Study Of Charged Particle Species Produced In Association With Bar B 0 B And Bar B 0 Atop S Mesons In P Bar P Collisions At U221a S

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Study Of Charged Particle Species Produced In Association With Bar B 0 B And Bar B 0 Atop S Mesons In P Bar P Collisions At U221a S

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Author :
language : en
Publisher:
Release Date : 2005

Study Of Charged Particle Species Produced In Association With Bar B 0 B And Bar B 0 Atop S Mesons In P Bar P Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb-1 of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B0 → l+D-X, D- → K+?-?-; B0 → l+D*-X, D*- → ?-$ar{D}$0,$ar{D}$0 → K+?-; B+ → l+$ar{D}$0X, $ar{D}$0 → K+?-; Bs→l+D$-top{s}$ X, D$-top{s}$ → ?-?,? → K+K-. The K, ?, and p are identified using the Time of Flight detector (TOF), the CDF spectrometer, and the specific ionization (dE/dx) measured in the central drift chamber (COT). The fraction of charged kaons produced in association with $ar{B}$$0top{s}$ mesons is found to be larger than the fraction produced in association with the $ar{B}$$0top{s}$ and B- mesons, as expected from naive models of heavy quark hadronization to mesons. The particle species yields are found to be in qualitative agreement with simulation of B meson production in hadron collisions from the PYTHIA Monte Carlo, although the yield of kaons around $ar{B}$$0top{s}$ mesons is found to be larger in the simulation when compared to the data. These studies are important for understanding methods of identifying the flavor of $ar{B}$$0top{s}$ mesons in measurement of $ar{B}$$0top{s}$ flavor oscillations and charge conjugation-parity (CP) violation in $ar{B}$$0top{s}$ meson decays.

Study Of Charged Particle Species Produced In Association With B0 B And Bs Mesons In Proton Anti Proton Collisions At S 1 2

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Author : Denys Usynin
language : en
Publisher:
Release Date : 2005

Study Of Charged Particle Species Produced In Association With B0 B And Bs Mesons In Proton Anti Proton Collisions At S 1 2 written by Denys Usynin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb{sup -1} of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B{sup 0} {yields} {ell}{sup +}D{sup -}X, D{sup -} {yields} K{sup +}{pi}{sup -}{pi}{sup -}; B{sup 0} {yields} {ell}{sup +}D*{sup -}X, D*{sup -} {yields} {pi}{sup -}{bar D}{sup 0}, {bar D}{sup 0} {yields} K{sup +}{pi}{sup -}; B{sup +} {yields} {ell}{sup +}{bar D}{sup 0}X, {bar D}{sup 0} {yields} K{sup +}{pi}{sup -}; B{sub s}{yields}{ell}{sup +}D{sub s}{sup -}X, D{sub s}{sup -} {yields} {pi}{sup -}{phi}, {phi} {yields} K{sup +}K{sup -}. The K, {pi}, and p are identified using the Time of Flight detector (TOF), the CDF spectrometer, and the specific ionization (dE/dx) measured in the central drift chamber (COT). The fraction of charged kaons produced in association with {bar B}{sub s}{sup 0} mesons is found to be larger than the fraction produced in association with the {bar B}{sup 0} and B{sup -} mesons, as expected from naive models of heavy quark hadronization to mesons. The particle species yields are found to be in qualitative agreement with simulation of B meson production in hadron collisions from the PYTHIA Monte Carlo, although the yield of kaons around {bar B}{sub s}{sup 0} mesons is found to be larger in the simulation when compared to the data. These studies are important for understanding methods of identifying the flavor of {bar B}{sub s}{sup 0} mesons in measurement of {bar B}{sub s}{sup 0} flavor oscillations and charge conjugation-parity (CP) violation in {bar B}{sub s}{sup 0} meson decays.

Study Of Charged Particle Species Produced In Association With B 0 B And B 0 S Mesons In Pp Collisions At Square Root S

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Author : Denys Usynin
language : en
Publisher:
Release Date : 2005

Study Of Charged Particle Species Produced In Association With B 0 B And B 0 S Mesons In Pp Collisions At Square Root S written by Denys Usynin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

Observation Of Pi B Meson Charge Flavor Correlations And Measurement Of Time Dependent B Bbar Mixing In P Bar P Collisions

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Author :
language : en
Publisher:
Release Date : 1996

Observation Of Pi B Meson Charge Flavor Correlations And Measurement Of Time Dependent B Bbar Mixing In P Bar P Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.

We present evidence for charge correlations of {ital B} mesons with charged particles produced in {ital p{anti p}} Collisions at 1.8 TeV. Such correlations are expected to arise from pious produced in the fragmentation chain and from {ital B}{sup **} decays. We measure the efficiency and purity of this flavor tagging method for both charged and neutral {ital B} mesons. We apply these correlations to {ital B} mesons reconstructed in 110 pb−1 of data collected with the CDF detector at the Fermilab Tevatron Collider. {ital B} mesons are either partially reconstructed, using the semileptonic decays {ital B}° 2!{ital l}{ital D}{sup (*)-}{ital X} and {ital B} 2!{ital l}+{ital {anti D}X}, or fully reconstructed, using the decay modes {ital B}° 2!{ital J/{Psi}K{sup *0}} and {ital B}+ 2!{ital J/{Psi}K+}. Application of this new flavor tagging method to neutral {ital B} mesons yields a measurement of the frequency of the oscillation {ital B}° 2!{ital {anti B}}°. We obtain [Delta]{ital m{sub d}} = 0.446 ± 0.057{sup +0.034}{sub -0.031}.

La Vallese

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language : en
Publisher:
Release Date : 1869

La Vallese written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1869 with categories.

Measurement Of The Mass Of The B Sub S Meson In Bar P P Collisions At S

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Author :
language : en
Publisher:
Release Date : 1995

Measurement Of The Mass Of The B Sub S Meson In Bar P P Collisions At S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

We measure the mass of the B{sub s}° meson by fully reconstructing the decay B{sub s}° → J/?? with the subsequent decays J/? →??− and? → K+ K−. The data was obtained from 19.3 pb−1 of integrated luminosity of {bar p}p collisions at √s = 1.8 TeV using the Collider Detector at Fermilab (CDF). A sample of 80,000 inclusive J/? →?+?− events is used to study systematic biases in track reconstruction and is used to calibrate the momentum scale. We reconstruct the kinematically similar decays B− → J/? K− and B° → J/? K* to study the mass measurement technique used for the B° meson. Based on the observation of 32 ± 6 candidates, the mass of the B{sub s}° meson is measured to be 5369.9 ± 2.3 ± 1.3 MeV/c2.

Observation Of Excited B Mesons In P Pbar Collisions A Square Root S

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language : en
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Release Date : 1999

Observation Of Excited B Mesons In P Pbar Collisions A Square Root S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

Production of orbitally excited (L = 1) states of B mesons, B{sup **}, is studied using a sample of nearly ten thousand partially reconstructed B mesons collected with the CDF detector from p{anti p} collisions at (square root)s = 1.8 TeV. Ambiguities in the reconstruction of the B flavor and momentum are resolved. The fraction of b quarks that hadronize into an L = 1 state is measured to be 0.28 " 0.06(stat) " 0.03(syst), and the collective mass of the B{sup **} states is measured to be m(B1) = 5.71 " 0.02 GeV/c2 given the mass splittings between the four states.

B Production At Cdf

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language : en
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Release Date : 2005

B Production At Cdf written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The production of b quarks in p[bar p] collisions is studied in the Collider Detector at Fermilab (CDF), using the B meson decay channels B[sup +] [yields] J/[psi]K[sup +] and B[sup 0] [yields] J/[psi]K*[sup 0], with J/[psi] [yields] [mu][sup +][mu][sup [minus]] and K*[sup 0] [yields] K[sup +][pi][sup [minus]], and their charge conjugates. Measurements of the B meson and b quark cross-sections integrated above minimum transverse momentum values in the rapidity range [vert-bar]y[vert-bar]

Observation Of Pi B Meson Charge Flavor Correlations And Measurement Of Time Dependent B Sup 0 Bbar Sup 0 Mixing In P Pbar Collisions

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Author :
language : en
Publisher:
Release Date : 1999

Observation Of Pi B Meson Charge Flavor Correlations And Measurement Of Time Dependent B Sup 0 Bbar Sup 0 Mixing In P Pbar Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

We present a study of time dependent B°-{anti B}° mixing in p{anti p} collisions at 1.8 TeV using 110 pb−1 collected with the CDF detector at the Fermilab Tevatron Collider. B mesons are partially reconstructed using the semileptonic decays B°→lD{sup (*)-}X and B+??2192?l+{anti D}°X (and their charge conjugates). B meson-charged pion correlations are used in order to determine the flavor of the B meson at t=0. Such correlations are expected to arise from pions produced in the fragmentation chain and also from B{sup **} decays. We measure the efficiency and purity of this flavor tagging method for both charged and neutral B mesons.

Observation Of Pi B Meson Charge Flavor Correlations And Measurement Of Time Dependent B Bbar Mixing In P Pbar Collisions

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Author :
language : en
Publisher:
Release Date : 1999

Observation Of Pi B Meson Charge Flavor Correlations And Measurement Of Time Dependent B Bbar Mixing In P Pbar Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

We present a study of time dependent B°-{anti B}° mixing in p{anti p} collisions at 1.8 TeV using 110 pb−1 collected with the CDF detector at the Fermilab Tevatron Collider. B mesons are partially reconstructed using the semileptonic decays B°-->lD{sup (*)-}X and B-->l+{anti D}°X (and their charge conjugates). B meson-charged pion correlations are used in order to determine the flavor of the B meson at t=0. Such correlations are expected to arise from pions produced in the fragmentation chain and also from B{sup **} decays. We measure the efficiency and purity of this flavor tagging method for both charged and neutral B mesons.