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Observation Of Exclusive B Meson Decays To Final States Containing A Charmed Baryon
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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 Exclusive B Decays to Final States Containing a Charmed Baryon by :
Download or read book Observation of Exclusive B Decays to Final States Containing a Charmed Baryon written by and published by . This book was released on 2003 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data collected in the region of the?(4S) resonance with the CLEO-II detector, they report on the first observation of exclusive decays of the B meson to final states with a charmed baryon. They have measured the branching fractions?(B− →?{sub c}{bar p}?−) = (0.62{sub -0.20}{sup +0.23} ± 0.11 ± 0.10) x 10−3 and?({bar B}° →?{sub c}+{bar p}?+?−) = (1.33{sub -0.42}{sup +0.46} ± 0.31 ± 0.21) x 10−3. In addition, they report upper limits for final states of the form {bar B} →?{sub c}+{bar p}(n?) and?{sub c}+{bar p}(n?)?° where (n?) denotes up to four charged pions.
Book Synopsis Study of B-Meson Decays to Final States with a Single Charm Baryon by :
Download or read book Study of B-Meson Decays to Final States with a Single Charm Baryon written by and published by . This book was released on 2007 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of B-meson decays to final states with a single charm baryon is presented based on data recorded by the BABAR detector at the Stanford Linear Accelerator Center. Although the B meson is the lightest bottom-flavored meson, it is heavy enough to decay to a baryon made of three quarks and an antibaryon made of three antiquarks. By studying the baryonic weak decays of the B meson, we can investigate baryon production mechanisms in heavy meson decays. In particular, we measure the rates of the decays B- → [Lambda]+c$\bar{p}$[pi]- and $\bar{B}$0 → [Lambda]+c$\bar{p}$. Comparing these rates, we confirm an observed trend in baryonic B decays that the decay with the lower energy release, B- → [Lambda]+c$\bar{p}$[pi]-, is favored over $\bar{B}$0 → [Lambda]+c$\bar{p}$. The dynamics of the baryon-antibaryon ([Lambda]+c$\bar{p}$) system in the three-body decay also provide insight into baryon-antibaryon production mechanisms. The B- → [Lambda]+c$\bar{p}$[pi]- system is a laboratory for searches for excited #c baryon states; we observe the resonant decays B- → [Sigma]c(2455) 0$\bar{p}$ and B- → [Sigma]c(2800) 0$\bar{p}$. This is the first observation of the decay B- → [Sigma]c(2800) 0$\bar{p}$; however, the mass of the observed #c(2800)0 state is inconsistent with previous measurements. Finally, we examine the angular distribution of the B- → [Sigma]c(2455) 0$\bar{p}$ decays and measure the spin of the B- → [Sigma]c(2455) 0$\bar{p}$ baryon to be J = 1/2, as predicted by the quark model.
Book Synopsis Study of B-meson Decays to Final States with a Single Charm Baryon by : Stephanie A. Majewski
Download or read book Study of B-meson Decays to Final States with a Single Charm Baryon written by Stephanie A. Majewski and published by . This book was released on 2007 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis First Observation of Fully Reconstructed B0 and Bs0 Decays into Final States Involving an Excited Neutral Charm Meson in LHCb by : Arnau Brossa Gonzalo
Download or read book First Observation of Fully Reconstructed B0 and Bs0 Decays into Final States Involving an Excited Neutral Charm Meson in LHCb written by Arnau Brossa Gonzalo and published by Springer Nature. This book was released on 2023-01-31 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest results on the branching fraction and phase space distribution of B0 and Bs0 decays into final states including excited neutral charm mesons. This work represents four years of research, and the book describes in detail all the necessary steps and techniques required to perform a physics analysis of the data recorded by the LHCb experiment in the years 2016–2018. Although the results presented in this book represent the first measurement of such decays, the text is written in a manner accessible to Ph.D. students and early career researchers. Thus, all the contents included in this book are described in a pedagogical way, including technical details that would allow the results to be reproduced in future. In addition to the methodology used to perform these measurements, the book also includes a description of the theoretical background required to interpret the results presented, as well as a technical description of the LHCb detector, which provided the data sample used in this study.
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 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 Observation and Study of the Baryonic B-meson Decays B to D(*) P Pbar?? by :
Download or read book Observation and Study of the Baryonic B-meson Decays B to D(*) P Pbar?? written by and published by . This book was released on 2012 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results for B-meson decay modes involving a charm meson, protons, and pions using 455 x 106 B{bar B} pairs recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy ee− collider. The branching fractions are measured for the following ten decays: {bar B}° → D°p{bar p}, {bar B}° → D*°p{bar p}, {bar B}° → D+p{bar p}?−, {bar B}° → D*+p{bar p}?−, B− → D°p{bar p}?−, B− → D*°pp?−, {bar B}° → D°p{bar p}?−?+, {bar B}° → D*°p{bar p}?−?+, B− → D+p{bar p}?−?−, and B− → D*+p{bar p}?−?−. The four B− and the two five-body B° modes are observed for the first time. The four-body modes are enhanced compared to the three- and the five-body modes. In the three-body modes, the M(p{bar p}) and M(D{sup (*)0}p) invariant mass distributions show enhancements near threshold values. In the four-body mode {bar B}° → D+p{bar p}?−, the M(p?−) distribution shows a narrow structure of unknown origin near 1.5GeV/c2. The distributions for the five-body modes, in contrast to the others, are similar to the expectations from uniform phase-space predictions.
Book Synopsis Exclusive B Decays Into Final States with Two Charmed Baryons by : Xuedong Chai
Download or read book Exclusive B Decays Into Final States with Two Charmed Baryons written by Xuedong Chai and published by . This book was released on 2007 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observation of inclusive B-meson decays into A_1hn+_1tnc baryons by :
Download or read book Observation of inclusive B-meson decays into A_1hn+_1tnc baryons written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Heavy-flavored Particles . Albany High Energy Group by :
Download or read book Study of Heavy-flavored Particles . Albany High Energy Group written by and published by . This book was released on 1993 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The program of physics analysis using CLEO II data is reported. A statistically significant measurement was made of the isospin mass splitting of the [Sigma][sub c][sup +] with respect to the [Sigma][sub c][sup o] and [Sigma][sub c][sup ++]. This result is based on first observation of the [Sigma][sub c][sup +] in the decay mode [Lambda][sub c][sup +][pi][sup 0]. Many new decay modes of the charmed baryon [Lambda][sub c][sup +] were studied. Several new decay modes of [xi][sub c]'s. Some preliminary results on 3 new modes of [Omega][sub c][sup 0] decay are reported. In the area of B-meson decay into baryons, were observed conclusively the decays B [yields] [Sigma][sub c][sup 0] and [Sigma][sub c][sup ++]. From about 1500 events corresponding to B [yields] [Lambda][sub c][sup +]X reconstruction of exclusive final states of the form [Lambda][sub c][sup +](n[pi]) was started. A comprehensive investigation of particle identification using both the time-of-flight and dE/dx systems was made. Measurement of pion, kaon and proton identification efficiencies have been made, corresponding to several different selection criteria. Measurements of corresponding pion probabilities to fake kaons nd protons have also been made.
Book Synopsis Observation And Study of B Meson Decays with Lambda(C) Baryons with the BaBar Detector by :
Download or read book Observation And Study of B Meson Decays with Lambda(C) Baryons with the BaBar Detector written by and published by . This book was released on 2013 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cbt Workshop written by F. Caruso and published by Atlantica Séguier Frontières. This book was released on 1995 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exclusive B Decays Into Final States with Two Charmed Baryons by :
Download or read book Exclusive B Decays Into Final States with Two Charmed Baryons written by and published by . This book was released on 2007 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Thesis presents measurements of the decays B- → ?0c$ar{Λ}$-c, $ar{B0}$ → ?+c$ar{Λ}$-c, B- → ?+c$ar{Λ}$-cK-, and $ar{B0}$ → ?+c$ar{Λ}$-c-K0s based on 228 million (4S) → B$ar{B}$ decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. The branching fraction of B- → ?+c$ar{Λ}$-cK- is measured to be (1.22 ± 0.16 ± 0.14 ± 0.63) x 10-3, and the branching fraction of B0→?+c$ar{Λ}$c-$ar{K0}$ is (0.40 ± 0.33 ± 0.05 ± 0.21) x 10-3. The product B(B- → ?0c$ar{Λ}$-c) x B( ?0c→ ?-?+) is measured to be (2.04± 0.59 ± 0.26 ± 0.53) x 10-5, and B($ar{B0}$→ ?+c$ar{Λ}$-c) x B (?+c → ?-?+?+) is (1.50 ± 1.07 ± 0.19 ± 0.39) x 10-5, where the uncertainties are statistical, systematic, and the uncertainty from the branching fraction B(?+c → p+ K-?+), respectively.
Book Synopsis Heavy Flavours and High-Energy Collisions in the 1–100 TeV Range by : A. Ali
Download or read book Heavy Flavours and High-Energy Collisions in the 1–100 TeV Range written by A. Ali and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume is based on the proceedings of the 6th and 7th INFN ELOISATRON project workshops, held at the Centro di Cultura Scientifica "Et tore Majorana" CCSEM, Erice-Trapani, Sicily, Italy, in the period June 10-27, 1988. The topics of the two workshops were, respectively: - Heavy Flavours: Status and Perspectives, and - Novel Features of High Energy Collisions in 1-100 TeV Region. They were attended by sixty-three physicists. The two workshops were followed by a meeting of the INFN ELOISATRON working group, also held at the CCSEM in the period October 7-15, 1988 in which twenty-five physicists participated. Since there was quite a bit of overlap among speakers, participants and the topics covered at the three meetings, we have decided to issue ajoint proceeding, with the first part entitled: Heavy Flavour Physics, and the second: High Energy Physics with 1-100 Te V Proton Beams. Some of the reports included in this volume have been contributed by the INFN ELOISATRON working group members. The first. part of these proceedings deals mostly with the presentation and inter pretation of results in t.he so-called fiavour physics sector. New results, which have become available in the last three years from experiments involving kaons, charmed and beauty hadrons, and searches for the still missing top quark at the present and fothcoming colliders are topics of major interest. here. The contributions in this part are organized in three categories: Experimental Results, Theoretical Interpretation, and Future Directions.
Book Synopsis Observation of Inclusive B Meson Decays Into [lambda]+c̳ Baryons by : ARGUS Collaboration
Download or read book Observation of Inclusive B Meson Decays Into [lambda]+c̳ Baryons written by ARGUS Collaboration and published by . This book was released on 1988 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis OBSERVATION OF EXCLUSIVE TWO-BODY B DECAYS TO KAONS AND PIONS. by :
Download or read book OBSERVATION OF EXCLUSIVE TWO-BODY B DECAYS TO KAONS AND PIONS. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied two-body charmless hadronic decays of B mesons into the final states[pi][pi], K[pi], and KK. Using 3.3 million B[bar B] pairs collected with the CLEO-II detector, we have made the first observation of the decays B[sup 0][yields] K[sup+][pi][sup -], B[sup+][yields] K[sup 0][pi][sup+], and the sum of B[sup+][yields][pi][sup+][pi][sup 0] and B[sup+][yields] K[sup+][pi][sup 0] decays (an average over charge-conjugate states is always implied). We place upper limits on branching fractions for the remaining decay modes.
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