scholarly journals Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
◽  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Z Boson ◽  
Center Of Mass ◽  
Z Bosons ◽  
Differential Cross Sections ◽  
Pp Collisions ◽  
Center Of Mass Energy ◽  
Cms Experiment ◽  
Theoretical Predictions

Abstract Measurements of the differential cross sections of Z + jets and γ + jets production, and their ratio, are presented as a function of the boson transverse momentum. Measurements are also presented of the angular distribution between the Z boson and the closest jet. The analysis is based on pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1 recorded by the CMS experiment at the LHC. The results, corrected for detector effects, are compared with various theoretical predictions. In general, the predictions at higher orders in perturbation theory show better agreement with the measurements. This work provides the first measurement of the ratio of the differential cross sections of Z + jets and γ + jets production at 13 TeV, as well as the first direct measurement of Z bosons emitted collinearly with a jet.

scholarly journals The CMS monitoring infrastructure and applications

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Christian Ariza-Porras ◽  
Valentin Kuznetsov ◽  
Federica Legger
Keyword(s):  
Distributed Computing ◽  
Compact Muon Solenoid ◽  
Hadron Collider ◽  
Efficient Operation ◽  
Workload Management ◽  
Future Developments ◽  
Cms Experiment ◽  
Data Transfers ◽  
Monitoring Architecture ◽  
Globally Distributed

AbstractThe globally distributed computing infrastructure required to cope with the multi-petabyte datasets produced by the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) at CERN comprises several subsystems, such as workload management, data management, data transfers, and submission of users’ and centrally managed production requests. To guarantee the efficient operation of the whole infrastructure, CMS monitors all subsystems according to their performance and status. Moreover, we track key metrics to evaluate and study the system performance over time. The CMS monitoring architecture allows both real-time and historical monitoring of a variety of data sources. It relies on scalable and open source solutions tailored to satisfy the experiment’s monitoring needs. We present the monitoring data flow and software architecture for the CMS distributed computing applications. We discuss the challenges, components, current achievements, and future developments of the CMS monitoring infrastructure.

Design and test of pixel sensors for the CMS experiment

2001 ◽  
Vol 461 (1-3) ◽  
pp. 182-184 ◽  
Author(s):  
G. Bolla ◽  
D. Bortoletto ◽  
C. Rott ◽  
A. Roy ◽  
S. Kwan ◽  
...  
Keyword(s):  
Cms Experiment ◽  
Pixel Sensors

scholarly journals Studies on the upgrade of the muon system in the forward region of the CMS experiment at LHC with GEMs

2014 ◽  
Vol 9 (01) ◽  
pp. C01053-C01053 ◽  
Author(s):  
D Abbaneo ◽  
M Abbrescia ◽  
M Abi Akl ◽  
C Armaingaud ◽  
P Aspell ◽  
...  
Keyword(s):  
Forward Region ◽  
Muon System ◽  
Cms Experiment

New CSC segment builder algorithm with Monte-Carlo TeV muons in CMS experiment

2017 ◽  
Vol 48 (5) ◽  
pp. 786-788 ◽  
Author(s):  
V. Palichik ◽  
N. Voytishin
Keyword(s):  
Monte Carlo ◽  
Cms Experiment
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