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Observation Of B To B 1 K0 And Search For B Meson Decays To B 10k0 And B 1pi0
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Book Synopsis Observation of B+ to B_1+K0 and Search for B-meson Decays to B_10K0 and B_1pi0 by :
Download or read book Observation of B+ to B_1+K0 and Search for B-meson Decays to B_10K0 and B_1pi0 written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of searches for decays of B mesons to final states with a b1 meson and a neutral pion or kaon. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 465 million B{bar B} pairs produced in ee− annihilation. The results for the branching fractions are, in units of 10−6, [Beta](B 2!b1+K°) = 9.6 ± 1.7 ± 0.9, [Beta](B° 2!b1°K°) = 5.1 ± 1.8 ± 0.5 (
Book Synopsis Observation of B Meson Decays to OmegaK* and Improved Measurements for Omegarho and Omegaf0 by :
Download or read book Observation of B Meson Decays to OmegaK* and Improved Measurements for Omegarho and Omegaf0 written by and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of B meson decays to the final states [omega]K*, [omega][rho], and [omega]f0, where K* indicates a spin 0, 1, or 2 strange meson. The data sample corresponds to 465 x 106 B{bar B} pairs collected with the BABAR detector at the PEP-II ee− collider at SLAC. B meson decays involving vector-scalar, vector-vector, and vector-tensor final states are analyzed; the latter two shed new light on the polarization of these final states. We measure the branching fractions for nine of these decays; five are observed for the first time. For most decays we also measure the charge asymmetry and, where relevant, the longitudinal polarization f{sub L}.
Book Synopsis Study of B Meson Decays to Ppbarh Final States by : Tetiana B. Hryn'ova
Download or read book Study of B Meson Decays to Ppbarh Final States written by Tetiana B. Hryn'ova and published by . This book was released on 2006 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: B mesons are unique among well-established non-quarkonium mesons in their ability to decay into baryons. Baryonic B decays offer a wide range of interesting areas of study: they can be used to test our theoretical understanding of rare decay processes involving baryons, search for direct CP violation and study low-energy QCD. This thesis presents measurements of branching fractions and a study of the decay dynamics of the charmless three-body decays of B meson into p{bar p}h final states, where h = {pi}{sup +}, K{sup +}, K{sub S}{sup 0}, K*{sup 0} or K*{sup +}. With a sample of 232 million {Upsilon}(4S) {yields} B{bar B} events collected with the BaBar detector, we report the first observation of the B {yields} p{bar p}K*{sup 0} decay, and provide improved measurements of branching fractions of the other modes. The distribution of the three final-state particles is of particular interest since it provides dynamical information on the possible presence of exotic intermediate states such as the hypothetical pentaquark states {Theta}*{sup ++} and {Theta}{sup +}in the m{sub pK{sup +}} and m{sub pK{sub S}{sup 0}} spectra, respectively, or glueball states (such as the tensor glueball f{sub J}(2220)) in the m{sub p{bar p}} spectrum. No evidence for exotic states is found and upper limits on the branching fractions are set. An enhancement at low p{bar p} mass is observed in all the B {yields} p{bar p}h modes, and its shape is compared between the decay modes and with the shape of the time-like proton form factor. A Dalitz plot asymmetry in B {yields} p{bar p}K{sup +} mode suggests dominance of the penguin amplitude in this decay and disfavors the possibility that the low mass p{bar p} enhancement originates from the presence of a resonance below threshold (such as the recently seen baryonium candidate at 1835 MeV/c{sup 2}). We also identify decays of the type B {yields} X{sub c{bar c}}h {yields} p{bar p}h, where h = K{sup +}, K{sub S}{sup 0}, K*{sup 0} or K*{sup +}, and X{sub c{bar c}} = {eta}{sub c} or J/{psi}. In particular, we report on the evidence of the B {yields} {eta}{sub c}K*{sup +} decay and provide a measurement of the width of {eta}{sub c}.
Book Synopsis Observation of B Meson Decays to Omegapi+, OmegaK+, and OmegaK0 by :
Download or read book Observation of B Meson Decays to Omegapi+, OmegaK+, and OmegaK0 written by and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary measurements of B meson decays to B 2![omega][pi], B+ 2![omega]K+, and B° 2![omega]K°. The data were recorded with the BABAR detector and correspond to 88.9 x 106 B{bar B} pairs produced in e+e− annihilation at the [Upsilon](4S) resonance. They find statistically significant signals for all three channels: [Beta](B+ 2![omega][pi]+) = (5.4 ± 1.0 ± 0.5) x 10−6, [Beta](B+ 2![omega]K+) = (5.0 ± 1.0 ± 0.4) x 10−6, and [Beta](B° 2![omega]K°) = (5.3{sub -1.2}{sup +1.4} ± 0.5) x 10−6. They also measure time-integrated charge asymmetries [Alpha]{sub ch}(B+ 2![omega][pi]+) = 0.04 ± 0.17 ± 0.01 and [Alpha]{sub ch}(B+ 2![omega]K+) = -0.05 ± 0.16 ± 0.01.
Book Synopsis Search for B-meson Decays to B1rho and B1K___ by :
Download or read book Search for B-meson Decays to B1rho and B1K___ written by and published by . This book was released on 2010 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for decays of B mesons to final states with a b1 meson and a [rho] or K*(892) meson. The search is based on a data sample consisting of 465 million B{bar B} pairs collected by the BABAR detector at the SLAC National Accelerator Laboratory. We do not observe any statistically significant signal. The upper limits we set on the branching fractions range from 1.4 to 8.0 x 10−6 at the 90% confidence level (C.L.), including systematic uncertainties.
Book Synopsis The Search for Rare Non-hadronic B-meson Decays with Final-state Neutrinos Using the BaBar Detector by : Dana Lindemann
Download or read book The Search for Rare Non-hadronic B-meson Decays with Final-state Neutrinos Using the BaBar Detector written by Dana Lindemann and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents the searches for two rare B meson decays: the radiative leptonic decay B+ -> l+ nu gamma (l = e, mu) and the flavor-changing neutral current B -> K(*) nu nubar. These searches use the full dataset collected by the BaBar experiment, which corresponds to almost 500 million BB pairs. After fully reconstructing the hadronic decay of one of the B mesons in Upsilon(4S) -> BB decays, evidence of B+ -> l+ nu gamma or B -> K(*) nu nubar is looked for in the rest of the event. No significant evidence of either signal decay is observed. Model-independent branching-fraction upper limits are set at BR(B ->e nu gamma)17 x10 {-6}, BR(B -mu nu gamma)24 x10 {-6}, and BR(B -l nu gamma)15.6 x10 {-6}, all at the 90% confidence level. These are currently the most stringent published upper limits for B+ - l+ nu gamma. In addition, branching-fraction upper limits are set at BR(B -> K+ nu nubar)3.7 x10 {-5}, BR(B - K0 nu nubar)8.0 x10 {-5}, BR(B - K*+ nu nubar)11.5 x10 {-5}, and BR(B - K*0 nu nubar)9.2 x10 {-5}, all at the 90% confidence level. For additional sensitivity to New Physics contributions, partial B - K(*) nu nubar branching-fraction upper limits are also determined over the full kinematic range." --
Download or read book B Decays written by Sheldon Stone and published by World Scientific. This book was released on 1992 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of b quarks has now reached a stage where it is useful to review what has been learned so far and also to look at the implications of future studies. The most important observations thus far measurement of the B lifetime, B0 B0 mixing, and the observation of b? u transitions, as well as more mundane results on hadronic and semileptonic transitions are described in detail by experimentalists who have been closely involved with the measurements. Theoretical progress in understanding b quark decays, including the mechanisms of hadronic and semileptonic decays, are described. Synthesizing the experimental and theoretical information, the authors discuss tests of the standard model and measurements of standard model parameters. Possibilities of more extensive tests using measurement of CP violation in the B system are also addressed.
Book Synopsis B Decays (Revised 2nd Edition) by : Sheldon Stone
Download or read book B Decays (Revised 2nd Edition) written by Sheldon Stone and published by World Scientific. This book was released on 1994-08-01 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2nd edition is an extensive update of 'B Decays”. The revisions are necessary because of the extensive amount of new data and new theoretical ideas. This book reviews what is known about b-quark decays and also looks at what can be learned in the future.The importance of this research area is increasing, as evidenced by the approval of the luminosity upgrade for CESR and the asymmetric B factories at SLAC and KEK, and the possibility of experiments at hadron colliders.The key experimental observations made thus far, measurement of the lifetimes of the different B species, B0-B0 mixing, the discovery of “Penguin” mediated decays, and the extraction of the CKM matrix elements Vub and Vcb from semileptonic decays, as well as more mundane results, are described in great detail by the experimentalists who have been closely involved with making the measurements. Theoretical progress in understanding b-quark decays using HQET and lattice gauge techniques are described by theorists who have developed and used these techniques.Synthesizing the experimental and theoretical information, several articles discuss the implications for the “Standard Model” and how further tests can be done using measurements of CP violation in the B system.
Book Synopsis A Search for Charmless Baryonic B Meson Decays at CLEO by : Eric Ashton Eckhart
Download or read book A Search for Charmless Baryonic B Meson Decays at CLEO written by Eric Ashton Eckhart and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We search for the decays of $B$ mesons to charmless final states involving a baryon and an anti-baryon using 9.2 fb -1 of e + e - annihilation data taken on the?(4s) resonance with the CLEO II and CLEO II. V detectors, and 6.2 fb -1 from CLEO III. We perform an extended maximum likelihood analysis of the data to determine signal yields. We report an observation of the decay mode B - -> p anti-p K - and measure its branching fraction to be (5.88 +2.86 -2.21 (stat.) +1.12 -0.19 (syst.)) x 10 -6 . We find no statistically significant signals for our other modes and establish 90% C.L. upper limits of BR(B -> p anti-p) 1.4 x 10 -6, BR(B - anti-p?) 1.5 x 10 -6, BR(B -? anti-?) 1.2 x 10 -6, and BR(B - anti-p?p +)
Book Synopsis Two-body B Meson Decays by : Heather S. Krieg
Download or read book Two-body B Meson Decays written by Heather S. Krieg and published by . This book was released on 1999 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis B Meson Decays to Mega K*, Omega Rho, Omega Omega, Omega Phi, and Omega F0 by : J. C. Chen
Download or read book B Meson Decays to Mega K*, Omega Rho, Omega Omega, Omega Phi, and Omega F0 written by J. C. Chen and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors describe searches for B meson decays to the charmless vector-vector final states {omega}K*, {omega}p, {omega}{omega}, and {omega}{phi} with 233 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation at {radical}s = 10.58 GeV. They also search for the vector-scalar B decay to {omega}f{sub 0}.
Book Synopsis Observation of B Meson Decays to Eta Pi and Eta K. by :
Download or read book Observation of B Meson Decays to Eta Pi and Eta K. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary measurements of the B meson decays B[sup+][yields][eta][pi][sup+], B[sup+][yields][eta]K[sup+], and B[sup 0][yields][eta]K[sup 0]. The data were recorded with the BABAR detector at PEP II and correspond to 88.9 x 10[sup 6] B[bar B] pairs produced in e[sup+]e[sup -] annihilation through the[Upsilon](4S) resonance. They find the branching fractions[Beta](B[sup+][yields][eta][pi][sup+])= (4.2[sub -0.9][sup+1.0][+-] 0.3) x 10[sup -6] and[Beta](B[sup+][yields][eta]K[sup+])= (2.8[sub -0.7][sup+0.8][+-] 0.2) x 10[sup -6]. They set a 90% CL upper limit of[Beta](B[sup 0][yields][eta]K[sup 0])
Book Synopsis Study of Rare B Meson Decays Related to the CKM Angle Beta at BaBar by :
Download or read book Study of Rare B Meson Decays Related to the CKM Angle Beta at BaBar written by and published by . This book was released on 2007 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for B Meson Decays to Eta' Eta' K. by : B. Aubert
Download or read book Search for B Meson Decays to Eta' Eta' K. written by B. Aubert and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors describe searches for decays of B mesons to the charmless final states {eta}'{eta}'K. The data consist of 228 million B{bar B} pairs produced in e{sup +}e{sup -} annihilation, collected with the BABAR detector at the Stanford Linear Accelerator Center. The 90% confidence level upper limits for the branching fractions are {Beta}(B{sup 0} {yields} {eta}'{eta}'K{sup 0})
Book Synopsis On Decays of B Mesons to a Strange Meson and an Eta Or Eta' Meson at Babar by :
Download or read book On Decays of B Mesons to a Strange Meson and an Eta Or Eta' Meson at Babar written by and published by . This book was released on 2009 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe studies of the decays of B mesons to final states [eta]K{sup *}(892), [eta]K{sup *}0(S-wave), [eta]K{sup *}2(1430), and [eta]'K based on data collected with the BABAR detector at the PEP-II asymmetric-energy ee− collier at the Stanford Linear Accelerator Center. We measure branching fractions and charge asymmetries for the decays B 2![eta]K{sup *}, where K{sup *} indicates a spin 0, 1, or 2 K[pi] system, making first observations of decays to final states [eta]K{sup *0}0(S-wave), [eta]K{sup *+}0 (S-wave), and [eta]K{sup *0}2(1430). We measure the time-dependent CP-violation parameters S and C for the decays B° 2![eta]'K°, observing CP violation in a charmless B decay with 5[sigma] significance considering both statistical and systematic uncertainties.
Book Synopsis Observation of Exclusive B Meson Decays to Final States Containing a Charmed Baryon by : John Joseph O'Neill (Ph. D. in physics)
Download or read book Observation of Exclusive B Meson Decays to Final States Containing a Charmed Baryon written by John Joseph O'Neill (Ph. D. in physics) and published by . This book was released on 1996 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observation of the Decay B -] Jpsi Eta K and Search for the X(3872) -] Jpsi Eta by :
Download or read book Observation of the Decay B -] Jpsi Eta K and Search for the X(3872) -] Jpsi Eta written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report the observation of the B meson decay B[sup [+-]] [yields] J/[psi][eta]K[sup [+-]] and evidence for the decay B[sup 0] [yields] J/[psi][eta]K[sub S][sup 0], using 90 million B[bar B] events collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II e[sup +]e[sup -] asymmetric-energy storage ring. They obtain branching fractions of [Beta](B[sup [+-]] [yields] J/[psi][eta]K[sup [+-]]) = (10.8 [+-] 2.3(stat.) [+-] 2.4(syst.)) x 10[sup -5] and [Beta](B[sup 0] [yields] J/[psi][eta]K[sub S][sup 0]) = (8.4 [+-] 2.6(stat.) [+-] 2.7(syst.)) x 10[sup -5]. They search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B[sup [+-]] [yields] X(3872)K[sup [+-]], X(3872) [yields] J/[psi][eta] and determine an upper limit of [Beta](B[sup [+-]] [yields] X(3872)K[sup [+-]]) [yields] (J/[psi][eta]K[sup [+-]])
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