Observation of the DsJ(2317) and DsJ(2457) in B decays

TL;DR

This paper reports the first observation of specific B meson decays involving DsJ(2317) and DsJ(2457) states, including their decay modes, based on a large dataset collected with the Belle detector.

Contribution

First observation of B --> Dbar DsJ(2317) and B --> Dbar DsJ(2457) decays, detailing their decay channels and setting upper limits on other modes.

Findings

Observation of DsJ(2317) decaying to Ds pi0

Observation of DsJ(2457) decaying to Ds* pi0 and Ds gamma

Set 90% CL upper limits for other decay modes

Abstract

We report the first observation of the B --> Dbar DsJ(2317) and B --> Dbar DsJ(2457) decays based on 123.8 10^6 BBar events collected with the Belle detector at KEKB. We observe the DsJ(2317) decay to Ds pi0 and DsJ(2457) decay to the Ds* pi0 and Ds gamma final states. We also set 90% CL upper limits for the decays DsJ(2317) --> Ds* gamma, DsJ(2457) --> Ds* gamma, DsJ(2457) --> Ds pi0 and DsJ(2457) --> Ds pi+ pi-.