论文信息 - Photoproduction of exotic baryon resonances

Photoproduction of exotic baryon resonances

Abstract We point out that the new exotic resonances recently reported by LHCb in the J / ψ p channel are excellent candidates for photoproduction off a proton target. This test is crucial to confirming the resonant nature of such states, as opposed to their being kinematical effects. We specialize to an interpretation of the heavier narrow state as a molecule composed of Σ c and D ¯ ⁎ , and estimate its production cross section using vector dominance. The relevant photon energies and fluxes are well within the capabilities of the GlueX and CLAS12 detectors at Thomas Jefferson National Accelerator Facility (JLAB). A corresponding calculation is also performed for photoproduction of an analogous resonance which is predicted to exist in the ϒp channel.

Marek Karliner | M. Karliner | J. Rosner | Jonathan L. Rosner

[1] A. Silverman,et al. Photoproduction of the psi (3100) meson at 11 GeV , 1975 .

[2] Qian Wang,et al. Photoproduction of hidden charm pentaquark states P-c(+)(4380) and P-c(+)(4450) , 2015, 1508.00339.

[3] The H1 Collaboration,et al. Inelastic photoproduction of $J/\psi$ mesons at HERA , 1996, hep-ex/9603005.

[4] M. Voloshin,et al. Formation of hidden-charm pentaquarks in photon-nucleon collisions. , 2015, 1508.00888.

[5] W. R. Frisken,et al. Measurement of elastic ? photoproduction at HERA , 1996 .

[6] W. W. Ash,et al. Photoproduction of the psi Particles , 1975 .

[7] D. Glazier. A quasi-real photon tagger for CLAS12 , 2010 .

[8] Alan D. Martin,et al. Review of Particle Physics , 2014, 1412.1408.

[9] M. Karliner,et al. New Exotic Meson and Baryon Resonances from Doubly Heavy Hadronic Molecules. , 2015, Physical review letters.

[10] M. Kelsey,et al. Observation of $J/\psi p$ Resonances Consistent with Pentaquark States in $\Lambda_b^0 \to J/\psi K^- p$ Decays , 2015, 1507.03414.

[11] S. Chekanov,et al. Exclusive photoproduction of ? mesons at HERA , 2009 .