Measurement of the Drell-Yan Differential Cross Section and Forward-backward Asymmetry in Pp̄ [right Arrow] E E− Events Using the DØ Detector PDF Download
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![Measurement of the Drell-Yan Differential Cross Section and Forward-backward Asymmetry in Pp̄ [right Arrow] E E− Events Using the DØ Detector PDF](https://books.google.com/books/content/images/frontcover/BbsRm347eREC?fife=w150-h200)
Author: Raymond Gelhaus
Publisher:
ISBN:
Category : Fermions
Languages : en
Pages : 394
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![Measurement of the Drell-Yan Differential Cross Section and Forward-backward Asymmetry in Pp̄ [right Arrow] E E− Events Using the DØ Detector PDF](https://books.google.com/books/content/images/frontcover/BbsRm347eREC?fife=w80-h100)
Author: Raymond Gelhaus
Publisher:
ISBN:
Category : Fermions
Languages : en
Pages : 394
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Book Description
![Measurement of the Drell-Yan Differential Cross Section and Forward - Backward Asymmetry in Proton Anti-proton --] E+ E- Events Using the D0 Detector PDF](https://books.google.com/books/content/images/frontcover/M_G0DAEACAAJ?fife=w80-h100)
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Category :
Languages : en
Pages :
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![Measurement of the Drell-Yan Differential Cross Section and Forward - Backward Asymmetry in Proton Anti-proton --] E+ E- Events Using the D0 Detector PDF](https://books.google.com/books/content/images/frontcover/BoOwDAEACAAJ?fife=w80-h100)
Author: Raymond Gelhaus
Publisher:
ISBN:
Category :
Languages : en
Pages : 193
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Book Description
We present measurements of the inclusive Drell-Yan e{sup +}e{sup -} differential cross section (d{sigma}/dM{sub e{sup +}e{sup -}}) and forward-backward asymmetry (A{sub FB}) as a function of the dielectron invariant mass over the range 70-400 GeV/c{sup 2}. The data sample consists of 177.3 pb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV collected by the D0 detector. The results are consistent with the predictions of the standard model.
Author:
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Category :
Languages : en
Pages : 193
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Book Description
We present measurements of the inclusive Drell-Yan e+ e- differential cross section (d?/dMe+ e- and forward-backward asymmetry (AFB) as a function of the dielectron invariant mass over the range 70-400 GeV/c2. The data sample consists of 177.3 pb-1 of p$ar{p}$ collisions at √s = 1.96 TeV collected by the D0 detector. The results are consistent with the predictions of the standard model.
Author:
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ISBN:
Category :
Languages : en
Pages : 61
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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.
Author:
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Category :
Languages : en
Pages : 62
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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.
Author: Victor Emanuel Scarpine
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The inclusive differential Drell-Yan cross section is measured from the analysis of $bar{p}ptogammatomusp+musp-X$ events at a center-of-mass energy of $sqrt{s}$ = 1.8 TeV at the Fermilab Tevatron collider. The dimuon events are accepted in the central pseudorapidity region of $-0.6
Author: Donald H. Perkins
Publisher: Cambridge University Press
ISBN: 1139643371
Category : Science
Languages : en
Pages : 454
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Book Description
This highly-regarded text provides a comprehensive introduction to modern particle physics. Extensively rewritten and updated, this 4th edition includes developments in elementary particle physics, as well as its connections with cosmology and astrophysics. As in previous editions, the balance between experiment and theory is continually emphasised. The stress is on the phenomenological approach and basic theoretical concepts rather than rigorous mathematical detail. Short descriptions are given of some of the key experiments in the field, and how they have influenced our thinking. Although most of the material is presented in the context of the Standard Model of quarks and leptons, the shortcomings of this model and new physics beyond its compass (such as supersymmetry, neutrino mass and oscillations, GUTs and superstrings) are also discussed. The text includes many problems and a detailed and annotated further reading list.
Author: D. Bardin
Publisher: Oxford University Press
ISBN: 9780198502807
Category : Science
Languages : en
Pages : 708
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Book Description
The standard model in particle physics unifies the theories of electromagnetic and weak interactions. Much work has been over the last decade, and this book describes some of the leading experimental tests of the model. It is unique in collecting in one volume all of the formulas, recipes, and prescriptions necessary for testing the theory and will be an invaluable tool as experiments move into higher energies. It aims to give a comprehensive exposition of the foundations of the Standard Model and its applications to high energy phenomena.
Author: Cecilia Tosciri
Publisher: Springer Nature
ISBN: 3030879380
Category : Science
Languages : en
Pages : 171
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Book Description
The discovery in 2012 of the Higgs boson at the Large Hadron Collider (LHC) represents a milestone for the Standard Model (SM) of particle physics. Most of the SM Higgs production and decay rates have been measured at the LHC with increased precision. However, despite its experimental success, the SM is known to be only an effective manifestation of a more fundamental description of nature. The scientific research at the LHC is strongly focused on extending the SM by searching, directly or indirectly, for indications of New Physics. The extensive physics program requires increasingly advanced computational and algorithmic techniques. In the last decades, Machine Learning (ML) methods have made a prominent appearance in the field of particle physics, and promise to address many challenges faced by the LHC. This thesis presents the analysis that led to the observation of the SM Higgs boson decay into pairs of bottom quarks. The analysis exploits the production of a Higgs boson associated with a vector boson whose signatures enable efficient triggering and powerful background reduction. The main strategy to maximise the signal sensitivity is based on a multivariate approach. The analysis is performed on a dataset corresponding to a luminosity of 79.8/fb collected by the ATLAS experiment during Run-2 at a centre-of-mass energy of 13 TeV. An excess of events over the expected background is found with an observed (expected) significance of 4.9 (4.3) standard deviation. A combination with results from other \Hbb searches provides an observed (expected) significance of 5.4 (5.5). The corresponding ratio between the signal yield and the SM expectation is 1.01 +- 0.12 (stat.)+ 0.16-0.15(syst.). The 'observation' analysis was further extended to provide a finer interpretation of the V H(H → bb) signal measurement. The cross sections for the VH production times the H → bb branching ratio have been measured in exclusive regions of phase space. These measurements are used to search for possible deviations from the SM with an effective field theory approach, based on anomalous couplings of the Higgs boson. The results of the cross-section measurements, as well as the constraining of the operators that affect the couplings of the Higgs boson to the vector boson and the bottom quarks, have been documented and discussed in this thesis. This thesis also describes a novel technique for the fast simulation of the forward calorimeter response, based on similarity search methods. Such techniques constitute a branch of ML and include clustering and indexing methods that enable quick and efficient searches for vectors similar to each other. The new simulation approach provides optimal results in terms of detector resolution response and reduces the computational requirements of a standard particles simulation.
