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Exposing the dead cone effect with jet substructure techniques

Author(s)
Maltoni, Fabio; Selvaggi, Michele; Thaler, Jesse
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DownloadPhysRevD.94.054015.pdf (10.29Mb)
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Abstract
The dead cone is a well-known effect in gauge theories, where radiation from a charged particle of mass m and energy E is suppressed within an angular size of m/E. This effect is universal as it does not depend on the spin of the particle nor on the nature of the gauge interaction. It is challenging to directly measure the dead cone at colliders, however, since the region of suppressed radiation either is too small to be resolved or is filled by the decay products of the massive particle. In this paper, we propose to use jet substructure techniques to expose the dead cone effect in the strong-force radiation pattern around boosted top quarks at the Large Hadron Collider. Our study shows that with 300/fb of 13–14 TeV collision data, ATLAS and CMS could obtain the first direct evidence of the dead cone effect and test its basic features.
Date issued
2016-09
URI
http://hdl.handle.net/1721.1/105195
Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review D
Publisher
American Physical Society
Citation
Maltoni, Fabio, Michele Selvaggi, and Jesse Thaler. “Exposing the Dead Cone Effect with Jet Substructure Techniques.” Physical Review D 94.5 (2016): n. pag. © 2016 American Physical Society
Version: Final published version
ISSN
2470-0010
2470-0029

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