BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Dark Matter Sensitivity of CALET
DTSTART;VALUE=DATE-TIME:20151027T060800Z
DTEND;VALUE=DATE-TIME:20151027T062500Z
DTSTAMP;VALUE=DATE-TIME:20260521T194516Z
UID:indico-contribution-975@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Holger Motz (ICSEP Waseda University)\nCALET (Calori
 metric Electron Telescope)\, launched to the ISS in August\, directly meas
 ures the electron+positron cosmic rays flux up to 20 TeV.\nWith its proton
  rejection capability of 1 : 10^5 and an aperture of 1200 cm^2 sr\, it wil
 l provide good statistics even well above one TeV\, while also featuring a
 n energy resolution of 2%\, which allows it to detect fine structures in t
 he spectrum. Such structures may originate from Dark Matter annihilation o
 r decay\, making indirect Dark Matter search one of CALET's main science o
 bjectives among others\, such as identification of signatures from nearby 
 supernova remnants by observation of TeV electrons\, and measurement of th
 e heavy nuclei spectra to study the cosmic ray acceleration and diffusion 
 mechanism.\nThe positron excess in cosmic rays above 10 GeV was initially 
 proposed by the AMS-02 collaboration to originate from an extra power law 
 source with exponential cut-off\, which emits an equal amount of electrons
  and positrons. The latest results from AMS-02 on positron fraction and to
 tal electron+positron flux can be fitted with a parametrization including 
 such an extra power law source\, which in general may represent nearby ast
 rophysical accelerators or annihilation/decay of Dark Matter. Assuming tha
 t the source is a single pulsar\, this scenario is extrapolated into the T
 eV-region and the expected CALET data for this case simulated. Based on th
 is prediction and taking the shape of the Dark Matter annihilation spectru
 m into account\, the sensitivity of CALET to an additional component from 
 Dark Matter annihilation in the galactic halo has been calculated.\nIt is 
 shown that CALET could significantly improve these limits compared to curr
 ent data\, especially for those Dark Matter candidates that feature a larg
 e fraction of annihilation directly into electron+positron\, such as the L
 KP (Lightest Kaluza-Klein particle).\nThe alternative case of Dark Matter 
 annihilation or decay being the primary cause of the positron excess and t
 he prospects of CALET detecting the corresponding Dark Matter signature ar
 e discussed as well.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contrib
 utions/975/
LOCATION: Room 2
URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/975/
END:VEVENT
END:VCALENDAR