S. Kumar

activity

20012014

most citedThe Physics of the B Factories

427 citations · 1.1k across the 13 of their papers we have counts for

collaborators

13 papers

hep-ex2014★ 427 cited

The Physics of the B Factories

A. J. Bevan, B. Golob, Th. Mannel +2003

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and da…

hep-ex2005★ 165 cited

Improved Measurement of the Electroweak Penguin Process B->Xsll

The Belle Collaboration, M. Iwasaki

We present an improved measurement of the branching fraction for the electroweak penguin process B->Xsll, where l is an electron or a muon and Xs is a hadronic system containing an…

hep-ex2004★ 16 cited

Search for $B^{0} \to p p ˉ$ , $Λ Λ ˉ$ and $B^{+} \to p Λ ˉ$ at Belle

M. -C. Chang

We report results of a search for the charmless two-body baryonic decays B^0 \to p \bar{p}, B^0 \to Λ\barΛ, and B^+\to p \barΛ based on the analysis of a 140 fb^{-1} data sample. W…

hep-ex2004★ 21 cited

Evidence for $B^{+} \to ω l^{+} ν$

The Belle Collaboration

We have searched for the decay $B^{+} \to ω l^{+} ν$ ( $l = e$ or $μ$ ) in 78 fb $^{- 1}$ of $Υ (4 S)$ data (85 million $B B ˉ$ events) accumulated with the Belle detector. The final state is fu…

hep-ex2003★ 52 cited

Measurement of branching fraction ratios and CP asymmetries in $B^{\pm} \to D_{C P} K^{\pm}$

S. K. Swain, T. E. Browder

We report results on the decay $B^{-} \to D_{C P} K^{-}$ and its charge conjugate using a data sample of 85.4 million $B B ˉ$ pairs recorded at the $Υ (4 S)$ resonance with the Bell…

hep-ex2003★ 11 cited

Improved Measurement of the Partial-Rate CP Asymmetry in B+ -> K0pi+ and B- -> K0bar pi- Decays

Y. Unno, K. Suzuki

We report an improved measurement of the partial-rate CP asymmetry in B+ => K0pi+ and B- => K0bar pi- decays. The analysis is based on a data sample of 85 million BBbar pairs colle…

hep-ex2003★ 46 cited

Evidence for CP-Violating Asymmetries in B0->pi+pi- Decays and Constraints on the CKM Angle phi2

Belle Collaboration, K. Abe

We present an improved measurement of CP-violating asymmetries in B0 -> pi+ pi- decays based on a 78 fb^-1 data sample collected at the Y(4S) resonance with the Belle detector at t…

hep-ex2002★ 20 cited

Precise Measurement of B Meson Lifetimes with Hadronic Decay Final States

Belle collaboration, K. Abe

The lifetimes of the B0bar and B- mesons are extracted from 29.1/fb of data collected with the Belle detector at the KEK B-factory. A fit to the decay length differences of neutral…

hep-ex2002★ 14 cited

Observation of chi_c2 Production in B-meson Decay

Belle Collaboration

We report the first observation of chi_c2 production in B-meson decays. We find an inclusive B -> chi_c2 X branching fraction of (1.80^{+0.23}_{-0.28}+/- 0.26) 10^-3. The data set,…

hep-ex2001★ 88 cited

Observation of the Decay $B \to K ℓ^{+} ℓ^{-}$

K. Abe

We report a search for the flavor-changing neutral current decay $B \to K^{(*)} ℓ^{+} ℓ^{-}$ using a 29.1 fb $^{- 1}$ data sample accumulated at the $Υ (4 S)$ resonance with th…

hep-ex2001★ 47 cited

Observation of Color-suppressed $B ˉ^{0} \to D^{0} π^{0}$ , $D^{* 0} π^{0}$ , $D^{0} η$ , and $D^{0} ω$ Decays

K. Abe, The Belle Collaboration

We report the first observation of color-suppressed $B ˉ^{0} \to D^{0} π^{0}$ , $D^{* 0} π^{0}$ , $D^{0} η$ , and $D^{0} ω$ decays and evidence for $B ˉ^{0} \to D^{* 0} η$ and $D^{*0}ω…

hep-ex2001★ 29 cited

Observation of Cabibbo suppressed $B \to D^{(*)} K^{-}$ decays at Belle

K. Abe

Cabibbo-suppressed decays $B \to D^{(*)} K^{-}$ using a 10.4 fb $^{- 1}$ data sample accumulated at the $Υ (4 S)$ resonance with the Belle detector at the KEKB $e^{+} e^{-}$ storage ring. Th…

hep-ex2001★ 118 cited

Measurement of the CP Violation Parameter sin(2phi_1) in B^0_d Meson Decays

A. Abashian

We present a measurement of the Standard Model CP violation parameter sin(2phi_1) based on a 10.5 fb^{-1} data sample collected at the Upsilon(4S) resonance with the Belle detector…