Next Seminars


Nov 23, 2020
Thésards 3ème année: Gaia Verna & Etienne Fortin
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Start:
Monday, November 23, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, November 23, 2020 at 4:00:00 PM Central European Standard Time
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Nov 30, 2020
Thèse Dawid Gerstel: "Test of Lepton Flavour Universality using B0 to D* tau nu decays at LHCb"
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Description :

This thesis presents the measurements of the R(D*) = BF(B0->D*tau nu) / BF(B0->D*mu nu)
ratio with the 2015-2016 LHCb dataset using 3-prong tau decays.
The study comprises a test of the Lepton Flavour Universality in b->c l nu decays to help resolve the tension between the Standard Model R(D*)
estimation and the experimental results from the B-factories and LHCb.
The analysis builds upon a previous LHCb measurement ( 10.1103/PhysRevD.97.072013 and 10.1103/PhysRevLett.120.171802) with a new dataset and improved techniques.
Most importantly, a novel fast simulation technique, ReDecay, is used to generate large simulated samples and
Multivariate Analysis techniques are exploited in signal selection.
Since the analysis has yet to undergo an internal LHCb review, and several systematic uncertainties must be computed, the R(D*) value is blinded.
Nonetheless, nearly complete documentation of the analysis is presented in this thesis.

Start:
Monday, November 30, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, November 30, 2020 at 4:00:00 PM Central European Standard Time
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Dec 7, 2020
Thésards 3ème année: Ngoc Khanh Vu & Jacopo Cerasoli
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Start:
Monday, December 7, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, December 7, 2020 at 4:00:00 PM Central European Standard Time
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Dec 14, 2020
HDR
Damien Dornic (CPPM)
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Start:
Monday, December 14, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, December 14, 2020 at 4:00:00 PM Central European Standard Time
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5 last Seminars


Nov 16, 2020
Thésards 3ème année: Sylvain Gouyou Beauchamps & Carlo Guidi
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Description :

This CPPM seminar is part of our series of talks from the CPPM 3rd year PhD students.
It will be happening remotely on zoom:

https://cern.zoom.us/j/98884149890?pwd=ZGVSNlE5RlJNUVk5MUgvVXhBdU9Gdz09

Meeting ID: 988 8414 9890

Passcode: 758510

By phone: Find your local number: https://cern.zoom.us/u/ad6uXVcoCT

Start:
Monday, November 16, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, November 16, 2020 at 4:00:00 PM Central European Standard Time
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Nov 9, 2020
Thésards 3ème année: Romain Paviot & Qiufan Lin
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Description :

This CPPM seminar is part of our series of talks from the CPPM 3rd year PhD students.
It will be happening remotely on zoom:

Lien zoom: https://univ-amu-fr.zoom.us/j/96100395873?pwd=SnFGUmRObGFEYTJhblNja0pLV0lMZz09
ID de réunion : 961 0039 5873
Code: CPPM

Ou par téléphone: 
Trouvez votre numéro local : https://univ-amu-fr.zoom.us/u/aRLypGmva
ID de réunion : 961 0039 5873
Code secret : 896013
Start:
Monday, November 9, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, November 9, 2020 at 4:00:00 PM Central European Standard Time
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Nov 2, 2020
IPHU seminar: A physicist's view on pandemic dynamics
Giacomo Cacciapaglia (IP2I Lyon)
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Description :

Pandemics, like COVID-19, are becoming a recurring threat to our global society. Surprisingly, high energy physics can help us understand how the dynamics of the virus spreading works. The epidemic Renormalisation Group approach provides simple models, which can be used to predict incurring waves of infections, as demonstrated for the second wave in Europe. Finally, models
with strolling dynamics can shed light on how infection waves arise, and help us prevent them. 

 

Note that the talk has been recorded and is available in the link below

Start:
Monday, November 2, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, November 2, 2020 at 3:00:00 PM Central European Standard Time
Location:
zoom
Indico page:
Oct 26, 2020
Journal Club: Search for phenomena beyond the Standard Model in events with largeb-jet multiplicity using the ATLAS detector at the LHC
Lorenzo Feligioni (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))
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Description :

Informal journal club meeting about the following paper:

Search for phenomena beyond the Standard Model in events with largeb-jet multiplicity using the ATLAS detector at the LHC

A search is presented for new phenomena in events characterised by high jet multiplicity, no leptons (electrons or muons), and four or more jets originating from the fragmentation of b-quarks (b-jets). The search uses 139 fb1 of s = 13 TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider during Run 2. The dominant Standard Model background originates from multijet production and is estimated using a data-driven technique based on an extrapolation from events with low b-jet multiplicity to the high b-jet multiplicities used in the search. No significant excess over the Standard Model expectation is observed and 95% confidence-level limits that constrain simplified models of R-parity-violating supersymmetry are determined. The exclusion limits reach 950 GeV in top-squark mass in the models considered.

Start:
Monday, October 26, 2020 at 2:00:00 PM Central European Standard Time
End:
Monday, October 26, 2020 at 4:00:00 PM Central European Standard Time
Location:
Zoom
Indico page:
Oct 19, 2020
Evidence for four-top-quark production at the LHC with the ATLAS detector
Simon Berlendis (University of Arizona)
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Description :

Due to the special role of the top quark in many beyond-standard models, the study of the different top-quark production modes is an important area of research to find evidence for new physics at the LHC. Recently, the ATLAS collaboration claimed a strong evidence for the production of four top quarks with a measured cross section that is twice the standard-model prediction. In this seminar, I will present the sophisticated techniques that were used to overcome the analysis challenge for such a rare and complicated process. The robustness of the result and its compatibility with the standard-model prediction will also be discussed.

 

 

Lien zoom: https://univ-amu-fr.zoom.us/j/96100395873?pwd=SnFGUmRObGFEYTJhblNja0pLV0lMZz09
ID de réunion : 961 0039 5873
Code: CPPM

Ou par téléphone: 
Trouvez votre numéro local : https://univ-amu-fr.zoom.us/u/aRLypGmva
ID de réunion : 961 0039 5873
Code secret : 896013

 

Start:
Monday, October 19, 2020 at 2:00:00 PM Central European Summer Time
End:
Monday, October 19, 2020 at 4:00:00 PM Central European Summer Time
Location:
Zoom
Indico page: