Supersymmetric Phenomenology & Rare Signals in Colliders PDF Download

Author: Humberto B. Gilmer
Publisher:
ISBN:
Category : Colliders (Nuclear physics)
Languages : en
Pages : 0

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Author: Marc Christopher Thomas
Publisher: Springer
ISBN: 3319434527
Category : Science
Languages : en
Pages : 113

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Book Description
This thesis studies collider phenomenology of physics beyond the Standard Model at the Large Hadron Collider (LHC). It also explores in detail advanced topics related to Higgs boson and supersymmetry – one of the most exciting and well-motivated streams in particle physics. In particular, it finds a very large enhancement of multiple Higgs boson production in vector-boson scattering when Higgs couplings to gauge bosons differ from those predicted by the Standard Model. The thesis demonstrates that due to the loss of unitarity, the very large enhancement for triple Higgs boson production takes place. This is a truly novel finding. The thesis also studies the effects of supersymmetric partners of top and bottom quarks on the Higgs production and decay at the LHC, pointing for the first time to non-universal alterations for two main production processes of the Higgs boson at the LHC–vector boson fusion and gluon–gluon fusion. Continuing the exploration of Higgs boson and supersymmetry at the LHC, the thesis extends existing experimental analysis and shows that for a single decay channel the mass of the top quark superpartner below 175 GeV can be completely excluded, which in turn excludes electroweak baryogenesis in the Minimal Supersymmetric Model. This is a major new finding for the HEP community. This thesis is very clearly written and the introduction and conclusions are accessible to a wide spectrum of readers.

Author: Sophie Williamson
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
It has long been thought that the Standard Model (SM) is an incomplete description of our universe, yet experimental results thus far do not confirm anything beyond it. Minimal supersymmetry, embodied by the minimal supersymmetric standard model (MSSM), is a competitive extension of the SM and has been well investigated, especially in the context of simplified models, at colliders. However, current search techniques may not be making optimal use of the collider's ability to test the accessible parameter space. Instead of using a static veto on jet momentum to minimise undesirable background processes in signal searches, it can be shown that employing a dynamic jet veto constructed out of several measures of hadronic and leptonic activity can heighten the discovery potential of simplified MSSM scans. At the same time, it cannot be denied that the limits placed on simplified models are not a true representation of more complex scenarios - especially non-minimal supersymmetry models where decay signatures are altered by a more complex chargino and neutralino spectrum. Dirac gauginos (DG) are a well-motivated non-minimal extension that restore the naturalness being lost by the ever more stringent constraints on the MSSM. Here this work looks down two avenues: it (1) investigates how the enlarged particle content of DG models can lead to altered bounds on current gluino and squark mass limits from Run 2 of the LHC, and (2) makes an in depth study of the Higgs sector in such models, which is automatically aligned owing to extended supersymmetry that links the Yukawa couplings to the gauge couplings in the electroweak sector.

Author: Herbi K. Dreiner
Publisher: Cambridge University Press
ISBN: 1009347535
Category : Science
Languages : en
Pages : 1031

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Book Description
Supersymmetry is an extension of the successful Standard Model of particle physics; it relies on the principle that fermions and bosons are related by a symmetry, leading to an elegant predictive structure for quantum field theory. This textbook provides a comprehensive and pedagogical introduction to supersymmetry and spinor techniques in quantum field theory. By utilising the two-component spinor formalism for fermions, the authors provide many examples of practical calculations relevant for collider physics signatures, anomalies, and radiative corrections. They present in detail the component field and superspace formulations of supersymmetry and explore related concepts, including the theory of extended Higgs sectors, models of grand unification, and the origin of neutrino masses. Numerous exercises are provided at the end of each chapter. Aimed at graduate students and researchers, this volume provides a clear and unified treatment of theoretical concepts that are at the frontiers of high energy particle physics.

Author:
Publisher: Cambridge University Press
ISBN: 0521800889
Category :
Languages : en
Pages : 1030

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Author: David J. Muller
Publisher:
ISBN:
Category :
Languages : en
Pages : 196

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Author: Graham Douglas Kribs
Publisher:
ISBN:
Category :
Languages : en
Pages : 542

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Author: Ahmed Ismail
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
This work investigates signatures of supersymmetry through the phenomenological Minimal Supersymmetric Standard Model (pMSSM), considering the collider and astrophysical implications that minimal supersymmetry may have. We scan over the 19-dimensional parameter space of the pMSSM, considering both the neutralino and gravitino as candidates for the lightest supersymmetric particle. We explore the sensitivity of the Large Hadron Collider to large sets of pMSSM models, and additionally consider the impact that current and future dark matter direct detection, indirect detection, and neutrino telescope experiments would have in constraining the pMSSM.

Author: Marco Valente
Publisher: Springer
ISBN: 9783030940492
Category : Science
Languages : en
Pages : 0

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Book Description
After an extensive overview of the Standard Model and of the theory and phenomenology of Supersymmetry, this book describes the recent development of the ATLAS Particle Flow algorithm, a hadronic reconstruction technique aiming at enhancing the sensitivity of the experiment to new physics through the combination of the information from different ATLAS sub-detectors. The first ever ATLAS strong SUSY search exploiting this technique is also described, reporting the results and exclusion limits obtained using the complete proton-proton collision dataset recorded by the ATLAS experiment during the second Run of the Large Hadron Collider (LHC).

Author: Eugenio Nappi
Publisher: World Scientific
ISBN: 981448332X
Category : Science
Languages : en
Pages : 471

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Book Description
The possible upgrade of LHC or a future generation of colliders at the extreme limits of energy and luminosity will require detectors based on very advanced technological solutions to fully exploit the physics opportunities offered. Major steps must be taken to design and realize devices that are able not only to handle very high rates but also to cope with the very harsh radiation environment without suffering any performance degradation.This book reviews the present status, current limits and recent developments in detection techniques and related aspects (simulation, signal acquisition, tracking, particle identification, etc.). Novel ideas in this domain are discussed with emphasis on the directions in which improvements in proven techniques are desired.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings)• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)• CC Proceedings — Engineering & Physical Sciences