Compact Muon Solenoid Experiment Discovery Potential for Supersymmetry in Same-charge Di-lepton Events
Compact Muon Solenoid Experiment Discovery Potential for Supersymmetry in Same-charge Di-lepton Events

Author: Yuriy Aleksandrovich Pakhotin

Publisher:

Published: 2010

Total Pages:

ISBN-13:

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ABSTRACT: Same-charge di-lepton events provide a very clean experimental signature for Supersymmetry (SUSY) search. This work studies the Compact Muon Solenoid (CMS) experiment search potential for new physics with same-charge, isolated di-leptons accompanied by jets and large missing transverse energy. The results show that CMS sensitivity for new physics at 7 TeV with integrated luminosity 100 pb ... 1 will exceed current Tevatron limits. Muon detection for SUSY discovery in the forward direction is accomplished using cathode strip chambers (CSC). These detectors identify muons, provide a fast muon trigger, and give a precise measurement of the muon trajectory. There are 468 six-plane CSCs in the system. The efficiency of finding muon trigger primitives (muon track segments) was studied using 36 CMS CSCs and cosmic ray muons during the Magnet Test and Cosmic Challenge (MTCC) exercise conducted by the CMS experiment in 2006. The efficiency of finding 2-dimensional trigger primitives within 6-layer chambers was found to be 99.93 ± 0.03%.

Luminosity Measurement at the Compact Muon Solenoid Experiment of the LHC
Luminosity Measurement at the Compact Muon Solenoid Experiment of the LHC

Author: Olena Karacheban

Publisher: Springer

Published: 2018-06-22

Total Pages: 153

ISBN-13: 3319931393

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This book describes the application of a novel technology for beam instrumentation and luminosity measurement and first results on a cutting edge technology potentially to be used after the upgrade of the Large Hadron Collider to higher luminosity. It presents a unique diamond-based luminometer with a detailed performance study. The online bunch-by-bunch luminosity measurements provide an invaluable feedback to the Collider for beam optimisation and for the understanding of beam dynamics. The precision of the luminosity measurement is crucial for all physics analyses. This book highlights the Van der Meer method, which is used for the calibration of the luminometers of the CMS (Compact Muon Solenoid) experiment, and describes the estimate of systematic uncertainties, e.g. due to radiation damage of sensors and electronics and uncertainties of beam parameters. For the future high-luminosity upgrade of the collider, sapphire sensors are investigated in a test beam. It is demonstrated for the first time that sapphire sensors can be used as single particle detectors. A model for the charge transport in sapphire is developed and successfully applied.

Compact Muon Solenoid (CMS).
Compact Muon Solenoid (CMS).

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Provides information about the Compact Muon Solenoid (CMS), a project of the Large Hadron Collider experiments Committee (LHC) of the European Laboratory for Particle Physics (CERN). The CMS will allow detection of a wide range of signatures from alternative electro-weak symmetry breaking mechanisms and will cover important aspects of the heavy ion physics program. Provides information about the organization and institutes of the CMS Collaboration. Offers access to documents, including the letter of intent and the technical proposal. Contains a schedule of meetings and conferences. Links to the home page of CERN.

Search for New Physics in the Compact Muon Solenoid (CMS) Experiment and the Response of the CMS Calorimeters to Particles and Jets
Search for New Physics in the Compact Muon Solenoid (CMS) Experiment and the Response of the CMS Calorimeters to Particles and Jets

Author:

Publisher:

Published: 2008

Total Pages: 113

ISBN-13:

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A Monte Carlo study of a generic search for new resonances beyond the Standard Model (SM) in the CMS experiment is presented. The resonances are axigluon, coloron, E6 diquark, excited quark, W', Z', and the Randall-Sundrum graviton which decay to dijets. The dijet resonance cross section that the CMS can expect to discover at a 5[sigma] significance or to exclude at 95% confidence level for integrated luminosities of 100 pb-1, 1 fb-1, and 10 fb-1 is evaluated. It is shown that a 5[sigma] discovery of a multi-TeV dijet resonance is possible for an axigluon, excited quark, and E6 diquark. However, a 5[sigma] discovery can not be projected with confidence for a W', Z' and the Randall-Sundrum graviton. On the other hand, 95% CL exclusion mass regions can be measured for all resonances at high luminosities. In the second part of this dissertation, the analyses of the 2006 test beam data from the combined electromagnetic and hadronic barrel calorimeters are presented. The CMS barrel calorimeters response to a variety of beam particles in a wide momenta range (1 to 350 GeV/c) is measured. Furthermore, using these beam data, the expected performance of the barrel calorimeters to jets is predicted.

The Compact Muon Solenoid Experiment
The Compact Muon Solenoid Experiment

Author: Jim Pivarski

Publisher:

Published: 2021-05-14

Total Pages: 200

ISBN-13: 9789811206481

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This book presents both the history and scientific background leading to the LHC, the world's collider. The story, as I see it, is an unlikely one without some unexpected developments, we might not have ended up asking the right questions or organized, in the right way, the building of such a large scientific apparatus. Understanding the science is as important as understanding the history, both of which are presented at a level appropriate for an educated layperson or general undergraduate. The historical treatment starts with the discovery of radiation in 1895 and ends with the end of 'naturalness, ' the LHC's most troubling revelation.