Measurements Of The Decays B0 D0barppbar B0 D 0ppbar B0 D Ppbar Pi And B0 D Ppbar Pi

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Measurements Of The Decays B0 D0barppbar B0 D 0ppbar B0 D Ppbar Pi And B0 D Ppbar Pi

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Measurements Of The Decays B0 D0barppbar B0 D 0ppbar B0 D Ppbar Pi And B0 D Ppbar Pi written by B. Aubert 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 branching fractions of B{sup 0} decays to multi-body final states containing protons, based on 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. They measure the branching fractions {Beta}(B{sup 0} {yields} {bar D}{sup 0} p{bar p}) = (1.13 {+-} 0.06 {+-} 0.08) x 10{sup -4} {Beta}(B{sup 0} {yields} {bar D}*{sup 0} p{bar p}) = (1.01 {+-} 0.10 {+-} 0.09) x 10{sup -4}, {Beta}(B{sup 0} {yields} D{sup -} p{bar p}{pi}{sup +}) = (3.38 {+-} 0.14 {+-} 0.29) x 10{sup -4}, and {Beta}(B{sup 0} {yields} D*{sup -} p{bar p}{pi}{sup +}) = (4.81 {+-} 0.22 {+-} 0.44) x 10{sup -4} where the first error is statistical and the second systematic. They present a search for the charmed pentaquark state, {Theta}{sub c}(3100) observed by H1 and put limits on the branching fraction {Beta}(B{sup 0} {yields} {Theta}{sub c}{bar p}{pi}{sup +}) x {Beta}({Theta}{sub c} {yields} D*{sup -}p)

Observation And Study Of Baryonic B Decays

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Author :
language : en
Publisher:
Release Date : 2009

Observation And Study Of Baryonic B 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 2009 with categories.

We present a study of ten B-meson decays to a D{sup (*)}, a proton-antiproton pair, and a system of up to two pions using BABAR's data set of 455 x 106 B{bar B} pairs. Four of the modes {bar B}° → D°p{bar p}, {bar B}° → D*°p{bar p}, {bar B}° → Dp{bar p}?−, {bar B}° → D{sup ast+}p{bar p}?− are studied with improved statistics compared to previous measurements; six of the modes (B− → D°p{bar p}?−, B− → D*°p{bar p}?−, {bar B}° → D°p{bar p}?−?+, {bar B}° → D*°p{bar p}?−?+, B− → D+p{bar p}?−?−, B− → D{sup ast+}p{bar p}?−?−) are first observations. The branching fractions for 3- and 5-body decays are suppressed compared to 4-body decays. Kinematic distributions for 3-body decays show non-overlapping threshold enhancements in m(p{bar p}) and m(D{sup (*)0}p) in the Dalitz plots. For 4-body decays, m(p?−) mass projections show a narrow peak with mass and full width of (1497.4 ± 3.0 ± 0.9)MeV/c2 and (47 ± 12 ± 4)MeV/c2, respectively, where the first (second) errors are statistical (systematic). For 5-body decays, mass projections are similar to phase space expectations. All results are preliminary.

Measurement Of The Absolute Branching Fractionsb To D Pi D Pi D Pi With Amissing Mass Method

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2006

Measurement Of The Absolute Branching Fractionsb To D Pi D Pi D Pi With Amissing Mass Method 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 2006 with categories.

We present branching fraction measurements of charged and neutral B decays to D{pi}{sup -}, D*{pi}{sup -} and D**{pi}{sup -} with a missing mass method, based on a sample of 231 million {Upsilon}(4S) {yields} B{bar B} pairs collected by the BABAR detector at the PEP-II e{sup +}e{sup -} collider. One of the B mesons is fully reconstructed and the other one decays to a reconstructed charged {pi} and a companion charmed meson identified by its recoil mass, inferred by kinematics. Here D** refers to the sum of all the non-strange charm meson states with masses in the range 2.2-2.8 GeV/c{sup 2}.

Recueil Factice D Articles De Presse Concernant Henriette Berthias

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Author :
language : en
Publisher:
Release Date :

Recueil Factice D Articles De Presse Concernant Henriette Berthias written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

An Amplitude Analysis Of The Decay B Pi Pi Pi

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

An Amplitude Analysis Of The Decay B Pi Pi 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 present a Dalitz-plot analysis of charmless B{sup {+-}} decays to the final state {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}} using 210 fb{sup -1} of data recorded by the BABAR experiment at {radical}s = 10.58 GeV. We measure the branching fractions {Beta}(B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}}) = (16.2 {+-} 1.2 {+-} 0.9) x 10{sup -6} and {Beta}(B{sup {+-}} {yields} {rho}{sup 0}(770){pi}{sup {+-}}) = (8.8 {+-} 1.0 {+-} 0.6{sub -0.7}{sup +0.1}) x 10{sup -6}. Measurements of branching fractions for the quasi-two-body decays B{sup {+-}} {yields} {rho}{sup 0}(1450){pi}{sup {+-}}, B{sup {+-}} {yields} f{sub 0}(980){pi}{sup {+-}} and B{sup {+-}} f{sub 2}(1270){pi}{sup {+-}} are also presented. They observe no charge asymmetries for the above modes, and there is no evidence for the decays B{sup {+-}} {yields} {chi}{sub c0}{pi}{sup {+-}}, B{sup {+-}} {yields} f{sub 0}(1370){pi}{sup {+-}} and B{sup {+-}} {yields} {sigma}{pi}{sup {+-}}.

A Study Of The Rare Decays B0 Ds Pi And B0 Ds K

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Author :
language : en
Publisher:
Release Date : 2003

A Study Of The Rare Decays B0 Ds Pi And B0 Ds 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 2003 with categories.

The authors report on the evidence for the decays B[sup 0][yields] D[sub s][sup+][pi][sup -] and B[sup 0][yields] D[sub s][sup -] K[sup+] and the results of a search for the decays B[sup 0][yields] D*[sub s][sup+][pi][sup -] and B[sup 0][yields] D*[sub s][sup -] K[sup+] from a sample of 84 million[Upsilon](4S) decays into B meson pairs collected with the BaBar detector at the PEP II asymmetric-energy e[sup+]e[sup -] collider. The measured B[sup 0][yields] D[sub s][sup+][pi][sup -] yield has a probability of less than 10[sup -3] to be a fluctuation of the background and they measure the branching fraction[Beta](B[sup 0][yields] D[sub s][sup+][pi][sup -])= (3.2[+-] 0.9(stat.)[+-] 1.0 (syst.)) x 10[sup -5]. The measured B[sup 0][yields] D[sub s][sup -] K[sup+] yield has a probability of less than 5 x 10[sup -4] to be a fluctuation of the background and they measure the branching fraction[Beta](B[sup 0][yields] D[sub s][sup -] K[sup+])= (3.2[+-] 1.0(stat.)[+-] 1.0(syst.)) x 10[sup -5]. They also set 90% C.L. limits[Beta](B[sup 0][yields] D*[sub s][sup+][pi][sup -])

Study Of The Decay B0bar D Omega Pi

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Study Of The Decay B0bar D Omega Pi written by B. Aubert 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.

We report on a study of the decay {bar B}{sup 0} {yields} D*{sup +}{omega}{pi}{sup -} with the BABAR detector at the PEP-II B-factory at the Stanford Linear Accelerator Center. Based on a sample of 232 million B{bar B} decays, we measure the branching fraction {Beta}({bar B}{sup 0} {yields} D*{sup +}{omega}{pi}{sup -}) = (2.88 {+-} 0.21(stat.) {+-} 0.31(syst.)) x 10{sup -3}. We study the invariant mass spectrum of the {omega}{pi}{sup -} system in this decay. This spectrum is in good agreement with expectations based on factorization and the measured spectrum in {tau}{sup -} {yields} {omega}{pi}{sup -} {nu}{sub {tau}}. We also measure the polarization of the D*{sup +} as a function of the {omega}{pi}{sup -} mass. In the mass region 1.1 to 1.9 GeV we measure the fraction of longitudinal polarization of the D*{sup +} to be {Lambda}{sub L}/{Lambda} = 0.654 {+-} 0.042(stat.) {+-} 0.016(syst.). This is in agreement with the expectations from heavy-quark effective theory and factorization assuming that the decay proceeds as {bar B}{sup 0} {yields} D*{sup +}{rho}(1450), {rho}(1450) {yields} {omega}{pi}{sup -}.

Measurement Of The Branching Fractions For The Decays B Sup 0 D Sup P Bar P Pi Sup B Sup 0 D Sup P Bar P Pi Sup B0 D Sup 0 P Bar P And B Sup 0 D Sup 0 P Bar P

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Branching Fractions For The Decays B Sup 0 D Sup P Bar P Pi Sup B Sup 0 D Sup P Bar P Pi Sup B0 D Sup 0 P Bar P And B Sup 0 D Sup 0 P Bar P 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 B[sup 0] meson decay modes B[sup 0] --> D*[sup -]p[bar p][pi][sup +], D[sup -]p[bar p][sup +], [bar D]*[sup 0]p[bar p], and B[sup 0] --> [bar D][sup 0]p[bar p] are studied in a sample of 124 x 10[sup 6] B[bar B] pairs collected with the BABAR detector at the PEP-II collider. The decay of B[sup 0] --> D[sup -]p[bar p][pi][sup +] is observed for the first time, with a measured branching fraction B(B[sup 0] --> D[sup -]p[bar p][pi][sup +]) = (3.80 [+-] 0.35 [+-] 0.46) x 10[sup -4]. The following branching fractions are also determined: B(B[sup 0] --> D*[sup -]p[bar p][pi][sup +]) = (5.61 [+-] 0.59 [+-] 0.73) x 10[sup -4], B(B[sup 0] --> [bar D]*[sup 0] p[bar p]) = (0.67 [+-] 0.21 [+-] 0.09) x 10[sup -4], and B(B[sup 0] --> [bar D][sup 0]p[bar p]) = (1.24 [+-] 0.14 [+-] 0.12) x 10[sup -4]. In each decay mode the invariant mass spectra of the charmed mesons and the baryons are compared with a pure phase-space hypothesis in order to gain insight into the B meson decay dynamics. In particular, the Dalitz plots of [bar D]*[sup 0]p versus [bar D]*[sup 0][bar p] for B[sup 0] --> [bar D]*[sup 0]p[bar p] and of [bar D][sup 0]p versus [bar D][sup 0][bar p] for B[sup 0] --> [bar D][sup 0]p[bar p] are presented. All results are preliminary.

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.

Time Dependent Dalitz Analysis Of B0 D K0 Pi Decays For The Measurement Of 2beta Gamma With The Babar Detector

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Author : Francesco Polci
language : en
Publisher:
Release Date : 2007

Time Dependent Dalitz Analysis Of B0 D K0 Pi Decays For The Measurement Of 2beta Gamma With The Babar Detector written by Francesco Polci and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

The CP violation is explained in the Standard Model with three quark generations with an irreducible phase in the Cabibbo-Kobayashi-Maskawa quark mixing matrix. The unitarity of this matrix can be represented in a complex plane as a triangle (called Unitarity Triangle). The measurement of the parameters of the triangle is a powerful test of the Standard Model description of the CP violation. This thesis tries to measure the weak phase 2beta+ gamma through the B0 -> D+ K0 Pi- decays. Respect to the two body decays B0 -> D(*)+ Pi- and B0 -> D+ Rho- presently used for the measurement of the same weak phase, the B0 -> D+ K0 Pi- decays should show up a larger CP asymmetry and does not rely on any theoretical assumption. After a review of all the methods for the measurement of 2beta+gamma, the thesis presents the results of a feasibility study of the measurement with the B0 -> D+ K0 Pi- decays . In a second part, the analysis performed on 316 fb-1 of data collected by the BaBar detector at the B-factory PEP2 is presented, from the selection of the events to the time-dependent Dalitz fit technique used in order to extract the weak phase 2beta+gamma as well as the amplitudes and phases of the intermediate resonances contributing to the decay. The result of the analysis gives the following estimation: 2beta+gamma = 89 +/- 53(stat) +23-14(syst) degrees with an irreducible ambiguity of 180 degrees.