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SUMMARY:Calibration of the photon spectrometer PHOS of the ALICE experimen
 t
DTSTART;VALUE=DATE-TIME:20181024T140000Z
DTEND;VALUE=DATE-TIME:20181024T141500Z
DTSTAMP;VALUE=DATE-TIME:20260308T171827Z
UID:indico-contribution-1135@cern.ch
DESCRIPTION:Speakers: Dmitry Blau  (NRC "Kurchatov Institute")\nThe proced
 ure of the energy calibration of the highly granulated electromagnetic cal
 orimeter PHOS of the ALICE experiment is presented. PHOS consists of 12544
  PbWO4 crystals with Avalanche PhotoDiodes (APD) as photodetectors. It is 
 accompanied by an LED monitoring system and cooling plant which maintains 
 a stable temperature of the crystals at -25$^\\circ$ C.\n\nAfter this late
 st and new calibration procedure was applied to the pp-collision data at $
 \\sqrt s$ = 13 TeV\, we obtained $\\pi^0$ and $\\eta$ peak positions close
  to their PDG mass values over a wide $p_T$ ranges with widths $\\sigma^{\
 \pi^0}_m$ = 4.40 $\\pm$ 0.03 MeV/$c^2$ and $\\sigma^\\eta_m$ = 15.3 $\\pm$
  1.0 MeV/$c^2$\, respectively.\n\nThese methods which were used to perform
  relative gain calibration\, to estimate geometrical alignment and corresp
 onding correction of the absolute energy scale\, to calculate the time-dep
 endent corrections and to evaluate the non-linearity corrections\, will be
  discussed and illustrated by the PHOS performance in proton-proton collis
 ions at $\\sqrt s$ = 13 TeV.\n\nhttps://indico.particle.mephi.ru/event/22/
 contributions/1135/
LOCATION:Hotel Intourist Kolomenskoye 4* Petrovskiy-2 hall
URL:https://indico.particle.mephi.ru/event/22/contributions/1135/
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