Role of the hadron molecule Λc (2940) in the p p ¯ →pD0 Λ ¯ c (2286) annihilation reaction

Yubing Dong, Amand Faessler, Thomas Gutsche, Valery E. Lyubovitskij

Research School of High-Energy Physics

Research output: Contribution to journal › Article

Abstract

The annihilation process pp¯→pD0Λ¯c(2286) is studied taking into account t-channel D0, D∗0 meson exchange and the resonance contribution of Λc(2286) and Λc(2940) baryons. We assume that the Λc(2940) baryon is a pD∗0 molecular state with spin-parity 12+ and 12-. Our results show that near the threshold of pp¯→Λc(2286)Λ¯c(2286) the contribution from the intermediate state Λc(2940) is also sizeable and can be observed at the P¯ANDA experiment. Another conclusion is that the spin-parity assignment 12- for Λc(2940) gives enhancement for the cross section in comparison with a choice 12+.

Original language	English
Article number	094001
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	90
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.90.094001
Publication status	Published - 3 Nov 2014

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ASJC Scopus subject areas

Nuclear and High Energy Physics

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Dong, Y., Faessler, A., Gutsche, T., & Lyubovitskij, V. E. (2014). Role of the hadron molecule Λc (2940) in the p p ¯ →pD0 Λ ¯ c (2286) annihilation reaction. Physical Review D - Particles, Fields, Gravitation and Cosmology, 90(9), [094001]. https://doi.org/10.1103/PhysRevD.90.094001

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abstract = "The annihilation process pp¯→pD0Λ¯c(2286) is studied taking into account t-channel D0, D∗0 meson exchange and the resonance contribution of Λc(2286) and Λc(2940) baryons. We assume that the Λc(2940) baryon is a pD∗0 molecular state with spin-parity 12+ and 12-. Our results show that near the threshold of pp¯→Λc(2286)Λ¯c(2286) the contribution from the intermediate state Λc(2940) is also sizeable and can be observed at the P¯ANDA experiment. Another conclusion is that the spin-parity assignment 12- for Λc(2940) gives enhancement for the cross section in comparison with a choice 12+.",

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AU - Dong, Yubing

AU - Faessler, Amand

AU - Gutsche, Thomas

AU - Lyubovitskij, Valery E.

PY - 2014/11/3

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N2 - The annihilation process pp¯→pD0Λ¯c(2286) is studied taking into account t-channel D0, D∗0 meson exchange and the resonance contribution of Λc(2286) and Λc(2940) baryons. We assume that the Λc(2940) baryon is a pD∗0 molecular state with spin-parity 12+ and 12-. Our results show that near the threshold of pp¯→Λc(2286)Λ¯c(2286) the contribution from the intermediate state Λc(2940) is also sizeable and can be observed at the P¯ANDA experiment. Another conclusion is that the spin-parity assignment 12- for Λc(2940) gives enhancement for the cross section in comparison with a choice 12+.

AB - The annihilation process pp¯→pD0Λ¯c(2286) is studied taking into account t-channel D0, D∗0 meson exchange and the resonance contribution of Λc(2286) and Λc(2940) baryons. We assume that the Λc(2940) baryon is a pD∗0 molecular state with spin-parity 12+ and 12-. Our results show that near the threshold of pp¯→Λc(2286)Λ¯c(2286) the contribution from the intermediate state Λc(2940) is also sizeable and can be observed at the P¯ANDA experiment. Another conclusion is that the spin-parity assignment 12- for Λc(2940) gives enhancement for the cross section in comparison with a choice 12+.

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10.1103/PhysRevD.90.094001