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Search for the $Z_1(4050)^+$ and $Z_2(4250)^+$ states in $\bar B^0 \to \chi_{c1} K^- \pi^+$ and $B^+ \to \chi_{c1} K^0_S \pi^+$

Abstract : We search for the $Z_1(4050)^+$ and $Z_2(4250)^+$ states, reported by the Belle Collaboration, decaying to $\chi_{c1} \pi^+$ in the decays $\bar B^0 \to \chi_{c1} K^- \pi^+$ and $B^+ \to \chi_{c1} K^0_S \pi^+$ where $\chi_{c1} \to \jpsi \gamma$. The data were collected with the BaBar detector at the SLAC PEP-II asymmetric-energy $e^+e^-$ collider operating at center-of-mass energy 10.58 GeV, and correspond to an integrated luminosity of 429 fb$^{-1}$. No evidence is found for the $Z_1(4050)^+$ and $Z_2(4250)^+$ resonances, and 90% confidence level upper limits on the branching fractions are reported for the corresponding $B$-meson decay modes.
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http://hal.in2p3.fr/in2p3-00645517
Contributor : Swarna Bassava <>
Submitted on : Monday, November 28, 2011 - 11:18:52 AM
Last modification on : Tuesday, June 30, 2020 - 10:00:38 AM

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J.P. Lees, V. Poireau, V. Tisserand, D. Bernard, M. Verderi, et al.. Search for the $Z_1(4050)^+$ and $Z_2(4250)^+$ states in $\bar B^0 \to \chi_{c1} K^- \pi^+$ and $B^+ \to \chi_{c1} K^0_S \pi^+$. Physical Review D, American Physical Society, 2012, 85, pp.052003. ⟨10.1103/PhysRevD.85.052003⟩. ⟨in2p3-00645517⟩

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