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HEP Seminars

25 Apr 2018

UCL HEP Seminars

Seminars are generally held at 4pm on Fridays in room A1 on the top floor of the physics department

A calendar of all seminars in the Physics Department is available on the Physics Events Calendar page.
If you use Google Calendar or similar, such as Apple iCal, it is possible to subscribe to this calendar via: XML, ICAL or HTML.

Please send suggestions for topics and/or speakers to Linda Cremonesi and Andreas Korn.

Upcoming Seminars

27-04-2018 : Michela Massimi (Edinburgh)

Perspectival modeling at LHC

The goal of this paper is to address the philosophical problem of inconsistent models, and the challenge it poses for realism and perspectivism in philosophy of science. I analyse the argument, draw attention to some hidden premises behind it, and deflate them. Then I introduce the notion of “perspectival models” as a distinctive class of modeling practices, whose primary function is heuristic or exploratory. I illustrate perspectival modeling with two examples taken from contemporary high-energy physics at LHC, CERN (one from ATLAS concerning pMSSM-19 and one from the CMS experiment). These examples are designed to show how a plurality of seemingly incompatible models (once suitably understood) is in fact methodologically very important for scientific progress and for advancing knowledge in cutting-edge areas of scientific inquiry.

[slides]

04-05-2018 : Giuliana Galati (Naples)

Final results of the OPERA experiment on tau neutrino appearance in the CNGS beam

The OPERA experiment (Oscillation Project with Emulsion tRacking Apparatus) was designed to conclusively prove the muon neutrino into tau neutrino oscillation in appearance mode. In this talk the improved and final analysis of the full data sample, collected between 2008 and 2012, will be shown. The new analysis is based on a multivariate approach for event identification, fully exploiting the expected features of tau neutrino events, rather than on the sheer selection of candidate events by independent cuts on topological or kinematical parameters as in previous analyses. It is performed on candidate events preselected with looser cuts than those applied in the previous cut-based approach. Looser cuts increase the number of tau neutrino candidates, thus leading to a measurement of the oscillation parameters and of the tau neutrino properties with a reduced statistical uncertainty. For the first time ever, Delta m^2_{23} has been measured in appearance mode, tau neutrino CC cross-section has been measured with a negligible contamination from τ antineutrinos and tau neutrino lepton number has been observed. Moreover, given the higher discrimination power of the multivariate analysis, the significance of the tau neutrino appearance is increased.

[slides]

11-05-2018 : Jim Dobson (UCL)

TBC

TBC

[slides]

18-05-2018 : Anne Norrick (William&Mary)

Minerva DIS

TBC

[slides]