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Measurement Of The B And B Meson Lifetimes Using Exclusive B 2psik Decays At Cdf
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Book Synopsis Measurement of the B and B° Meson Lifetimes Using Exclusive B 2![psi]K Decays at CDF. by :
Download or read book Measurement of the B and B° Meson Lifetimes Using Exclusive B 2![psi]K Decays at CDF. written by and published by . This book was released on 1995 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present recent CDF measurements of [tau], [tau]°, and [tau]/[tau]° using exclusive B 2![psi]K decays, where B = B+ or B°, [psi] = J/[psi] or [psi](2S), and K = K+, K*(892)°, K{sub S}°, or K*(892)+. The precision of these results is less than 10% and is nearly identical to that previously reported at LEP.
Book Synopsis Measurement of Neutral B Meson and Charged B Meson Lifetimes Using Semileptonic Decays at CDF by : David K. Clark
Download or read book Measurement of Neutral B Meson and Charged B Meson Lifetimes Using Semileptonic Decays at CDF written by David K. Clark and published by . This book was released on 2010 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the B− and {bar B}° Meson Lifetimes Using Semileptonic Decays by :
Download or read book Measurement of the B− and {bar B}° Meson Lifetimes Using Semileptonic Decays written by and published by . This book was released on 1995 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lifetimes of the B− and {bar B}° mesons are measured using the partially reconstructed semileptonic decays in the CDF experiment.
Book Synopsis Measurement of the B and B° Lifetimes at CDF by :
Download or read book Measurement of the B and B° Lifetimes at CDF written by and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two measurements of the lifetime of neutral and charged B mesons in p{bar p} collisions at √s = 1.8 TeV by the CDF experiment are presented. The first relies on the study of exclusive decays of the type B → [psi] K, the second on semileptonic decays of a B meson into a D° or a D. The combined results are [tau](B+) = 1.62 ± 0.09 ps, [tau](B0) = 1.60 ± 0.09 ps and [tau](B+)/[tau](B°) = 1.00 ± 0.07.
Book Synopsis Measurement of the B[sup+] and B[sup 0] Meson Lifetimes Using Exclusive B[yields][psi]K Decays at CDF. by :
Download or read book Measurement of the B[sup+] and B[sup 0] Meson Lifetimes Using Exclusive B[yields][psi]K Decays at CDF. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present recent CDF measurements of[tau][sup+], [tau][sup 0], and[tau][sup+]/[tau][sup 0] using exclusive B[yields][psi]K decays, where B= B[sup+] or B[sup 0], [psi]= J/[psi] or[psi](2S), and K= K[sup+], K*(892)[sup 0], K[sub S][sup 0], or K*(892)[sup+]. The precision of these results is less than 10% and is nearly identical to that previously reported at LEP.
Book Synopsis A Measurement of the Charged and Neutral B Meson Lifetimes Using Fully Reconstructed Decays by :
Download or read book A Measurement of the Charged and Neutral B Meson Lifetimes Using Fully Reconstructed Decays written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Data collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC are used to study the lifetimes of the B° and B mesons. The data sample consists of 7.4 fb−1 collected near the Upsilon(4S) resonance. B° and B mesons are fully reconstructed in several exclusive hadronic decay modes to charm and charmonium final states. The B lifetimes are determined from the flight length difference between the two B mesons which are pair-produced in the Upsilon(4S) decay. The preliminary measurements of the lifetimes are tau{sub B0} = 1.506 " 0.052 (stat) " 0.029 (syst) ps, tau{sub B+} = 1.602 " 0.049 (stat) " 0.035 (syst) ps, and of their ratio is tau{sub B+}/tau{sub B0} = 1.065 " 0.044 (stat) " 0.021 (syst).
Book Synopsis Measurement of the B/s0 Lifetime in B/s0 --] K+ K- Decays by :
Download or read book Measurement of the B/s0 Lifetime in B/s0 --] K+ K- Decays written by and published by . This book was released on 2009 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is presented to simultaneously separate the contributions to a sample of B{sub (s)}° 2!hh{sup {prime}-} decays, where h = [pi] or K, and measure the B meson lifetimes in the sample while correcting for the bias in the lifetime distributions due to the hadronic trigger at the CDF experiment. Using 1 fb−1 of data collected at CDF the B° lifetime is measured as [tau]{sub B°} = 1.558{sub -0.047}{sup +0.050}{sub stat} ± 0.028{sub syst} ps, in agreement with the world average measurement. The B{sub s}° lifetime in the B{sub s}° 2!KK− decay is measured as [tau]{sub B{sub s}° 2!K+K−} = 1.51{sub -0.11}{sup +0.13}{sub stat} ± 0.04{sub syst} ps. No difference is observed between the lifetime and other measurements of the average B{sub s}° lifetime or the lifetime of the light B{sub s}° mass eigenstate determined from B{sub s}° 2!J/[psi][phi] decays. With the assumptions that B{sub s}° 2!K+K− is 100% CP-even and that [tau]{sub B{sub s}°} = [tau]{sub B°} the width difference in the B{sub s}{sup 0} system is determined as [Delta][Lambda]{sup CP}/[Lambda] = 0.03{sub -0.15}{sup +0.17}{sub stat} ± 0.05{sub syst} using the current world average B{sup 0} lifetime. This is consistent with zero and with the current world average measurement.
Book Synopsis A Measurement of the Neutral B Meson Lifetime Using Partially Reconstructed B0 -] D*-pi+ Decays by :
Download or read book A Measurement of the Neutral B Meson Lifetime Using Partially Reconstructed B0 -] D*-pi+ Decays written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The neutral B meson lifetime has been measured with the data collected by the BABAR detector at the PEP-II storage ring during the year 2000 for a total integrated luminosity of 20.3 fb[sup -1]. The B[sup 0][yields] D*[sup -][pi][sup+] decays have been selected with a partial reconstruction method in which only the fast pion from the B[sup 0] decay and the slow pion from D*[sup -][yields][bar D][sup 0][pi][sup -] are reconstructed. The B[sup 0] lifetime has been measured to be 1.510[+-] 0.040[+-] 0.038 ps with a sample of 6971[+-] 241 reconstructed signal events.
Book Synopsis Measurement of B0 and B+ Lifetimes Using Semileptonic Decays at CDF. by :
Download or read book Measurement of B0 and B+ Lifetimes Using Semileptonic Decays at CDF. written by and published by . This book was released on 2010 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lifetime measurements for B0 and B+ are presented using semileptonic decays of B mesons from 360 pb-1 of data collected by CDF's lepton plus displaced track trigger. The decays B 2!l[nu]DX, where D is either D +, D0, or D* +, are partially reconstructed from a muon or electron, a displaced track, and a fully reconstructed charm meson. The B 0 and B+ lifetimes are obtained from an unbinned maximum-likelihood fit to the proper decay length distributions. The measured lifetimes are [tau]B 0 = 1.527 ± 0.012(stat.) ± 0.023(syst.)ps and [tau]B + = 1.629 ± 0.013(stat.) ± 0.025(syst.)ps.
Book Synopsis Measurement of the B[sup+] and B[sup 0] Lifetimes at CDF. by :
Download or read book Measurement of the B[sup+] and B[sup 0] Lifetimes at CDF. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two measurements of the lifetime of neutral and charged B mesons in p[bar p] collisions at[radical]s= 1.8 TeV by the CDF experiment are presented. The first relies on the study of exclusive decays of the type B[yields][psi] K, the second on semileptonic decays of a B meson into a D[degrees] or a D. The combined results are[tau](B[sup+])= 1.62[+-] 0.09 ps, [tau](B[sub 0])= 1.60[+-] 0.09 ps and[tau](B[sup+])/[tau](B[sup 0])= 1.00[+-] 0.07.
Book Synopsis Measurement of the $B_c^{\pm}$ Meson Lifetime Using $B_c^{\pm} \to J/\psi~\pi^{\pm}$ Decays by :
Download or read book Measurement of the $B_c^{\pm}$ Meson Lifetime Using $B_c^{\pm} \to J/\psi~\pi^{\pm}$ Decays written by and published by . This book was released on 2013 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a measurement of the lifetime of the B± c meson in an exclusive decay channel B± c 2!J/ [psi] [pi]±, where the J/[psi] decays as J/[psi] 2![mu]+[mu]- The measurement uses a data sample with an integrated luminosity of 6.7 fb-1 collected at CDF. This is the first measurement of the B± c meson lifetime in a hadronic channel and the measured lifetime, [tau] = 0.449 +0.054 -0.048(stat:) ± 0.019(syst:) ps, is in good agreement with previous results obtained from semileptonic decay channel and confirms previous measurements and theoretical predictions.
Book Synopsis Measurement of the Lifetimes of B Meson Mass Eigenstates by : Konstantin Anikeev
Download or read book Measurement of the Lifetimes of B Meson Mass Eigenstates written by Konstantin Anikeev and published by . This book was released on 2005 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we present the results of the average lifetime measurements in ... ..., and ... decays, as well as the results of a time-dependent angular analysis of ... and ... decays. The time-dependent angular analysis of ... allows the extraction of separate lifetimes for the mass eigenstates ... and ..., in the ... system. The two lifetimes are combined to extract the width difference ..., between the two eigenstates. This quantity is extremely useful for over-constraining the Unitarity Triangle and thereby inferring if CP violation in the quark sector is entirely explained within the Standard Model. From ... of data collected by CDF up to February 13, 2004, we obtain a wealth of results, most importantly: ... Several of the results obtained here are currently the best of their kind, and in some cases they are unique measurements. We devote special attention to these, in particular ...
Download or read book CDF Results on B Decays written by and published by . This book was released on 1995 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present recent CDF results on B lifetimes, B meson mass measurements, ratios of branching ratios, and rare decays. In addition, they present the first measurement of time-dependent B{sub d} mixing at CDF. Several results have been updated and a few new ones included since the workshop.
Book Synopsis Measurement of the B[sub S] Meson Lifetime at CDF. by :
Download or read book Measurement of the B[sub S] Meson Lifetime at CDF. written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton-antiproton collision data corresponding to a total integrated luminosity of [approximately] 21 pb[sup [minus]1] were collected with the CDF detector at the Fermilab Tevatron collider during 1992--1993. The lifetime of the B[sub s] meson is measured using events from the semileptonic decay B[sub s] [yields] [ell][sup +][nu]D[sub s][sup [minus]]X and from the exclusive decay B[sub s] [yields] J/[psi][phi]. For the semileptonic decay channel, 76 [ell][sup +]D[sub s][sup [minus]] signal events are selected where the D[sub s] is identified via the decay D[sub s][sup [minus]] [yields] [phi][pi][sup [minus]], [phi] [yields] K[sup +]K[sup [minus]]. From this sample the B[sub s] meson lifetime is determined to be [tau][sub s] = 1.42[sub [minus]0.23][sup +0.27] (stat.)[sub [minus]0.11][sup +0.11] (syst.) ps. In the J/[psi][phi] channel, 11 events are used and the lifetime is found to be [tau][sub s] = 1.74[sub [minus]0.60][sup +0.90] (stat.)[sub [minus]0.07][sup +0.07] (syst.) ps.
Book Synopsis Measurement of the B Cross Section at CDF Via B Semileptonic Decays by :
Download or read book Measurement of the B Cross Section at CDF Via B Semileptonic Decays written by and published by . This book was released on 1994 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data collected during the 1992--1993 collider run at Fermilab, CDF has reconstructed several hundred charmed mesons (D°, D D*+ and D{sub s}) in association with leptons from B semileptonic decays. We report on a measurement of the cross section of B and B{sub s} mesons as a function of transverse momentum using this sample. The observation of a charmed meson eliminates many systematic uncertainties in the background subtraction inherent in previous measurements from inclusive lepton samples, and allows the backgrounds to be measured from the data. The B meson p{sub T} range probed by the lepton + charm technique is 18 GeV and above, and thus these measurements complement similar measurements at lower p{sub T} in the fully exclusive channels B 2!J/[psi]K and B 2!J/[psi]K*. Results are compared to other Tevatron measurements and Next-To-Leading-Order QCD predictions.
Book Synopsis Search for New Physics Using Radiative B Meson Decays and Lifetime Measurment of the B Meson with the Belle II Experiment by : Reem Rasheed
Download or read book Search for New Physics Using Radiative B Meson Decays and Lifetime Measurment of the B Meson with the Belle II Experiment written by Reem Rasheed and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: After the Big Bang matter and antimatter were present in equal amounts. Today, however, everything we see, is made almost entirely of matter. A fundamental ingredient to explain this asymmetry between matter and antimatter is the violation of the CP (Charge Parity) symmetry. CP violation has been observed but quantitatively not enough to explain the huge asymmetry. The Belle II experiment in Japan studies the particles produced in electron-positron collisions at the SuperKEKB collider, the highest intensity collider in the World, allowing a high precision measurements of the known sources of CP violation and looking for new ones. In my PhD, I worked on measuring the CP violation in B meson radiative decays (decays with photon in final state) particularly promising thanks to their high sensitivity to possible new processes. Following this analysis, I started a new measurement of the B mesons lifetime where I could verify the robustness of the tools used in the CP violation measurement.
Book Synopsis Measurement of the B±c Meson Lifetime Using B±c2!J/[Psi] + L± + X Decays by :
Download or read book Measurement of the B±c Meson Lifetime Using B±c2!J/[Psi] + L± + X Decays written by and published by . This book was released on 2008 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a measurement of the average proper decay time of the B±c mesons, the ground state of bottom and charm quark bound states. The lifetime measurement is carried out in the decay modes B±c → J/[Psi] + e± + X and B±c → J/[Psi] + [mu]± + X, where the J/[Psi] decays as J/[Psi] → [mu]+[mu]- and the X are unmeasured particles such as ve or v[mu]. The data are collect by the CDF II detector which measures the properties of particles created in √s = 1.96 TeV p$\bar{p}$ collisions delivered by the Fermilab Tevatron. This measurement uses ~ 1 fb-1 of integrated luminosity. The measured average proper decay time of B±c mesons, [tau] = 0.475-0.049+0.053(stat.) ± 0.018(syst.) ps, is competitive with the most precise measurements in the world and confirms previous measurements and theoretical predictions.
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