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Download or read book Measurement of the B- and Bar Bsup O Meson Lifetimes Using Semileptonic Decays written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Measurement of the B[sup+] and B[sup 0] Lifetimes from Semileptonic Decays at SLD. PDF Online Free](https://books.google.com/books/content/images/frontcover/1qnojwEACAAJ?fife=w200-h370)
Download or read book Measurement of the B[sup+] and B[sup 0] Lifetimes from Semileptonic Decays at SLD. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The lifetimes of B[sup+] and B[sup 0] mesons have been measured using a sample of 150,000 hadronic Z[sup 0] decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identifies the semileptonic decays of B mesons with high (p, p[sub t]) leptons and reconstructs the B meson decay length and charge by vertexing the lepton with a partially reconstructed D meson. This method results in a sample of 634 (584) charged (neutral) decays with high charge purity. A maximum likelihood fit finds:[tau][sub B[sup+]]= 1.60[sub[minus]0.11][sup+0.12](stat)[+-] 0.06(syst) ps, [tau][sub B[sup 0]]= 1.55[sub[minus]0.12][sup+0.13](stat)[+-] 0.09(syst) ps, and the ratio[tau][sub B[sup+]]/[tau][sub B[sup 0]]= 1.03[sub[minus]0.13][sup+0.15](stat)[+-] 0.08(syst).
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ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (893 download)
Download or read book Measurement of the B and B° Lifetimes from Semileptonic Decays at SLD. written by and published by . This book was released on 1996 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lifetimes of B and B° mesons have been measured using a sample of 150,000 hadronic Z° decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identifies the semileptonic decays of B mesons with high (p, p{sub t}) leptons and reconstructs the B meson decay length and charge by vertexing the lepton with a partially reconstructed D meson. This method results in a sample of 634 (584) charged (neutral) decays with high charge purity. A maximum likelihood fit finds: [tau]{sub B{sup +}} = 1.60{sub -0.11}{sup +0.12}(stat) ± 0.06(syst) ps, [tau]{sub B{sup 0}} = 1.55{sub -0.12}{sup +0.13}(stat) ± 0.09(syst) ps, and the ratio [tau]{sub B{sup +}}/[tau]{sub B{sup 0}} = 1.03{sub -0.13}{sup +0.15}(stat) ± 0.08(syst).
Download or read book Measurement of the Bsup + and Bsup 0 Meson Lifetimes Using Exclusive B Yields PsiK Decays at CDF. written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Bsup + and Bsup 0 Lifetimes at CDF. written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (971 download)
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.
Download or read book Bsup + and Bsup 0 Mean Lifetime Measurements written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Measurement of the B[sup+] and B[sup 0] Lifetimes Using Topological Vertexing at SLD. PDF Online Free](https://books.google.com/books/content/images/frontcover/KAaODAEACAAJ?fife=w200-h370)
Download or read book Measurement of the B[sup+] and B[sup 0] Lifetimes Using Topological Vertexing at SLD. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The lifetimes of B[sup+] and B[sup 0] mesons have been measured using the entire sample of 550,000 hadronic Z[sup 0] decays collected by the SLD experiment at the SLC between 1993 and 1998. In this paper, we describe the inclusive analysis of the 350,000 hadronic Z[sup 0] decays collected in 1997-98 with the upgraded SLD vertex detector. In this data period, a high statistics sample of 30903 (20731) charged (neutral) vertices with good charge purity is obtained. The charge purity is enhanced by using the vertex mass, the SLC electron beam polarization (73% for 1997-8) and an opposite hemisphere jet charge technique. Combining the results of this data sample with the results from the earlier data yield the following preliminary values:[tau][sub B[sup+]]= 1.623[+-] 0.020(stat)[+-] 0.034(syst) ps, [tau][sub B[sup+]]= 1.565[+-] 0.021(stat)[+-] 0.043(syst) ps, [tau][sub B[sup+]]=[tau][sub B[sup 0]]= 1.037[+-][sub 0.024][sup 0.025](stat)[+-] 0.024(syst).
![Download Measurement of the B[sup+] and B[sup 0] Lifetimes at CDF. PDF Online Free](https://books.google.com/books/content/images/frontcover/7wjYjwEACAAJ?fife=w200-h370)
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.
![Download Preliminary Measurement of Time-dependent B[sub D][sup 0]-B[sub D][sup 0] Mixing Using Topology and Charge Selected Semi-leptonic B Decays PDF Online Free](https://books.google.com/books/content/images/frontcover/q0_2jwEACAAJ?fife=w200-h370)
Download or read book Preliminary Measurement of Time-dependent B[sub D][sup 0]-B[sub D][sup 0] Mixing Using Topology and Charge Selected Semi-leptonic B Decays written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B[sub d][sup 0]-B[sub d][sup 0] mixing has been measured using a sample of 150,000 hadronic Z[sup 0] decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identifies the semileptonic decays of B mesons with high (p, p[sub t]) leptons and reconstructs the B meson decay length and charge by vertexing the lepton with a partially reconstructed D meson. Vertex charge is used to enrich the selection of neutral over charged B mesons. This method results in a sample of 581 neutral decays with high charge purity. The B candidate is tagged at production with a combined tag that exploits the large polarized b forward-backward asymmetry in conjunction with the opposite hemisphere b jet charge. The final state is tagged by the sign of the high (p, p[sub t]) lepton. From their preliminary analysis the authors find a mass difference between the two B[sub d][sup 0] mass eigenstates of, [Delta]m[sub d]= 0.452[+-] 0.074(stat)[+-] 0.049(syst) ps[sup[minus]1].
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ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (683 download)
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.
![Download Lifetime Difference in the Bs0 System from Untagged Bs0 ---] J/psi Phi Decay at S**(1/2) PDF Online Free](https://books.google.com/books/content/images/frontcover/82LujwEACAAJ?fife=w200-h370)
Author : Avdhesh Chandra
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ISBN 13 :
Total Pages : 167 pages
Book Rating : 4.:/5 (316 download)
Download or read book Lifetime Difference in the Bs0 System from Untagged Bs0 ---] J/psi Phi Decay at S**(1/2) written by Avdhesh Chandra and published by . This book was released on 2006 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, they present a study of the untagged decay of B{sub s}{sup 0} {yields} J/{psi}{phi}, the final state of which is a superposition of the CP-even and CP-odd states. Within the framework of the standard model (SM), to a good approximation, the two CP eigenstates of the (B{sub s}{sup 0}, {bar B}{sub s}{sup 0}) system are equivalent to mass eigenstates. The data collected by the D0 detector between June 2002 to August 2004 (an integrated luminosity of approximately 450 pb{sup -1}) has been used for the analysis presented in this thesis. From a simultaneous fit to the B{sub s}{sup 0} candidate mass, lifetime, and the angular distribution of the decay products, they obtain the CP-odd fraction in the final state at production time to be 0.16 {+-} 0.10(stat) {+-} 0.02(syst). The average lifetime of the (B{sub s}{sup 0}, {bar B}{sub s}{sup 0}) system is measured to be 1.39{sub -0.16}{sup +0.13}(stat){sub -0.02}{sup +0.01}(syst) ps, with the relative width difference between the heavy and light mass eigenstates, {Delta}{Gamma}/{bar {Gamma}} = ({Gamma}{sup L}/{Gamma}{sup H})/{bar {Gamma}} = 0.24{sub -0.38}{sup +0.28}(stat){sub -0.04}{sup +0.03}(syst). With the additional constraint from the world average of the B{sub s}{sup 0} lifetime measurements using semileptonic decays, they find average lifetime of the (B{sub s}, {sup 0}, {bar B}{sub s}{sup 0}) system 1.39 {+-} 0.06 ps with {Delta}{Gamma}/{bar {Gamma}} = 0.25{sub -0.15}{sup +0.14}. They have also done B{sup 0} lifetime measurement for its analogous decay mode to J/{psi}K*. With this measurement they get B{sup 0} lifetime 1.530 {+-} 0.043(stat) {+-} 0.023(syst) ps. Using above results, they get 0.91 {+-} 0.09(stat) {+-} 0.003(syst), for the ratio of the B{sub s}{sup 0} and B{sup 0} lifetimes ({bar {Gamma}}(B{sub s}{sup 0})/{Gamma}(B{sup 0})). These measurements are consistent with the predictions of SM within the measurement uncertainty.
Download or read book Bsup O - Bar Bsup O Mixing, Lifetimes and Rare Decays at CDF and written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1516 pages
Book Rating : 4.:/5 (319 download)
Download or read book INIS Atomindex written by and published by . This book was released on 1985 with total page 1516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
