 10.1103/PhysRevD.86.072002 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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