Measurement Of The Double Differential Diject Mass Cross Section In P Bar P Collisions At U221a S
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Measurement Of The Double Differential Diject Mass Cross Section In P Bar P Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2009
Measurement Of The Double Differential Diject Mass Cross Section 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 2009 with categories.
This thesis presents the analysis of the double differential dijet mass cross section, measured at the D0 detector in Batavia, IL, using p$ar{p}$ collisions at a center of mass energy of √s = 1.96 TeV. The dijet mass was calculated using the two highest pT jets in the event, with approximately 0.7 fb-1 of data collected between 2004 and 2005. The analysis was presented in bins of dijet mass (MJJ) and rapidity (y), and extends the measurement farther in MJJ and y than any previous measurement. Corrections due to detector effects were calculated using a Monte Carlo simulation and applied to data. The errors on the measurement consist of statistical and systematic errors, of which the Jet Energy Scale was the largest. The final result was compared to next-to-leading order theory and good agreement was found. These results may be used in the determination of the proton parton distribution functions and to set limits on new physics.
Measurement Of The Double Differential Diject Mass Cross Section In Pp Bar Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2009
Measurement Of The Double Differential Diject Mass Cross Section In Pp Bar Collisions At Sqrt 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 2009 with categories.
This thesis presents the analysis of the double differential dijet mass cross section, measured at the D0 detector in Batavia, IL, using p{bar p} collisions at a center of mass energy of (square root)s = 1.96 TeV. The dijet mass was calculated using the two highest p{sub T} jets in the event, with approximately 0.7 fb−1 of data collected between 2004 and 2005. The analysis was presented in bins of dijet mass (M{sub JJ}) and rapidity (y), and extends the measurement farther in M{sub JJ} and y than any previous measurement. Corrections due to detector effects were calculated using a Monte Carlo simulation and applied to data. The errors on the measurement consist of statistical and systematic errors, of which the Jet Energy Scale was the largest. The final result was compared to next-to-leading order theory and good agreement was found. These results may be used in the determination of the proton parton distribution functions and to set limits on new physics.
Measurement Of The Diphoton Differential Cross Section In P Bar P Collisions At Square Root S
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Author : Joshua Marc Dyer
language : en
Publisher:
Release Date : 2007
Measurement Of The Diphoton Differential Cross Section In P Bar P Collisions At Square Root S written by Joshua Marc Dyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Differential cross sections categories.
Measurement Of The Production And Differential Cross Sections Of W W Bosons In Association With Jets In P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of The Production And Differential Cross Sections Of W W Bosons In Association With Jets In P Bar P Collisions At Sqrt 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 2015 with categories.
In this study, we present a measurement of the W-boson-pair production cross section in pp¯ collisions at 1.96 TeV center-of-mass energy and the first measurement of the differential cross section as a function of jet multiplicity and leading-jet energy. The W+W– cross section is measured in the final state comprising two charged leptons and neutrinos, where either charged lepton can be an electron or a muon. Using data collected by the CDF experiment corresponding to 9.7 fb–1 of integrated luminosity, a total of 3027 collision events consistent with W+W– production are observed with an estimated background contribution of 1790±190 events. The measured total cross section is ?(pp¯→W+W–) = 14.0 ± 0.6(stat)+1.2–1.0 (syst)±0.8 (lumi) pb, consistent with the standard model prediction.
Measurement Of The Differential Dijet Production Cross Section In Proton Proton Collisions At
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Author :
language : en
Publisher:
Release Date : 2011
Measurement Of The Differential Dijet Production Cross Section In Proton Proton Collisions At written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A measurement of the double-differential inclusive dijet production cross section in proton-proton collisions at sqrt(s)=7 TeV is presented as a function of the dijet invariant mass and jet rapidity. The data correspond to an integrated luminosity of 36 inverse picobarns, recorded with the CMS detector at the LHC. The measurement covers the dijet mass range 0.2 TeV to 3.5 TeV and jet rapidities up to.
Measurement Of The Differential And Double Differential Drell Yan Cross Sections In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of The Differential And Double Differential Drell Yan Cross Sections In Proton Proton Collisions At Sqrt 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 2013 with categories.
Measurements of the differential and double-differential Drell-Yan cross sections are presented using an integrated luminosity of 4.5(4.8) inverse femtobarns in the dimuon (dielectron) channel of proton-proton collision data recorded with the CMS detector at the LHC at sqrt{s} = 7 TeV. The measured inclusive cross section in the Z-peak region (60-120 GeV) is \sigma(\ell \ell) = 986.4 +/- 0.6 (stat.) +/- 5.9 (exp. syst.) +/- 21.7 (th. syst.) +/- 21.7 (lum.) pb for the combination of the dimuon and dielectron channels. Differential cross sections $d\sigma/dm$ for the dimuon, dielectron, and combined channels are measured in the mass range 15 to 1500 GeV and corrected to the full phase space. Results are also presented for the measurement of the double-differential cross section d2̂\sigma/dm d.
Measurement Of The Diphoton Differential Cross Section In P Anti P Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2007
Measurement Of The Diphoton Differential Cross Section In P Anti 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 2007 with categories.
The diphoton differential cross-section as a function of mass up to 300 GeV/c2, qT up to 100 GeV/c, and opening angle over a range of 0 to ? radians is measured. The measurement is performed using 1046.19 pb-1 of data collected at Fermi National Accelerator Laboratory using the D0 detector. This analysis considers all direct diphoton states but attempts to suppress contributions due to fragmentation.
Measurement Of The Double Differential High Mass Drell Yan Cross Section In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Measurement Of The Double Differential High Mass Drell Yan Cross Section In Pp Collisions At Sqrt 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 2016 with categories.
This study presents a measurement of the double-differential cross section for the Drell-Yan Z/[gamma]* → l+l- and photon-induced [gamma][gamma] → l+l- processes where l is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, mll, between 116 GeV and 1500 GeV using a sample of 20.3 fb-1 of pp collisions data at centre-of-mass energy of √s = 8 TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of mll is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1% is achieved at low mll. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated.
Measurement Of The T Anti T Production Cross Section In P Anti P Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2006
Measurement Of The T Anti T Production Cross Section In P Anti P Collisions At S 1 2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The authors present a measurement of the t{bar t} production cross section using events with one charged lepton and jets from p{bar p} collisions at a center-of-mass energy of 1.96 TeV. A b-tagging algorithm based on the probability of displaced tracks coming from the event interaction vertex is applied to identify b quarks from top decay. Using 318 pb−1 of data collected with the CDF II detector, they measure the t{bar t} production cross section in events with at least one restrictive (tight) b-tagged jet and obtain 8.9{sub -1.0}{sup +1.0}(stat.){sub -1.0}{sup +1.1}(syst.) pb. The cross section value assumes a top quark mass of m{sub t} is presented in the paper. This result is consistent with other CDF measurements of the t{bar t} cross section using different samples and analysis techniques, and has similar systematic uncertainties. They have also performed consistency checks by using the b-tagging probability function to vary the signal to background ratio and also using events that have at least two b-tagged jets.
Measurement Of The Diphoton Differential Cross Section In P Anti P Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2007
Measurement Of The Diphoton Differential Cross Section In P Anti P Collisions At S 1 2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
The diphoton differential cross-section as a function of mass up to 300 GeV/c2, q{sub T} up to 100 GeV/c, and opening angle over a range of 0 to [pi] radians is measured. The measurement is performed using 1046.19 pb−1 of data collected at Fermi National Accelerator Laboratory using the D0 detector. This analysis considers all direct diphoton states but attempts to suppress contributions due to fragmentation.