The Resource Search for charginos nearly mass-degenerate with the lightest neutralino : based on a disappearing-track signature in pp collisions at √s = 8 TeV, Shingo Kazama

Search for charginos nearly mass-degenerate with the lightest neutralino : based on a disappearing-track signature in pp collisions at √s = 8 TeV, Shingo Kazama

Label
Search for charginos nearly mass-degenerate with the lightest neutralino : based on a disappearing-track signature in pp collisions at √s = 8 TeV
Title
Search for charginos nearly mass-degenerate with the lightest neutralino
Title remainder
based on a disappearing-track signature in pp collisions at √s = 8 TeV
Statement of responsibility
Shingo Kazama
Creator
Author
Subject
Genre
Language
eng
Summary
In this book, the anomaly mediated supersymmetry breaking (AMSB) model is explored by searching for charged winos with their subsequent decays collected with the ATLAS detector at the Large Hadron Collider (LHC). The author develops a new method, called "re-tracking," to detect charged winos that decay before reaching the Semiconductor Tracker (SCT) detector. Because the nominal tracking algorithm at the ATLAS experiment requires at least seven successive hits in the inner tracking system, the sensitivity to charged winos having a fraction of a nanosecond in the past analysis was therefore limited. However, re-tracking requires a minimum of three pixel hits and provides a fully efficient tracking capability for charged winos traversing the pixel detector, resulting in around about 100 times greater efficiency for charged winos with a lifetime ~0.2 ns longer than that in past searches. Signal topology is characterized by a jet with large transverse momentum (pT), large missing transverse energy, and a high-pT disappearing track. There are three types of background tracks: interacting hadron trac ks, charged leptons, and tracks with mismeasured pT. A background estimation based on the Monte Carlo (MC) simulation suffers from large uncertainties due to poor statistics and has difficulty simulating the properties of background tracks. Therefore, a data-driven approach has been developed by the author of the book to estimate the background track-pT spectrum. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on the AMSB model are obtained. The author shows that in the AMSB model, a charged wino mass below 270 GeV is excluded at 95 % confidence level, which also directly constrains the mass of wino dark matter
Member of
Cataloging source
N$T
http://library.link/vocab/creatorName
Kazama, Shingo
Dewey number
539.7/212
Index
no index present
LC call number
QC793.5.P728
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
Series statement
Springer theses : recognizing outstanding Ph. D. research
http://library.link/vocab/subjectName
  • Proton-proton interactions
  • Particles (Nuclear physics)
  • SCIENCE
  • Particles (Nuclear physics)
  • Proton-proton interactions
Label
Search for charginos nearly mass-degenerate with the lightest neutralino : based on a disappearing-track signature in pp collisions at √s = 8 TeV, Shingo Kazama
Link
https://ezproxy.lib.ou.edu/login?url=http://link.springer.com/10.1007/978-4-431-55657-2
Instantiates
Publication
Copyright
Note
"Doctoral thesis accepted by the University of Tokyo, Tokyo, Japan."
Antecedent source
unknown
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Color
multicolored
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Contents
Introduction -- Theoretical Framework and Motivation -- LHC and ATLAS Detector -- Data and Monte Carlo Simulation -- Object Reconstruction -- Tracking Performance -- Properties of Signal Events -- Event Selection -- Background Estimation -- Systematic Uncertainties -- Extraction of Signal Yield -- Interpretations and Discussion -- Conclusions
Dimensions
unknown
Extent
1 online resource.
File format
unknown
Form of item
online
Isbn
9784431556572
Level of compression
unknown
Media category
computer
Media MARC source
rdamedia
Media type code
c
Note
SpringerLink
Other control number
10.1007/978-4-431-55657-2
Quality assurance targets
not applicable
Reformatting quality
unknown
Sound
unknown sound
Specific material designation
remote
System control number
  • (OCoLC)926705694
  • (OCoLC)ocn926705694
Label
Search for charginos nearly mass-degenerate with the lightest neutralino : based on a disappearing-track signature in pp collisions at √s = 8 TeV, Shingo Kazama
Link
https://ezproxy.lib.ou.edu/login?url=http://link.springer.com/10.1007/978-4-431-55657-2
Publication
Copyright
Note
"Doctoral thesis accepted by the University of Tokyo, Tokyo, Japan."
Antecedent source
unknown
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Color
multicolored
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Contents
Introduction -- Theoretical Framework and Motivation -- LHC and ATLAS Detector -- Data and Monte Carlo Simulation -- Object Reconstruction -- Tracking Performance -- Properties of Signal Events -- Event Selection -- Background Estimation -- Systematic Uncertainties -- Extraction of Signal Yield -- Interpretations and Discussion -- Conclusions
Dimensions
unknown
Extent
1 online resource.
File format
unknown
Form of item
online
Isbn
9784431556572
Level of compression
unknown
Media category
computer
Media MARC source
rdamedia
Media type code
c
Note
SpringerLink
Other control number
10.1007/978-4-431-55657-2
Quality assurance targets
not applicable
Reformatting quality
unknown
Sound
unknown sound
Specific material designation
remote
System control number
  • (OCoLC)926705694
  • (OCoLC)ocn926705694

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