Partikeldagarna 2017 (Stockholm)

Session

Tuesday morning session 1

7 Nov 2017, 08:45

DeGeersalen (Geovetenskapens hus)

287. Uppsala ATLAS Activities

Dr Pedro Henrique Sales de Bruin (Uppsala University)

07/11/2017, 08:45

An overview of the structure, activities and responsibilities of the ATLAS group at Uppsala University is presented. The topics covered range from hardware and software upgrades for the LHC and ATLAS, performance improvements, and searches in Standard Model and Beyond Standard Model physics.

290. A search for Higgs boson pair production in the bbττ channel with the ATLAS experiment

Mr Petar Bokan (Uppsala University, Department of Physics and Astronomy)

07/11/2017, 09:00

The discovery of the Higgs boson by the ATLAS and CMS experiments in 2012 provided important insight into the mechanism of electroweak symmetry breaking. In the Standard Model (SM), a pair of Higgs bosons can be produced via top quark loops, or the Higgs boson self- coupling. Apart from SM production modes, several beyond the Standard Model (BSM) hypotheses predict heavy narrow width...

291. Search for doubly-charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at √s=13 TeV

Katja Mankinen (Lund University)

07/11/2017, 09:15

A search for doubly-charged Higgs bosons with pairs of prompt, isolated, high-pT leptons with same-sign charge is presented. The search uses the pp collision data sample corresponding to 36.1 fb-1 of integrated luminosity collected in 2015 and 2016 by the ATLAS detector at the LHC with a centre-of-mass energy of 13 TeV. No significant evidence of signal is observed and corresponding limits...

301. When the NMSSM Meets the LHC: Conventional Higgs Searches and the Power of Mono-Higgs

Sebastian Baum (Stockholm Universitet)

07/11/2017, 09:30

The Next-to-Minimal Supersymmetric Standard Model (NMSSM) augments the MSSM particle content with an additional singlet superfield. The 125 GeV Standard Model-like Higgs and naturalness generically prefer regions of NMSSM parameter space featuring a light Higgs and neutralino spectrum as well as large couplings between the Higgs doublets and the NMSSM singlet. The additional states and...

309. Composite Higgs and timid composite pseudo-scalars

Mr Hugo Serodio (Lund University)

07/11/2017, 09:45

In this talk I will review some topics of composite Higgs models. These can successfully address the origin of the Higgs boson, as a pseudo-Goldstone of a spontaneously broken global symmetry, and flavour physics via the partial compositeness mechanism. Models which contain a Higgs and top partners at the same time can also contain additional light scalars in the composite spectrum. Such...

318. Minimal U(1)-theories, anomalies & collider phenomenology

Mr Johan Löfgren (Uppsala University)

07/11/2017, 10:00

A neutral and massive vector boson, often called Z', is a common feature of many beyond standard model scenarios. The simplest such models extend the electroweak sector of the SM with an extra U(1)-group, spontaneously broken at some higher scale. In such extensions it is important to ensure that this classical symmetry is not violated by quantum effects - so called anomalies. In a theory...