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Measurements Of Bottom Anti Bottom Azimuthal Production Correlations In Proton Anti Proton Collisions At Su
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Book Synopsis Measurements of Bottom Anti-bottom Azimuthal Production Correlations in Proton - Anti-proton Collisions at S**1/2 by :
Download or read book Measurements of Bottom Anti-bottom Azimuthal Production Correlations in Proton - Anti-proton Collisions at S**1/2 written by and published by . This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have measured the azimuthal angular correlation of b{bar b} production, using 86.5 pb−1 of data collected by Collider Detector at Fermilab (CDF) in p{bar p} collisions at √s = 1.8 TeV during 1994-1995. In high-energy p{bar p} collisions, such as at the Tevatron, b{bar b} production can be schematically categorized into three mechanisms. The leading-order (LO) process is ''flavor creation'', where both b and {bar b} quarks substantially participate in the hard scattering and result in a distinct back-to-back signal in final state. The ''flavor excitation'' and the ''gluon splitting'' processes, which appear at next-leading-order (NLO), are known to make a comparable contribution to total b{bar b} cross section, while providing very different opening angle distributions from the LO process. An azimuthal opening angle between bottom and anti-bottom, [Delta][phi], has been used for the correlation measurement to probe the interaction creating b{bar b} pairs. The [Delta][phi] distribution has been obtained from two different methods. one method measures the [Delta][phi] between bottom hadrons using events with two reconstructed secondary vertex tags. The other method uses b{bar b} → (J/[psi]X)(lX') events, where the charged lepton (l) is an electron (e) or a muon ([mu]), to measure [Delta][phi] between bottom quarks. The b{bar b} purity is determined as a function of [Delta][phi] by fitting the decay length of the J/[psi] and the impact parameter of the l. Both methods quantify the contribution from higher-order production mechanisms by the fraction of the b{bar b} pairs produced in the same azimuthal hemisphere, f{sub toward}. The measured f{sub toward} values are consistent with both parton shower Monte Carlo and NLO QCD predictions.
Book Synopsis Measurements of Bottom Anti-bottom Azimuthal Production Correlations in Proton - Anti-proton Collisions at S**ư by :
Download or read book Measurements of Bottom Anti-bottom Azimuthal Production Correlations in Proton - Anti-proton Collisions at S**ư written by and published by . This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have measured the azimuthal angular correlation of b{bar b} production, using 86.5 pb−1 of data collected by Collider Detector at Fermilab (CDF) in p{bar p} collisions at √s = 1.8 TeV during 1994-1995. In high-energy p{bar p} collisions, such as at the Tevatron, b{bar b} production can be schematically categorized into three mechanisms. The leading-order (LO) process is ''flavor creation'', where both b and {bar b} quarks substantially participate in the hard scattering and result in a distinct back-to-back signal in final state. The ''flavor excitation'' and the ''gluon splitting'' processes, which appear at next-leading-order (NLO), are known to make a comparable contribution to total b{bar b} cross section, while providing very different opening angle distributions from the LO process. An azimuthal opening angle between bottom and anti-bottom,??, has been used for the correlation measurement to probe the interaction creating b{bar b} pairs. The?? distribution has been obtained from two different methods. one method measures the?? between bottom hadrons using events with two reconstructed secondary vertex tags. The other method uses b{bar b} → (J/?X)(lX') events, where the charged lepton (l) is an electron (e) or a muon , to measure?? between bottom quarks. The b{bar b} purity is determined as a function of?? by fitting the decay length of the J/? and the impact parameter of the l. Both methods quantify the contribution from higher-order production mechanisms by the fraction of the b{bar b} pairs produced in the same azimuthal hemisphere, f{sub toward}. The measured f{sub toward} values are consistent with both parton shower Monte Carlo and NLO QCD predictions.
Book Synopsis A Measurement of B Hadron Correlations in Proton-antiproton Collisions at Center of Mass Energy by : Kevin Patrick Lannon
Download or read book A Measurement of B Hadron Correlations in Proton-antiproton Collisions at Center of Mass Energy written by Kevin Patrick Lannon and published by . This book was released on 2003 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of B Hadron Correlations in Proton-antiproton Collisions at Center of Mass Energy by :
Download or read book A Measurement of B Hadron Correlations in Proton-antiproton Collisions at Center of Mass Energy written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the T Anti-t Production Cross-section in Proton Anti-proton Collisions at S**(1/2) by :
Download or read book A Measurement of the T Anti-t Production Cross-section in Proton Anti-proton Collisions at S**(1/2) written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Not Provided.
Book Synopsis A Measurement of the Production Cross Section of Tt Pairs in Proton-antiproton Collisions at [square Root]s by : Henri Bachacou
Download or read book A Measurement of the Production Cross Section of Tt Pairs in Proton-antiproton Collisions at [square Root]s written by Henri Bachacou and published by . This book was released on 2004 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the Top-antitop Production Cross Section in Proton-antiproton Collisions at Center of Mass Energy by : Ulysses Allen Grundler
Download or read book A Measurement of the Top-antitop Production Cross Section in Proton-antiproton Collisions at Center of Mass Energy written by Ulysses Allen Grundler and published by ProQuest. This book was released on 2008 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: I present a measurement of the tt¯ production cross section at s = 1.96 TeV using 2034 pb-1 of CDF Run II data using events with a high transverse momentum electron or muon, three or more jets, and missing transverse energy. The measurement assumes a t → Wb branching fraction of 100 percent. Events consistent with tt¯ decay are found by identifying jets containing heavy-flavor semileptonic decays to muons. The dominant backgrounds are evaluated directly from the data. Based on 248 candidate events and an expected background of 86.8+/-5.6 events, I measure a production cross section of 8.7+/-1.1+0.9-0.8+/-0.6 pb, in agreement with the Standard Model.
Book Synopsis Measurement of the W + Gamma Production in Proton - Anti-proton Collisions at S**(1/2) by : Michael H. Kirby
Download or read book Measurement of the W + Gamma Production in Proton - Anti-proton Collisions at S**(1/2) written by Michael H. Kirby and published by . This book was released on 2004 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of the {bar p}p {yields} W{gamma} + X {yields} e{nu}{gamma} + X production cross section using data form the Collider Detector at Fermilab. The p{bar p} collisions were provided by the Tevatron Collider at a center of mass energy of 1.96 TeV. Electroweak theory includes the trilinear vector boson coupling, WW{gamma}, which contributes to the e{nu}{gamma} final state. The electron decay channel of the W provides a clean sample to study the production of diboson pairs. The measurement of the production cross section tests the structure of the non-Abelian character of Electroweak theory.
Book Synopsis Measurement of the Proton-antiproton Pair Production from Two-photon Collisions at TRISTAN by : H. Hamasaki
Download or read book Measurement of the Proton-antiproton Pair Production from Two-photon Collisions at TRISTAN written by H. Hamasaki and published by . This book was released on 1997 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Z Boson Transverse Momentum in Proton-antiproton Collisions at Sqrt(s) by :
Download or read book Measurement of Z Boson Transverse Momentum in Proton-antiproton Collisions at Sqrt(s) written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Direct Measurement of the W Boson Decay Width in Proton-antiproton Collisions at 1.8 TeV by : William Joseph Ashmanskas
Download or read book A Direct Measurement of the W Boson Decay Width in Proton-antiproton Collisions at 1.8 TeV written by William Joseph Ashmanskas and published by . This book was released on 1998 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the T T_bar Production Cross Section in Proton-antiproton Collisions at Sqrt(s) by : Markus Klute
Download or read book A Measurement of the T T_bar Production Cross Section in Proton-antiproton Collisions at Sqrt(s) written by Markus Klute and published by . This book was released on 2004 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preliminary Studies Concerning [Delta Gamma]Bs Measurements in Proton Antiproton Collisions at [root Of]s by : Matthew S. Martin
Download or read book Preliminary Studies Concerning [Delta Gamma]Bs Measurements in Proton Antiproton Collisions at [root Of]s written by Matthew S. Martin and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the CP Asymmetry in Semimuonic B Decays Produced in Proton-Antiproton Collisions at Center of Mass Energy by :
Download or read book Measurement of the CP Asymmetry in Semimuonic B Decays Produced in Proton-Antiproton Collisions at Center of Mass Energy written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the Tt̄ Production Cross Section in Proton-antiproton Collisions at [square Root S] by : Markus Klute
Download or read book A Measurement of the Tt̄ Production Cross Section in Proton-antiproton Collisions at [square Root S] written by Markus Klute and published by . This book was released on 2004 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Azimuthal Angle Distribution of Leptons from W Boson Decays as a Function of the W Transverse Momentum in P Anti-p Collisions at S**1/2 by :
Download or read book Measurement of the Azimuthal Angle Distribution of Leptons from W Boson Decays as a Function of the W Transverse Momentum in P Anti-p Collisions at S**1/2 written by and published by . This book was released on 2005 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first measurement of the A2 and A3 angular coefficients of the W boson produced in proton-antiproton collisions. We study W → ev{sub e} and W → [mu][nu]{sub {mu}} candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at √s = 1.8 TeV. The corresponding integrated luminosity was 110 pb−1. The jet balances the transverse momentum of the W and introduces QCD effects in W boson production. The extraction of the angular coefficients is achieved through the direct measurement of the azimuthal angle of the charged lepton in the Collins-Soper rest-frame of the W boson. The angular coefficients are measured as a function of the transverse momentum of the W boson. The electron, muon, and combined results are in good agreement with the Standard Model prediction, up to order [alpha]{sub s}2 in QCD.
Book Synopsis Measurement of Z Boson Transverse Momentum in Proton - Anti-proton Collisions at S**1/2 by :
Download or read book Measurement of Z Boson Transverse Momentum in Proton - Anti-proton Collisions at S**1/2 written by and published by . This book was released on 2007 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes a measurement of the shape of the boson transverse momentum distribution in p{bar p} 2!Z/[gamma]* 2!ee− + X events at a center-of-mass energy of 1.96 TeV. The measurement is made for events with electron-positron mass between 70
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