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Search for $$X(3872)$$ and $$X(3915)$$ decay into $$chi_{c1} pi^0$$ in $$B$$ decays at Belle

Belleでの$$B$$中間子崩壊における$$chi_{c1} pi^0$$に崩壊する$$X(3872)$$および$$X(3915)$$の探索

Bhardwaj, V.*; 谷田 聖; Belle Collaboration*; 他191名*

Bhardwaj, V.*; Tanida, Kiyoshi; Belle Collaboration*; 191 of others*

We report a search for $$X(3872)$$ and $$X(3915)$$ in $$B^+ to chi_{c1} pi^0 K^+$$ decays. We set an upper limit of $$mathcal{B}(B^+ to X(3872) K^+) times mathcal{B}(X(3872) to chi_{c1} pi^0)$$ $$ < 8.1 times 10^{-6}$$ and $$mathcal{B}(B^+ to X(3915) K^+) times mathcal{B}(X(3915) to chi_{c1} pi^0)$$ $$ < 3.8 times 10^{-5}$$ at 90% confidence level. We also measure $$mathcal{B}(X(3872) to chi_{c1} pi^0)/mathcal{B}(X(3872) to J/psi pi^+ pi^-) < 0.97$$ at 90% confidence level. The results reported here are obtained from $$772 times 10^{6}$$ $$Boverline{B}$$ events collected at the $$Upsilon(4S)$$ resonance with the Belle detector at the KEKB asymmetric-energy $$e^+e^-$$ collider.

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パーセンタイル:49.94

分野:Astronomy & Astrophysics

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