Study Of Orbitally Excited Bs Mesons And Evidence For A New B Resonance With The Cdf Ii Detector PDF Download
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Author | : Manuel Kambeitz |
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Total Pages | : |
Release | : 2014 |
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Download Study of Orbitally Excited B(s) Mesons and Evidence for a New B Π Resonance with the CDF II Detector Book in PDF, ePub and Kindle
Author | : Manuel Kambeitz |
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Total Pages | : |
Release | : 2014 |
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Download Study of Orbitally Excited B(s) Mesons and Evidence for a New B Pi Resonance with the CDF II Detector Book in PDF, ePub and Kindle
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Total Pages | : 127 |
Release | : 2014 |
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Download Study of Orbitally Excited $B_{(s)}$ Mesons and Evidence for a New $B\pi$ Resonance with the CDF II Detector Book in PDF, ePub and Kindle
This thesis presents an analysis of excited states of B0, B+ and B0 s mesons, decaying to B mesons while emitting a pion or kaon. They are reconstructed from their decay products and a selection is performed to discard wrongly reconstructed B(s) mesons with the multivariate analysis software NeuroBayes, as described in chapter 5. In the training process, the sPlot method and measured and simulated data are used. Chapter 6 describes how the properties of excited B(s) are determined by an unbinned maximum likelihood t to their mass spectra. The systematic uncertainties determined in this analysis are described in chapter 7. The results of this thesis are presented in chapter 8 and a conclusion is given in chapter 9. The results shown in this thesis have been published before in [1].
Author | : Andreas Gessler |
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Release | : 2009 |
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Download Search for Orbitally Excited B Mesons with the CDF II Detector Book in PDF, ePub and Kindle
Author | : Jennifer Pursley |
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Total Pages | : 4 |
Release | : 2006 |
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Download Studies of Orbitally Excited D^**_(s) and B^** Mesons at Cdf and Book in PDF, ePub and Kindle
Using a large data sample of p{bar p} collisions at {radical}s = 1.96 TeV recorded by the CDF and D0 detectors operating at Fermilab Tevatron, the orbitally excited B mesons B{sub 1} and B*{sub 2} are observed directly as two separate states in fully reconstructed decays to B{sup (*)}{pi}. The masses and the mass differences between the states are presented. In the charm system, the orbitally excited D mesons D{sub 1} and D*{sub 2} are observed in fully reconstructed decays to D{sup (*)}{pi}. Measurements of the product branching rates of semileptonic decays B {yields} {bar D}**{mu}{sup +}{nu}{sub {mu}}X and their ratio are presented. They also present the observation of the semileptonic decays B{sub s} {yields} {mu}{nu}D**{sub s} where the excited D**{sub s} states are reconstructed in the mode D**{sub s} {yields} D*K{sub S}{sup 0}.
Author | : Martin Heck |
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Release | : 2009 |
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Download Spectroscopy of Orbitally Excited Bs Mesons with the CDF II Detector Book in PDF, ePub and Kindle
Author | : |
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Total Pages | : 169 |
Release | : 2009 |
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Download Search for Orbitally Excited B Mesons with the CDF II Detector Book in PDF, ePub and Kindle
Author | : |
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Release | : 2009 |
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Download Spectroscopy of Orbitally Excited $B_{s}$ Mesons with the CDF II Detector Book in PDF, ePub and Kindle
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Total Pages | : 7 |
Release | : 2008 |
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Download Measurement of Resonance Parameters of Orbitally Excited Narrow B0̂ Mesons Book in PDF, ePub and Kindle
The authors report a measurement of resonance parameters of the orbitally excited (L = 1) narrow B° mesons in decays to B{sup (*)+}?− using 1.7 fb−1 of data collected by the CDF II detector at the Fermilab Tevatron. The mass and width of the B*2° state are measured to be m(B*2°) = 5740.2{sub -1.8}{sup +1.7}(stat.){sub -0.8}{sup +0.9}(syst.) MeV/c2 and?(B*2°) = 22.7{sub -3.2}{sup +3.8}(stat.){sub -10.2}{sup +3.2}(syst.) MeV/c2. The mass difference between the B*2° and B1° states is measured to be 14.9{sub -2.5}{sup +2.2}(stat.){sub -1.4}{sup +1.2}(syst.) MeV/c2, resulting in a B1° mass of 5725.3{sub -2.2}{sup +1.6}(stat.){sub -1.5}{sup +1.4}(syst.) MeV/c2. This is currently the most precise measurement of the masses of these states and the first measurement of the B*2° width.
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Total Pages | : 297 |
Release | : 2008 |
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Download Observations and Measurements of Orbitally Excited L Book in PDF, ePub and Kindle
This thesis describes investigations of the first set of orbitally excited (L = 1) states for both the Bd0 and Bs0 meson systems (B**d and B**s). The data sample corresponds to 1.35 fb-1 of integrated luminosity, collected in 2002-2006 by the D0 detector, during the Run IIa operation of the Tevatron p$\bar{p}$ colliding beam accelerator. The B**d states are fully reconstructed in decays to B(*)+ [pi]-, with B(*)+ → [gamma] J/[Psi]K+, J/[Psi] → [mu]+[mu]-, yielding 662 ± 91 events, and providing the first strong evidence for the resolution of two narrow resonances, B1 and B*2. The masses are extracted from a binned [Chi]2 fit to the invariant mass distribution, giving M(B1) = 5720.7 ± 2.4(stat.) ± 1.3(syst.) ± 0.5 (PDG) MeV/c2 and M(B*2) = 5746.9 ± 2.4(stat.) ± 1.0(syst.) ± 0.5(PDG) MeV/c2. The production rate of narrow B**d → B[pi] resonances relative to the B+ meson is determined to be [13.9 ± 1.9(stat.) ± 3.2(syst.)]%. The same B+ sample is also used to reconstruct the analogous states in the Bs0 system, in decays B**s → B(*)+ K-. A single resonance in the invariant mass distribution is found with a statistical significance of 5[sigma], interpreted as the B*s2 state. The mass is determined to be M(B*s2) = 5839.6 ± 1.1(stat.) ± 0.4(syst.) ± 0.5(PDG) MeV/c 2, and the production rate of B*s2 → BK resonances is measured to be a fraction (2.14 ± 0.43 ± 0.24)% of the corresponding rate for B+ mesons. Alternative fitting hypotheses give inconclusive evidence for the presence of the lighter Bs1 meson.