Study of B meson decays to hadronic final states without a charm quarkprobes the dynamics of both weak and strong interactions, and thereforeplays a key role in understanding the charge-parity (CP) violation andlow meson spectroscopy. In this talk, I shall discuss recent results oncharmless hadronic B decays, studied using data collected with the BABARdetector at the PEP-II asymmetric-energy e+e- collider at the StanfordLinear Accelerator Center. Future prospects for this exciting branch offlavour physics at the proposed Super B Factory will also be discussed.

We extend Tooru-Cohen analysis for nonequilirium steady state(NSS) of aBrownian particle to nonequilibrium oscillatory state (NOS) of Brownianparticle by considering time dependent externaldrive protocol. We consider an unbounded charged Brownian particle in thepresence of oscillatingelectric field and prove work fluctuation theorem, which is valid for anyinitial distribution and at alltimes. For harmonically bounded and constantly dragged Brownian particleconsidered by Tooru andCohen, work fluctuation theorem is valid for any initial condition(alsoNSS), but only in large timelimit. We use Onsager-Machlup Lagrangian with a constraint to obtainfrequency dependent workdistribution function, and describe entropy production rate and propertiesof dissipation functionsfor the present system using Onsager-Machlup functional.