Measurement Of Branching Fractions And Resonance Contributions For B0 D0bar K Pi And Search For B0 D0 K Pi Decays
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Measurement Of Branching Fractions And Resonance Contributions For B0 D0bar K Pi And Search For B0 D0 K Pi Decays
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of Branching Fractions And Resonance Contributions For B0 D0bar K Pi And Search For B0 D0 K Pi Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Using 226 million?(4S) → B{bar B} events collected with the BABAR detector at the PEp-II ee− storage ring at the Stanford Linear Accelerator Center, they measure the branching fraction for B° → {bar D}°K+?−, excluding B° → D*−K+, to be?(B° → {bar D}°K+?−) = 88 ± 15 ± 9 x 10−6. They observe B° → {bar D}°K*(892)° and B° → D*2(2460)−K+ contributions. The ratio of branching fractions?(B° → D*− K+)/?(B° → D*−?+) = (7.76 ± 0.34 ± 0.29)% is measured separately. The branching fraction for the suppressed mode B° → D°K+?− is?(B° → D°K+?−)
Measurement Of Neutral B Decay Branching Fractions To K Sub S Sup 0 Pi Sup Pi Sup Final States
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Author :
language : en
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Release Date : 2004
Measurement Of Neutral B Decay Branching Fractions To K Sub S Sup 0 Pi Sup Pi Sup Final States written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The branching fractions for B[sup 0] --> K[sup 0][pi][sup +][pi][sup -], B[sup 0] --> K*[sup +][pi][sup -] and B[sup 0] --> D[sup -]( --> K[sub s][sup 0][pi][sup -])[pi][sup +] decaying to a K[sub s][sup 0][pi][sup +][pi][sup -] state have been measured and agree with previous measurements. The direct CP violating parameter A[sub K*[pi]] was measured for the decay B[sup 0] --> K*[sup +][pi][sup -] and is in agreement with the CLEO measurement, with no evidence of CP violation with the statistics used. Using larger datasets, one can extract amplitudes and relative phases of the resonant contributions to the Dalitz plot, with the possibility to observe new B-meson decays.
Improved Measurements Of Branching Fractions For B0 Pi Pi K Pi And Search For B0 K K
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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005
Improved Measurements Of Branching Fractions For B0 Pi Pi K Pi And Search For B0 K K written by J. C. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We present preliminary measurements of branching fractions for the charmless two-body decays B{sup 0} {yields} {pi}{sup +}{pi}{sup -} and K{sup +}{pi}{sup -}, and a search for B{sup 0} {yields} K{sup +}K{sup -} using a data sample of approximately 227 million B{bar B} decays. Signal yields are extracted with a multi-dimensional maximum likelihood fit, and the efficiency is corrected for the effects of final-state radiation. We find the charge-averaged branching fractions (in units of 10{sup -6}): {Beta}(B{sup 0} {yields} {pi}{sup +}{pi}{sup -}) = 5.5 {+-} 0.4 {+-} 0.3; {Beta}(B{sup 0} {yields} K{sup +}{pi}{sup -}) = 19.2 {+-} 0.6 {+-} 0.6; and {Beta}(B{sup 0} {yields} K{sup +}K{sup -}) =
Analysis Of D0 K Pi Pi0 Decays
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Author : Michael Galante Wilson
language : en
Publisher:
Release Date : 2005
Analysis Of D0 K Pi Pi0 Decays written by Michael Galante Wilson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Analyzing D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays, herein are presented the methods and results of a search for D{sup 0}-{bar D}{sup 0} mixing, a measurement of the branching ratio R {equivalent_to} {Lambda}(D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0})/{Lambda}(D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup 0}), and measurements of the contributions from D{sup 0} {yields} K{sup +}{rho}{sup -}, K*{sup +}{pi}{sup -}, K*{sup 0}{pi}{sup 0}; 230.4 fb{sup -1} of data collected from the BABAR detector at the PEP-II collider during 2000-2004 (Runs 1-4) are analyzed. An event-level tagging technique is developed, which facilitates the accurate determination of doubly Cabibbo-suppressed resonance contributions by suppressing background from Cabibbo-favored decays. The branching ratio is measured as R = (0.214 {+-} 0.008 (stat) {+-} 0.008 (syst))%, with (46.1 {+-} 3.3 (stat) {+-} 2.9 (syst))% of D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays proceeding through the channel D{sup 0} {yields} K*{sup +}{pi}{sup -}. The data are consistent with the null-D-mixing hypothesis at a confidence level of 10%, and the expected value of {+-} {radical}(x{sup 2} + y{sup 2}) is measured as -0.013 {+-} 0.010 (stat), indicating negative interference between mixing and doubly Cabibbo-suppressed decay. The expected value of the integrated mixing rate is (x{sup 2} + y{sup 2})/2 = (0.013 {+-} 0.013 (stat))%.
Improved Measurements Of The Branching Fractions For B0 Into Pi Pi And B0 Into K Pi And A Search For B0 Into K K
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Author :
language : en
Publisher:
Release Date : 2006
Improved Measurements Of The Branching Fractions For B0 Into Pi Pi And B0 Into K Pi And A Search For B0 Into K K written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The authors present measurements of the branching fractions for the charmless two-body decays B° →??− and B° → K+?−, and a search for the decay B° → K+K−. They include the effects of final-state radiation from the daughter mesons for the first time, and quote branching fractions for the inclusive processes B° → h+h'−n?, where h and h' are pion or kaons. The maximum value of the sum of the energies of the n undetected photons, E{sub {gamma}}{sup max}, is mode-dependent. Using a data sample of approximately 227 million?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider at SLAC.
Measurement Of Branching Fraction And Dalitz Distribution For B0 To D K0 Pi Decays
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of Branching Fraction And Dalitz Distribution For B0 To D K0 Pi Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The authors present measurements of the branching fractions for the three-body decays B° → D{sup (*){-+}} K°[pi]{sup {+-}} and their resonant submodes B° → D{sup (*){-+}} K*{sup {+-}} using a sample of approximately 88 million B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric energy storage ring.
Search For Cp Violation In B0 To D K0 Decays
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Author : Troels C. Petersen
language : en
Publisher:
Release Date : 2004
Search For Cp Violation In B0 To D K0 Decays written by Troels C. Petersen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Following the idea of considering three-body decays with final state B to DKpi in the pursuit of the notoriously elusive unitary angle gamma, the initial steps towards its measurement are presented. Using a sample of approximately 88 million BBbar pairs collected with the BaBar detector at the PEP-II collider, a measurement of the branching fractions BO to D+- KO pi-+ and BO to D*+- KO pi-+ are presented for the entire Dalitz region: Br(BO to D+- KO pi-+) = (4.97 +- 0.69 +- 0.55) x 10^(-4) Br(BO to D*+- KO pi-+) = (3.00 +- 0.66 +- 0.29) x 10^(-4). In both decay modes the dominant resonance is the K*+-(892) between the neutral kaon and the charged pion. Measuring the branching fractions of the corresponding resonant two-body decays yields: Br(BO to D+- K*-+) = (4.78 +- 0.58 +- 0.53) x 10^(-4) Br(BO to D*+- K*-+) = (3.22 +- 0.59 +- 0.29) x 10^(-4). Performing a time-dependent CP asymmetries fit of the resonant decay mode BO to D+- K*-+ yields: C = 0.93 +- 0.18 +- 0.03 ABS[lambda] = 0.19 +- 0.25 +- 0.04 S = 0.18 +- 0.28 +- 0.02 Delta S = 0.08 +- 0.28 +- 0.02. As the amplitude ratio ABS[lambda] is consistant with zero, no interference sensitive to gamma can be established at this point.
Measurement Of The Branching Fraction For B D0 K
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Author :
language : en
Publisher:
Release Date : 2004
Measurement Of The Branching Fraction For B D0 K written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The authors present a measurement of the branching fraction for the decay B[sup -] [yields] D[sup 0]K*[sup -] using a sample of approximately 86 million B[bar B] pairs collected by the BABAR detector from e[sup +]e[sup -] collisions near the [Upsilon](4S) resonance. The D[sup 0] is detected through its decays to K[sup -] [pi][sup +], K[sup -][pi][sup +][pi][sup 0] and K[sup -] [pi][sup +][pi][sup -][pi][sup +], and the K*[sup -] through its decay to K[sub S][sup 0] [pi][sup -]. They measure the branching fraction to be [Beta](B[sup -] [yields] D[sup 0]K*[sup -]) = (6.3 [+-] 0.7(stat.) [+-] 0.5(syst.)) x 10[sup -4].
Study Of The B J Psi K Pi Pi Decay And Measurement Of The B X 3872 K Branching Fraction
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Author :
language : en
Publisher:
Release Date : 2004
Study Of The B J Psi K Pi Pi Decay And Measurement Of The B X 3872 K Branching Fraction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The authors study the decay B− → J/?K−??− using 117 million B{bar B} events collected at the?(4S) resonance with the BaBar detector at the PEP-II e+e− asymmetric-energy storage ring. They measure the branching fractions?(B− → J/?K−?+?−) = (116 ± 7(stat.) ± 9(syst.)) x 10−5 and?(B− → X(3872)K−) x?(X(3872) → J/??+?−) = (1.28 ± 0.41) x 10−5 and find the mass of the X(3872) to be 3873.4 ± 1.4MeV/c2. They search for the h{sub c} narrow state in the decay B− → h{sub c} K−, h{sub c} → J/??+?− and for the decay B− → J/?D°?−, with D° → K−?+. They set the 90% C.L. limits?(B− → h{sub c}K−) x?(h{sub c} → J/??+?−)
Improved Measurements Of Neutral B Decay Branching Fractions To K0s Pi Pi And The Charge Asymmetry Of B0 K Pi
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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005
Improved Measurements Of Neutral B Decay Branching Fractions To K0s Pi Pi And The Charge Asymmetry Of B0 K Pi written by J. C. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The authors analyze the decay B{sup 0} {yields} K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} using a sample of 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. A maximum likelihood fit finds the following branching fractions: {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup +}{pi}{sup -}) = (43.0 {+-} 2.3 {+-} 2.3) x 10{sup -6}, {Beta}(B{sup 0} {yields} f{sub 0}({yields} {pi}{sup +}{pi}{sup -})K{sup 0}) = (5.5 {+-} 0.7 {+-} 0.5 {+-} 0.3) x 10{sup -6} and {Beta}(B{sup 0} {yields} K*{sup +}{pi}{sup -}) = (11.0 {+-} 1.5 {+-} 0.5 {+-} 0.5) x 10{sup -6}. For these results, the first uncertainty is statistical, the second is systematic, and the third (if present) is due to the effect of interference from other resonances. They also measure the CP-violating charge asymmetry in the decay B{sup 0} {yields} K*{sup +}{pi}{sup -}, {Alpha}{sub K*{pi}} = -0.11 {+-} 0.14 {+-} 0.05.