1.

Record Nr.

UNINA9910254591103321

Autore

Cheng Yangyang

Titolo

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS / / by Yangyang Cheng

Pubbl/distr/stampa

Cham : , : Springer International Publishing : , : Imprint : Springer, , 2017

ISBN

3-319-44218-X

Edizione

[1st ed. 2017.]

Descrizione fisica

1 online resource (XV, 176 p. 67 illus., 63 illus. in color.)

Collana

Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5053

Disciplina

539.73

Soggetti

Particle acceleration

Cosmology

Particles (Nuclear physics)

Quantum field theory

Particle Acceleration and Detection, Beam Physics

Elementary Particles, Quantum Field Theory

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Nota di bibliografia

Includes bibliographical references at the end of each chapters.

Nota di contenuto

Introduction -- The Standard Model and Beyond -- An Overview of Dark Matter -- The ATLAS Experiment at the Large Hadron Collider -- Dark Matter Searches at ATLAS -- Dark Matter + Higgs(→bb): Overview -- Dark Matter + Higgs(→bb): Z - 2HDM Simplified Model -- Dark Matter + Higgs(→bb): Physics Objects -- Dark Matter + Higgs(→bb): Event Selection -- Dark Matter + Higgs(→bb): Background Processes -- Dark Matter + Higgs(→bb): Systematic Uncertainties -- Dark Matter + Higgs(→bb): Results -- Conclusion -- References. .

Sommario/riassunto

This thesis reports on the search for dark matter in data taken with the ATLAS detector at CERN’s Large Hadron Collider (LHC). The identification of dark matter and the determination of its properties are among the highest priorities in elementary particle physics and cosmology. The most likely candidate, a weakly interacting massive particle, could be produced in the high energy proton-proton collisions at the LHC. The analysis presented here is unique in looking for dark matter produced together with a Higgs boson that decays into its



dominant decay mode, a pair of b quarks. If dark matter were seen in this mode, we would learn directly about the production mechanism because of the presence of the Higgs boson. This thesis develops the search technique and presents the most stringent production limit to date.