BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN
BEGIN:VEVENT
SUMMARY:Dark matter searches at the LHC
DTSTART:20231129T150000Z
DTEND:20231129T170000Z
DTSTAMP:20260801T214408Z
UID:b9516597-c94b-4afe-9f2c-100fca6f6673
SEQUENCE:1
CREATED:20231127T153223Z
DESCRIPTION:The lack of suitable dark matter (DM) particle candidates in t
 he Standard Model of particle physics (SM) hints at the need for a dark se
 ctor to be added to the model. One simplified dark matter model that does 
 this type of extension is the DMsimp model. In this work\, we present a ph
 enomenological study where we successfully perform the reconstruction of t
 he top-anti-top system in the presence of a DM mediator\, Y0\, described b
 y the DMsimp model\, that couples to both the SM particles and the dark se
 ctor. Events involving Y0 production with a top-anti-top pair were generat
 ed for the Large Hadron Collider (LHC) using MadGraph5_aMC@NLO for four di
 fferent mediator masses: 0 GeV\, 1 GeV\, 10 GeV and 125 GeV. The reconstru
 ction of the top-anti-top system is done with a kinematic fit for the dile
 ptonic final states\, without reconstructing the mediator. Lastly\, confid
 ence level exclusion limits are set on the mediator couplings with the top
  quarks for all generated mediator masses using CP angular observables to 
 probe the CP-nature of the couplings.
LAST-MODIFIED:20231127T153223Z
LOCATION:Online
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/dark-matter-searches-at-th
 e-lhc/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="42qw8">The lack of suitabl
 e dark matter (DM) particle candidates in the Standard Model of particle p
 hysics (SM) hints at the need for a dark sector to be added to the model. 
 One simplified dark matter model that does this type of extension is the D
 Msimp model.<br/><br/> In this work\, we present a phenomenological study 
 where we successfully perform the reconstruction of the top-anti-top syste
 m in the presence of a DM mediator\, Y0\, described by the DMsimp model\, 
 that couples to both the SM particles and the dark sector. Events involvin
 g Y0 production with a top-anti-top pair were generated for the Large Hadr
 on Collider (LHC) using MadGraph5_aMC@NLO for four different mediator mass
 es: 0 GeV\, 1 GeV\, 10 GeV and 125 GeV. <br/><br/>The reconstruction of th
 e top-anti-top system is done with a kinematic fit for the dileptonic fina
 l states\, without reconstructing the mediator. Lastly\, confidence level 
 exclusion limits are set on the mediator couplings with the top quarks for
  all generated mediator masses using CP angular observables to probe the C
 P-nature of the couplings.</p>
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END:VCALENDAR