Anti-charmed pentaquark from B decays

Abstract

We explore the possibility of observing the anti-charmed pentaquark state from the ${\Theta }_c\bar{n}{\pi }^{+}$ decay of $B$ meson produced at $B$-factory experiments. We first show that the observed branching ratio of the $B^{+}$ to ${\Lambda }_c^{-}p{\pi }^{+}$, as well as its open histograms, can be remarkably well explained by assuming that the decay proceeds first through the ${\pi }^{+}{\bar{D}}^0$ (or ${\bar{D}}^{\ast 0}$) decay, whose branching ratios are known, and then through the subsequent decay of the virtual ${\bar{D}}^0$ or ${\bar{D}}^{\ast 0}$ mesons to ${\Lambda }_c^{-}p$, whose strength are calculated using previously fit hadronic parameters. We then note that the ${\Theta }_c$ can be similarly produced when the virtual ${\bar{D}}^0$ or ${\bar{D}}^{\ast 0}$ decay into an anti-nucleon and a ${\Theta }_c$. Combining the present theoretical estimates for the ratio $g_{DN{\Lambda }_c}/g_{DN{\Theta }_c}\sim 13$ and $g_{D^{\ast }N{\Theta }_c}\sim 1/3g_{DN{\Theta }_c}$, we find that the anti-charmed pentaquark ${\Theta }_c$, which was predicted to be bound by several model calculations, can be produced via $B^{+}\to {\Theta }_c\bar{n}{\pi }^{+}$, and be observed from the $B$-factory experiments through the weak decay of ${\Theta }_c\to p{K}^{+}{\pi }^{-}{\pi }^{-}$.

4 pages, 4 figures, Revised version to be published in Physical Review Letters

References in corpus (30)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Diquarks and Exotic Spectroscopy
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• A Diquark-Triquark Model for the KN Pentaquark
• Coupled-channel study of crypto-exotic baryons with charm
• Evidence for a Narrow Anti-Charmed Baryon State
• Experimental Search for Pentaquarks
• Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon
• Five-body calculation of resonance and scattering states of pentaquark system
• Pentaquark Exotic Baryons in the Skyrme Model
• Positive parity pentaquarks in a Goldstone boson exchange model
• Heavy-Flavour Pentaquarks in a Chiral Constituent Quark Model
• Heavy Quark Symmetry and the Skyrme Model
• Pentaquark Searches at CDF
• Stable Heavy Pentaquark States
• Search for the pentaquark via the P^0_{{c bar}s} --> phi,pi,p decay
• Anti-charmed pentaquark ${\Theta }_c(3099)$ from QCD sum rules
• Bound State versus Collective Coordinate Approaches in Chiral Soliton Models and the Width of the ${\Theta }^{+}$ Pentaquark
• On the Existence of Heavy Pentaquarks: The large Nc and Heavy Quark Limits and Beyond
• Pentaquark spectrum in string dynamics
• Theta^+ baryon production in KN and NN reactions
• Dynamical study of the pentaquark antidecuplet
• Hadronic B Decays to Charmed Baryons
• QCD sum rules for the anti-charmed pentaquark
• Negative parity pentaquarks in large Nc QCD and quark model
• Charm production from proton-proton collisions
• Heavy Quark Analogues of the Theta and Their Excitations
• Pentaquarks $uudd\bar{q}$ with One Color Sextet Diquark
• Dynamics of pentaquarks in constituent quark models: recent developments

Cited by in corpus (6)

• New Charmonium States in QCD Sum Rules: a Concise Review
• QCD sum rules study of $QQ-\bar{u}\bar{d}$ mesons
• Study of exotic hadrons in S-wave scatterings induced by chiral interaction in the flavor symmetric limit
• Manifestly exotic pentaquarks with a single heavy quark
• A study of the $KN$-$K^{\ast }N$ coupled systems
• Positive parity pentaquark towers in large Nc QCD