Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton Collisions At U221a S
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Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2004
Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton 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 2004 with categories.
This thesis presents the measurement of prompt diphoton production rate in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV using the upgraded Collider Detector at Fermilab (CDF II). This process deserves some attention for the following reasons. The H → ?? decay mode is an important channel for the Standard Model (SM) Higgs boson searches in the low mass region (MH 130 GeV) at the forth coming LHC. In many models involving physics beyond the SM, cascade decays of heavy new particles generate a ?? signature. Some examples are supersymmetry with a light gravitino, radiative decays to a higgsino-LSP and models with large symmetry groups. The QCD production of prompt photon pairs with large invariant mass is the irreducible background to these searches. The rate is huge and requires to be quantitatively evaluated prior to any of the possible discoveries. In a hadronic collider environment such as LHC, prompt photon signals are contaminated by the production of neutral mesons which decay to multiple collinear photons. The experience of classifying background of neutral meson is very important. The process can be used to test the Next-to-Leading Order (NLO) calculation of Quantum Chromodynamics (QCD). The 4-momentum of particles in the di-photon final state can be precisely determined due to the fine energy resolution of the electromagnetic calorimeters. The imbalance in the transverse momentum of the two photons reflects the transverse motion of the colliding partons. At collider energies, most of the transverse momentum of the incoming partons can be attributed to multiple soft gluon emissions prior to the collision, of which the effect to di-photon production can be resummed by Collins-Soper-Sterman (CSS) formalism. The Tevatron data can be used to test the resummation formalisms. They have used 207 pbsup-1
Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton Collisions At S 1 2
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Author : Yan-wen Liu
language : en
Publisher:
Release Date : 2004
Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton Collisions At S 1 2 written by Yan-wen Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
This thesis presents the measurement of prompt diphoton production rate in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV using the upgraded Collider Detector at Fermilab (CDF II). This process deserves some attention for the following reasons. The H {yields} {gamma}{gamma} decay mode is an important channel for the Standard Model (SM) Higgs boson searches in the low mass region (M{sub H}
Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton Collisions At S 1 2
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2005
Measurement Of The Cross Section For Production Of Prompt Diphoton In Proton Anti Proton 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 2005 with categories.
This thesis presents the measurement of prompt diphoton production rate in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV using the upgraded Collider Detector at FermiLab (CDF II). This process deserves some attention for the following reasons. The H [yields] [gamma][gamma] decay mode is an important channel for the Standard Model (SM) Higgs boson searches in the low mass region (M[sub H]
Measurement Of The Inclusive Isolated Prompt Photon Cross Section In P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Measurement Of The Inclusive Isolated Prompt Photon Cross Section 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 2016 with categories.
The measurement of the cross section for the inclusive production of isolated prompt photons in proton-antiproton collisions at $\sqrt{s}$=1.96~TeV is presented. The data set corresponds to an integrated luminosity of 9.5~fb$^{-1}$, collected with the Collider Detector at Fermilab in Run~II. The measurement is performed as a function of the photon transverse energy ($E_T^{\gamma}$) covering the range of 30~GeV$
Measurement Of The Cross Section For Prompt Diphoton Production In P Anti P Collisions At S
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Author :
language : en
Publisher:
Release Date : 2004
Measurement Of The Cross Section For Prompt Diphoton Production In P Anti 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 2004 with categories.
Measurement Of The Cross Section For Prompt Diphoton Production In P Anti P Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2004
Measurement Of The Cross Section For Prompt Diphoton Production 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 2004 with categories.
Measurements Of The B Production Cross Section In Proton Antiproton Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2006
Measurements Of The B Production Cross Section In Proton Antiproton 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 2006 with categories.
The authors present a measurement of the cross section of b hadron (Hb) production in p$ar{p}$ collisions at √s = 1.96 TeV using the CDF II detector at the Fermilab Tevatron. They use 83 pb-1 of data taken between october 2002 and May 2003 that was collected with a trigger sensitive to high momentum muons and displaced tracks. They use partially reconstructed decays in the following modes: Hb → ?- $ar{v}$?D0X, D0 → K-?+, and Hb → ?-$ar{v}$?D*+ X, D*+ → D0?+, D0 → K- ?+, and their charge conjugates. They correct for the backgrounds from c$ar{c}$ and b$ar{b}$ decays, for trigger and reconstruction efficiencies, and for detector acceptance. They report the total cross section above a minimum transverse momentum (pT) of 9 GeV/c for the rapidity range.
Measurement Of Top Anti Top Cross Section In Proton Anti Proton Collider At U221a S
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of Top Anti Top Cross Section In Proton Anti Proton Collider 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.
Discovery of the top quark in 1995 at the Fermilab Tevatron collider concluded a long search following the 1977 discovery of bottom (b) quark [1] and represents another triumph of the Standard Model (SM) of elementary particles. Top quark is one of the fundamental fermions in the Standard Model of electroweak interactions and is the weak-isospin partner of the bottom quark. A precise measurement of top pair production cross-section would be a test of Quantum Chromodynamics (QCD) prediction. Presently, Tevatron is the world's highest energy collider where protons (p) and anti-protons ($ar{p}$) collide at a centre of mass energy √s of 1.96 TeV. At Tevatron top (t) and anti-top ($ar{t}$) quarks are predominantly pair produced through strong interactions--quark annihilation (≅ 85%) and gluon fusion (≅ 15%). Due to the large mass of top quark, t or $ar{t}$ decays ( ̃10-25 sec) before hadronization and in SM framework, it decays to a W boson and a b quark with ̃100% branching ratio (BR). The subsequent decay of W boson determines the major signatures of t$ar{t}$ decay. If both W bosons (coming from t and $ar{t}$ decays) decay into leptons (viz., eve, ?v? or ?c?) the corresponding t$ar{t}$ decay is called dileptonic decay. Of all dileptonic decay modes of t$ar{t}$, the t$ar{t}$ → WWb$ar{b}$ → eve?v?b$ar{b}$ (e? channel) decay mode has the smallest background contamination from Z0 production or Drell-Yan process; simultaneously, it has the highest BR ( ̃3.16%) [2] amongst all dileptonic decay modes of t$ar{t}$. During Run I (1992-1996) of Tevatron, three e? candidate events were detected by D0 experiment, out of 80 candidate events (inclusive of all decay modes of t$ar{t}$). Due to the rarity of the t$ar{t}$ events, the measured cross-section has large uncertainty in its value (viz., 5.69 ± 1.21(stat) ± 1.04(sys) pb @ √s = 1.8 TeV measured by D0 [3]). This analysis presents a cross section measurement in e? channel utilizing ̃228 pb-1 of data collected by D0 experiment during Tevatron Run II (between June 2002 and April 2004).
A Measurement Of The Top Antitop Production Cross Section In The Dimuon Final State With The D0 Detector For Proton Antiproton Collisions As U221a S
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Author :
language : en
Publisher:
Release Date : 2007
A Measurement Of The Top Antitop Production Cross Section In The Dimuon Final State With The D0 Detector For Proton Antiproton Collisions As 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.
A measurement of the top pair production cross section in the dimuon final state for proton-antiproton collisions at √s = 1.96 TeV is presented. Approximately 420 pb-1 of data collected with the Run II D0 detector are used for this measurement. Two data events are observed with a total expected signal plus background yield of 3.6 events. Assuming a top mass of 175 GeV, the measured cross section is: ?t$ar{t}$= 3.13$+4.17top{-2.60}$(stat)$+0.92top{-0.86}$(sys)±0.19(lumi)pb, which is consistent with a NNLO prediction of 6.77 ± 0.42 pb.
Measurement Of The Inclusive Isolated Prompt Photon Cross Section In P Bar P Collisions Using The Full Cdf Data Set
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Author :
language : en
Publisher:
Release Date : 2017
Measurement Of The Inclusive Isolated Prompt Photon Cross Section In P Bar P Collisions Using The Full Cdf Data Set written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
A measurement of the inclusive production cross section of isolated prompt photons in proton-antiproton collisions at center-of-mass energy $\sqrt{s}$=1.96TeV is presented. The results are obtained using the full Run II data sample collected with the Collider Detector at the Fermilab Tevatron, which corresponds to an integrated luminosity of 9.5fb$^{-1}$. The cross section is measured as a function of photon transverse energy, $E_T^{\gamma}$, in the range 30$