Search for inclusive charmless B->K+X and B->K0X decays

TL;DR

This paper reports a search for inclusive charmless B->KX decays via b->s penguin transitions, measuring partial branching fractions using data from the BABAR detector, providing insights into these rare processes.

Contribution

First measurement of partial branching fractions for high-energy kaons in inclusive charmless B->KX decays using BABAR data.

Findings

Measured B(B->K+X, p*>2.34GeV) = 196^{+37}_{-34}(stat.)^{+31}_{-30}(syst.)

Measured B(B->K0X, p*>2.34GeV) = 154^{+55}_{-48}(stat.)^{+55}_{-41}(syst.)

Upper limit of <266 at 90% C.L. for K0X decays

Abstract

We present preliminary results from a search for inclusive charmless B->KX decays. These decays occur dominantly via one-loop b->s penguin transitions, and can provide useful information about these processes. Using a sample of 288.5/fb collected with the BABAR detector at the PEP-II asymmetric-energy e+e- B Factory at SLAC, we search for high-energy kaons recoiling against fully reconstructed B decays. We measure the partial branching fractions for kaons with momentum p*(K)>2.34GeV in the B rest frame, and obtain (in units of 10^-6): B(B->K+X, p*>2.34GeV) = 196^{+37}_{-34}(stat.)^{+31}_{-30}(syst.) and B(B->K0X, p*>2.34GeV) = 154^{+55}_{-48}(stat.)^{+55}_{-41}(syst.) (<266 at 90% C.L.).