CERN Accelerating science

Posters

Ultimi arrivi:
2020-07-22
17:05
Making a Splash - proton–proton collisions EN
Making a Splash - collisions proton-proton EN

Reference: Poster-2020-1040
Keywords:  opendays2019  ATLAS  making a splash  collisions  education  outreach
Created: 2019. -1 p
Creator(s): Russell, Heather; Mehlhase, Sascha; Anthony, Katarina

Making a Splash - proton–proton collisionsMaking a Splash - collisions proton-proton

© CERN Geneva

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2020-07-22
17:04
Making a Splash - proton–proton collisions EN/FR
Making a Splash - collisions proton-proton EN/FR

Reference: Poster-2020-1039
Keywords:  opendays2019  ATLAS  making a splash  collisions  education  outreach
Created: 2019. -1 p
Creator(s): Russell, Heather; Mehlhase, Sascha; Anthony, Katarina

Making a Splash - proton–proton collisionsMaking a Splash - collisions proton-proton

© CERN Geneva

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2020-07-22
17:04
Making a Splash - experiments EN
Making a Splash - expériences EN

Reference: Poster-2020-1038
Keywords:  opendays2019  ATLAS  making a splash  collisions  education  outreach
Created: 2019. -1 p
Creator(s): Russell, Heather; Mehlhase, Sascha; Anthony, Katarina

Making a Splash - experimentsMaking a Splash - expériences

© CERN Geneva

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2020-07-22
17:04
Making a Splash - experiments EN/FR
Making a Splash - expériences EN/FR

Reference: Poster-2020-1037
Keywords:  opendays2019  ATLAS  making a splash  collisions  education  outreach
Created: 2019. -1 p
Creator(s): Russell, Heather; Mehlhase, Sascha; Anthony, Katarina

Making a Splash - experimentsMaking a Splash - expériences

© CERN Geneva

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2020-07-22
17:03
Making a Splash - Experimental Balloon Physics EN
Making a Splash - la physique expérimentale des ballons EN

Reference: Poster-2020-1036
Keywords:  opendays2019  ATLAS  making a splash  collisions  education  outreach
Created: 2019. -1 p
Creator(s): Russell, Heather; Mehlhase, Sascha; Anthony, Katarina

Making a Splash - Experimental Balloon PhysicsMaking a Splash - la physique expérimentale des ballons

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2020-07-22
17:01
Making a Splash - Experimental Balloon Physics EN/FR
Making a Splash - la physique expérimentale des ballons EN/FR

Reference: Poster-2020-1035
Keywords:  opendays2019  ATLAS  making a splash  collisions  education  outreach
Created: 2019. -1 p
Creator(s): Russell, Heather; Mehlhase, Sascha; Anthony, Katarina

Making a Splash - Experimental Balloon PhysicsMaking a Splash - la physique expérimentale des ballons

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2020-06-05
16:18
LHCb - Open Heavy-Flavour and $J/\psi$ production in peripheral PbPb collisions at LHCb
Reference: Poster-2020-1034
Created: 2020. -1 p
Creator(s): Belin, Samuel

In 2018, LHCb recorded ~210 microbarn$^{-1}$ integrated luminosity of PbPb collisions at $\sqrt(s_{NN})$ = 5.02 TeV. Although limited to peripheral hadronic collisions, this new dataset offers unique opportunities to study simultaneously open and close heavy flavor production, at forward rapidity down to zero pT, at the LHC. Moreover, with an increase of the luminosity by a factor 20 compared to the previous 2015 PbPb dataset, precise measurements on photo-produced charmonia in ultra-peripheral collisions are foreseen. All these measurements are sensitive to and would help to constrain the small-x parton distribution functions (nPDFs) in the target nucleus. Finally, the great momentum resolution of the detector allows to study photo-produced $J/\psi$ in collisions with a nuclear overlap. This new type of prob is sensitive to the geometry of the collisions but also to the electromagnetic field of the Pb nuclei. In this talk, we present the latest results on heavy flavor productions obtained by LHCb measurements in peripheral and ultra-peripheral PbPb collisions. Prospectives on this first results are also discussed.

Related links:
Conference - 10th edition of the Hard and Electromagnetic Probes
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2020-02-25
16:16
Lepton universality tests with Rare Decays at LHCb
Reference: Poster-2020-1033
Created: 2020. -1 p
Creator(s): Moise, Razvan-Daniel

Recent measurements of b-hadron decays involving leptons are in tension with the Standard Model (SM). Each of these so-called flavour anomalies diverge by up to 3 standard deviations from their SM predictions. There are various new physics scenarios (e.g. leptoquarks) which can explain the anomalies in a coherent fashion. Although some tensions could be due to theory uncertainties, certain observables are immune to such ambiguities. Such is the case for branching fraction ratios R(H) = B(Xb→H𝜇+𝜇-)/B(Xb→He+e-), where Xb is a beauty hadron, and H is a hadronic system. This poster presents the latest LHCb results on the ratios R(K) [PRL 122 (2019) 191801], R(K*0) [JHEP 08 (2017) 055], and R(pK) [arXiv:1912.08139].

Related links:
LHCb poster
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2020-02-25
15:31
Prospects for using sub-nanosecond time information to improve the LHCb RICH performance
Reference: Poster-2020-1032
Created: 2020. -1 p
Creator(s): Keizer, Floris

The increase in luminosity during the LHC upgrade programme causes a rise in particle multiplicity and hit occupancy in the LHCb detector. To mitigate this effect for the Ring-Imaging Cherenkov (RICH) detectors, it is proposed to use the photon detector hit time information. The excellent intrinsic time resolution of the RICH detectors of less than 10 ps was demonstrated in the LHCb simulation framework. The FPGA in the RICH detector readout chain includes a programmable time gate of 3 to 6 ns, which will be fine-tuned with the first data in 2021. This nanosecond time gate within the 25 ns readout is unprecedented in the LHC and will reduce background. During Upgrade Ib, the electronic readout chain can be modified or replaced in order to achieve a time resolution around 300 ps. For the high-luminosity environment during LHC Run 5, a further improvement in time resolution to approximately 50 to 100 ps is foreseen. The clear trend of improving particle ID performance with time resolution is presented in this poster.

Related links:
LHCb poster
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2020-02-24
11:37
Flavour Tagging at the LHCb Experiment
Reference: Poster-2020-1031
Created: 2020. -1 p
Creator(s): Fuhring, Quentin

Decay-time-dependent measurements of $B$ mesons require knowledge of the initial $B$ flavour. At LHCb an ensemble of various Flavour Tagging algorithms is used to determine the initial $B$ flavour. The higher luminosity in LHC Run 3 will be challenging for the LHCb Flavour Tagging and is expected to show an impact on the Flavour Tagging performance. As an alternative to the existing ensemble of Flavour Tagging algorithms an inclusive Flavour Tagging algorithm is under development. This inclusive tagger uses a recurrent neural network to estimate the initial $B$ flavour by evaluating all tracks of an event.

Related links:
LHCb poster
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