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SUMMARY:Statistical problems in Astronomy and High Energy Physics - Bodhi 
 Sen\, University of Cambridge
DTSTART:20111102T163000Z
DTEND:20111102T173000Z
UID:TALK34483@talks.cam.ac.uk
CONTACT:Richard Samworth
DESCRIPTION:In this talk I will consider two applications\, one in Astrono
 my\nand the other in High Energy Physics\, and illustrate how statistical\
 nprocedures can be used to answer the important scientific questions. The\
 ntalk will also briefly discuss some of the major statistical challenges i
 n\nthese two fields.\n\nWhether a dwarf spheroidal galaxy is in equilibriu
 m or being tidally\ndisrupted by the Milky Way is an important question fo
 r the study of its\ndark matter content and distribution. This question is
  investigated using\nobservations from the dwarf spheroidal Leo I. For Leo
  I\, tidal disruption is\ndetected\, at least for stars sufficiently far f
 rom the centre\, but the\neffect appears to be quite modest.\n\nNext\, I w
 ill introduce the current picture of Particle Physics and its\ngoals. I wi
 ll briefly describe some of the common statistical problems in\nHEP and th
 en specialise to the problem of constructing confidence intervals\nin pres
 ence of nuisance parameters. The Feldman and Cousins unified method\n(1998
 ) has received much attention in the physics literature. We review and\ndi
 scuss an extension of this method and provide a few examples. The Hybrid r
 esampling method will also be discussed with interesting applications\, if
 \ntime permits.\n
LOCATION:MR4\, CMS
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