ELFT HÍRADÓ

[Ferenc Siklér <sikler.ferenc AT wigner.hu>]

Kedves kollégák,

 Meghívunk minden érdeklődőt a Wigner FK Nagyenergiás Fizikai Osztályának jövő
hétfői szemináriumára, december 12., hétfő 10:00-ra.

 Részletek itt, absztrakt alább:
 https://indico.wigner.hu/event/1449/

 [Az előadás a zoom-on keresztül is követhető, csatlakozási infók a fenti
leírásban.]

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Precision luminosity measurement at the CMS experiment in Run 2 and prospects 
for HL-LHC

by Attila Rádl (Eötvös U and Wigner RCP, Budapest)

Precision luminosity measurements are an essential ingredient to cross section 
measurements at the LHC and its high-luminosity upgrade (HL-LHC), needed to 
determine fundamental parameters of the standard model and to constrain or 
discover beyond-the-standard-model phenomena. The luminosity measurement of the 
CMS detector at the LHC, using proton-proton collisions at 13 TeV during the 
2015–2018 data-taking period, is reported. The absolute luminosity scale is 
obtained with beam-separation scans, and several systematic uncertainty sources 
are studied, including additional contributions from the linearity and 
stability of the detectors. Meanwhile, the HL-LHC is foreseen to reach an 
instantaneous luminosity a factor of five to seven times the nominal LHC design 
value. The resulting, unprecedented requirements for luminosity and background 
monitoring measurements are presented, tackled by upgraded or new 
high-precision radiation-hard instrumentation at CMS. The exploitation of the 
tracker endcap pixel detector, the outer tracker, the hadron forward 
calorimeter, the barrel muon detectors and the 40 MHz scouting system is 
discussed together with the concept of a standalone luminosity and beam-induced 
background monitor using Si-pad sensors.
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Üdvözlettel,
 Siklér Ferenc