Measurement of Correlated B-bbar Production in P-pbar Collisions at S**1/2 PDF Download
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Languages : en
Pages : 55
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We present a measurement of the correlated b{bar b} production cross section. The data used in this analysis were taken with the upgraded CDF detector (CDF II) at the Fermilab Tevatron collider, and correspond to an integrated luminosity of 742 pb−1. We utilize muon pairs with invariant mass 5 ≤ m{sub [mu][mu]} ≤ 80 GeV/c2 produced by b{bar b} double semileptonic decays. For muons with p{sub T} ≥ 3 GeV/c and.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 55
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Book Description
We present a measurement of the correlated b{bar b} production cross section. The data used in this analysis were taken with the upgraded CDF detector (CDF II) at the Fermilab Tevatron collider, and correspond to an integrated luminosity of 742 pb−1. We utilize muon pairs with invariant mass 5 ≤ m{sub [mu][mu]} ≤ 80 GeV/c2 produced by b{bar b} double semileptonic decays. For muons with p{sub T} ≥ 3 GeV/c and.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 55
Get Book Here
Book Description
We present a measurement of the correlated b{bar b} production cross section. The data used in this analysis were taken with the upgraded CDF detector (CDF II) at the Fermilab Tevatron collider, and correspond to an integrated luminosity of 742 pb−1. We utilize muon pairs with invariant mass 5 ≤ m{sub??} ≤ 80 GeV/c2 produced by b{bar b} double semileptonic decays. For muons with p{sub T} ≥ 3 GeV/c and.
![The B[bar B] Production Cross Section and Correlations in P[bar P] Collisions At[radical] PDF](https://books.google.com/books/content/images/frontcover/oOqUDAEACAAJ?fife=w80-h100)
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Languages : en
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Book Description
The authors present measurements of the b[bar b] production cross section and angular correlations between the b and[bar b]-quarks in p[bar p] collisions using the D0 detector at the Fermilab Tevatron operating at[radical]s= 1.8 TeV. The b-quark production cross section for[vert-bar]y[sup b][vert-bar]1.0 and[rho][sub[tau]][sup b] 8 GeV/c is extracted and found to be consistent with next-to-leading order QCD predictions. In addition, the angular correlations between the b and[bar b]-quarks are found to agree in shape with next-to-leading order QCD predictions.
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Languages : en
Pages : 10
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Book Description
The authors present measurements of the b{bar b} production cross section and angular correlations between the b and {bar b}-quarks in p{bar p} collisions using the D0 detector at the Fermilab Tevatron operating at √s = 1.8 TeV. The b-quark production cross section for {vert_bar}y{sup b}{vert_bar} 1.0 and?{sub {tau}}{sup b} 8 GeV/c is extracted and found to be consistent with next-to-leading order QCD predictions. In addition, the angular correlations between the b and {bar b}-quarks are found to agree in shape with next-to-leading order QCD predictions.
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Languages : en
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Languages : en
Pages : 33
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A measurement of the angular correlations between beauty and anti-beauty hadrons (B B-bar) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction vertex. The differential B B-bar production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 inverse picobarns, shows that a sizable fraction of the B B-bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b b-bar production.
Author: Karen Ruth Gibson
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Languages : en
Pages : 169
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This thesis describes the first Run II measurement of b quark fragmentation into {bar B}{sup 0}, B{sup -}, and {bar B}{sub s}{sup 0} mesons and {Lambda}{sub b}{sup 0} baryons using semileptonic B decays. The result is based on 360 pb{sup -1} of data collected with the CDF detector in p{bar p} collisions at {radical}s = 1,960 GeV at the Tevatron Collider at Fermilab. The fragmentation fractions are measured for an effective {bar B} hadron p{sub T} threshold of 7 GeV/c to be f{sub u}/f{sub d} = 1.054 {+-} 0.018(stat){sub -0.045}{sup +0.025}(syst) {+-} 0.058(BR), f{sub s}/(f{sub u} + f{sub d}) = 0.160 {+-} 0.005(stat){sub -0.010}{sup +0.011}(syst){sub -0.034}{sup +0.057}(BR), and f{sub {Lambda}{sub b}}/(f{sub u} + f{sub d}) = 0.281 {+-} 0.012(stat){sub -0.056}{sup +0.058}(syst){sub -0.086}{sup +0.128}(BR). f{sub s}/(f{sub u} + f{sub d}) agrees both with previous CDF measurements and the world averages, dominated by the LEP measurements, with {approx} 1{sigma}. However, f{sub {Lambda}{sub b}}/(f{sub u} + f{sub d}) is approximately twice the value which has been measured at LEP and in CDF Run I and disagrees with the LEP results by approximately 2 {sigma}.
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Languages : en
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A number of recent B physics results from the CDF and D0 experiments at the Fermilab Tevatron Collider is reported. Measurements of open b quark production cross section in the central and forward rapidity regions in p{anti p} interactions at √s = 1800 GeV are presented. The measurements are used to evaluate the rapidity dependence of b quark production. We also report recent results on correlated b {anti b} production: a measurement of b {anti b} angular correlations using dimuon triggers (D0) and the first direct measurement of b {anti b} rapidity correlations (CDF). The results from the various measurements are compared with the next-to-leading order QCD predictions. Finally, a measurement by CDF of the polarization of [psi](2S) mesons is compared with the predictions of the Color Octet Model.
![B[bar B] Production Correlations, B[bar B] Mixing And[epsilon][sub B] at CDF. PDF](https://books.google.com/books/content/images/frontcover/Jf60DAEACAAJ?fife=w80-h100)
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We present preliminary measurements of b[bar b] production correlations, the average B[bar B] mixing, and a limit on the CP violating parameter[epsilon][sub b] using dimuon events from the dual semileptonic decay of b[bar b]. Data used in this analysis was taken during the 1992--1993 CDF run of the Fermilab Tevatron collider with an integrated luminosity of 17.4[plus-minus] 0.6 pb[sup[minus]1]. The results on b[bar b] production correlations are compared to predictions of next-to-leading order QCD.
