Measurements of Differential Cross Sections for Associated Production of a W Boson and Jets in Proton-proton Collisions at $\sqrt{s}$

Measurements of Differential Cross Sections for Associated Production of a W Boson and Jets in Proton-proton Collisions at $\sqrt{s}$
Author :
Publisher :
Total Pages :
Release :
ISBN-10 : OCLC:967921120
ISBN-13 :
Rating : 4/5 (20 Downloads)

Synopsis Measurements of Differential Cross Sections for Associated Production of a W Boson and Jets in Proton-proton Collisions at $\sqrt{s}$ by :

Differential cross sections for a W boson produced in association with jets are measured in a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6 inverse femtobarns. The W bosons are identified through their decay mode W to mu nu. The cross sections are reported as functions of jet multiplicity, transverse momenta, and the scalar sum of jet transverse momenta (HT) for different jet multiplicities. Distributions of the angular correlations between the jets and the muon are examined, as well as the average number of jets as a function of HT and as a function of angular variables. The measured differential cross sections are compared with tree-level and higher-order recent event generators, as well as next-to-leading-order and next-to-next-to-leading-order theoretical predictions. The agreement of the generators with the measurements builds confidence in their use for the simulation of W+jets background processes in searches for new physics at the LHC.

Differential Cross Section Measurements for the Production of a W Boson in Association with Jets in Proton-proton Collisions at $\sqrt S

Differential Cross Section Measurements for the Production of a W Boson in Association with Jets in Proton-proton Collisions at $\sqrt S
Author :
Publisher :
Total Pages : 26
Release :
ISBN-10 : OCLC:940485872
ISBN-13 :
Rating : 4/5 (72 Downloads)

Synopsis Differential Cross Section Measurements for the Production of a W Boson in Association with Jets in Proton-proton Collisions at $\sqrt S by :

Our measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse momenta (pT) and pseudorapidities of the four leading jets, the scalar sum of jet transverse momenta (HT), and the difference in azimuthal angle between the directions of each jet and the muon. Furthermore, the data sample of pp collisions at a centre-of-mass energy of 7 TeV was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0 fb-1. The measured cross sections are compared to predictions from Monte Carlo generators, MADGRAPH + PYTHIAand SHERPA, and to next-to-leading-order calculations from BLACKHAT + SHERPA. The differential cross sections are found to be in agreement with the predictions, apart from the pT distributions of the leading jets at high pT values, the distributions of the HT at high-HT and low jet multiplicity, and the distribution of the difference in azimuthal angle between the leading jet and the muon at low values.

The Black Book of Quantum Chromodynamics

The Black Book of Quantum Chromodynamics
Author :
Publisher : Oxford University Press
Total Pages : 760
Release :
ISBN-10 : 9780199652747
ISBN-13 : 0199652740
Rating : 4/5 (47 Downloads)

Synopsis The Black Book of Quantum Chromodynamics by : John Campbell

This title provides an in-depth introduction to the particle physics of current and future experiments at particle accelerators. The text provides the reader with an overview of practically all aspects of the strong interaction necessary to understand and appreciate modern particle phenomenology at the energy frontier.

Differential Cross Section Measurements for the Production of a W Boson in Association with Jets in Proton{u2013}proton Collisions at {u221A}s

Differential Cross Section Measurements for the Production of a W Boson in Association with Jets in Proton{u2013}proton Collisions at {u221A}s
Author :
Publisher :
Total Pages : 26
Release :
ISBN-10 : OCLC:1066380562
ISBN-13 :
Rating : 4/5 (62 Downloads)

Synopsis Differential Cross Section Measurements for the Production of a W Boson in Association with Jets in Proton{u2013}proton Collisions at {u221A}s by :

Our measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse momenta (pT) and pseudorapidities of the four leading jets, the scalar sum of jet transverse momenta (HT), and the difference in azimuthal angle between the directions of each jet and the muon. Furthermore, the data sample of pp collisions at a centre-of-mass energy of 7 TeV was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0 fb-1. The measured cross sections are compared to predictions from Monte Carlo generators, MADGRAPH + PYTHIAand SHERPA, and to next-to-leading-order calculations from BLACKHAT + SHERPA. The differential cross sections are found to be in agreement with the predictions, apart from the pT distributions of the leading jets at high pT values, the distributions of the HT at high-HT and low jet multiplicity, and the distribution of the difference in azimuthal angle between the leading jet and the muon at low values.

Measurements of the W Production Cross Sections in Association with Jets with the ATLAS Detector

Measurements of the W Production Cross Sections in Association with Jets with the ATLAS Detector
Author :
Publisher :
Total Pages :
Release :
ISBN-10 : OCLC:930077807
ISBN-13 :
Rating : 4/5 (07 Downloads)

Synopsis Measurements of the W Production Cross Sections in Association with Jets with the ATLAS Detector by :

This paper presents cross sections for the production of a W boson in association with jets, measured in proton-proton collisions at \(\sqrt{s} = 7\) TeV with the ATLAS experiment at the large hadron collider. With an integrated luminosity of 4.6fb-1, this data set allows for an exploration of a large kinematic range, including jet production up to a transverse momentum of 1TeV and multiplicities up to seven associated jets. The production cross sections for W bosons are measured in both the electron and muon decay channels. Differential cross sections for many observables are also presented including measurements of the jet observables such as the rapidities and the transverse momenta as well as measurements of event observables such as the scalar sums of the transverse momenta of the jets. As a result, the measurements are compared to numerous QCD predictions including next-to-leading-order perturbative calculations, resummation calculations and Monte Carlo generators.

Search for New Heavy Charged Bosons and Measurement of High-Mass Drell-Yan Production in Proton—Proton Collisions

Search for New Heavy Charged Bosons and Measurement of High-Mass Drell-Yan Production in Proton—Proton Collisions
Author :
Publisher : Springer
Total Pages : 386
Release :
ISBN-10 : 9783030006501
ISBN-13 : 3030006506
Rating : 4/5 (01 Downloads)

Synopsis Search for New Heavy Charged Bosons and Measurement of High-Mass Drell-Yan Production in Proton—Proton Collisions by : Markus Zinser

This book presents two analyses, the first of which involves the search for a new heavy charged gauge boson, a so-called W' boson. This new gauge boson is predicted by some theories extending the Standard Model gauge group to solve some of its conceptual problems. Decays of the W' boson in final states with a lepton (l± = e± , μ±) and the corresponding (anti-)neutrino are considered. Data collected by the ATLAS experiment in 2015 at a center of mass energy of √s =13 TeV is used for the analysis. In turn, the second analysis presents a measurement of the double-differential cross section of the process pp->Z/gamma^* + X -> l^+l^- + X, including a gamma gamma induced contribution, at a center of mass energy of sqrt{s} = 8 TeV. The measurement is performed in an invariant mass region of 116 GeV to 1500 GeV as a function of invariant mass and absolute rapidity of the l^+l^-- pair, and as a function of invariant mass and pseudorapidity separation of the l^+l^-- pair. The data analyzed was recorded by the ATLAS experiment in 2012 and corresponds to an integrated luminosity of 20.3/fb. It is expected that the measured cross sections are sensitive to the PDFs at very high values of the Bjorken-x scaling variable, and to the photon structure of the proton.

Inclusive b Jet Production in Proton-Proton Collisions

Inclusive b Jet Production in Proton-Proton Collisions
Author :
Publisher : Springer Nature
Total Pages : 325
Release :
ISBN-10 : 9783030343835
ISBN-13 : 3030343839
Rating : 4/5 (35 Downloads)

Synopsis Inclusive b Jet Production in Proton-Proton Collisions by : Patrick L.S. Connor

^ 74 GeV and |y| 2.4; the b jets must contain a B hadron. The measurement has significant statistics up to p T ∼ O(TeV). Advanced methods of unfolding are performed to extract the signal. It is found that fixed-order calculations with underlying event describe the measurement well.

Measurements of Jet Multiplicity and Differential Production Cross Sections of Z + Jets Events in Proton-proton Collisions at {u221A}s

Measurements of Jet Multiplicity and Differential Production Cross Sections of Z + Jets Events in Proton-proton Collisions at {u221A}s
Author :
Publisher :
Total Pages :
Release :
ISBN-10 : OCLC:1066510003
ISBN-13 :
Rating : 4/5 (03 Downloads)

Synopsis Measurements of Jet Multiplicity and Differential Production Cross Sections of Z + Jets Events in Proton-proton Collisions at {u221A}s by :

Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at √s = 7 TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 inverse femtobarns. The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD.

Measurement of Differential Production Cross-sections for a Z Boson in Association with B-jets in 7 TeV Proton-proton Collisions with the ATLAS Detector

Measurement of Differential Production Cross-sections for a Z Boson in Association with B-jets in 7 TeV Proton-proton Collisions with the ATLAS Detector
Author :
Publisher :
Total Pages :
Release :
ISBN-10 : OCLC:951621563
ISBN-13 :
Rating : 4/5 (63 Downloads)

Synopsis Measurement of Differential Production Cross-sections for a Z Boson in Association with B-jets in 7 TeV Proton-proton Collisions with the ATLAS Detector by :

We report measurements of differential production cross-sections of a Z boson in association with b-jets in pp collisions at √ s = 7 TeV. The data analysed correspond to an integrated luminosity of 4.6 fb-1 recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a Z boson decaying into an electron or muon pair, and containing b-jets. For events with at least one b-jet, the cross-section is presented as a function of the Z boson transverse momentum and rapidity, together with the inclusive b-jet cross-section as a function of b-jet transverse momentum, rapidity and angular separations between the b-jet and the Z boson. For events with at least two b-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum b-jets, and as a function of the Z boson transverse momentum and rapidity. Lastly, results are compared to leading-order and next-to-leading-order perturbative QCD calculations.