Hisano, Junji and Ishiwata, Koji and Nagata, Natsumi and Takesako, Tomohiro (2011) Direct detection of electroweak-interacting dark matter. Journal of High Energy Physics, 2011 (7). Art. No. 005. ISSN 1126-6708 http://resolver.caltech.edu/CaltechAUTHORS:20111007-100722920
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Assuming that the lightest neutral component in an SU(2)_L gauge multiplet is the main ingredient of dark matter in the universe, we calculate the elastic scattering cross section of the dark matter with nucleon, which is an important quantity for the direct detection experiments. When the dark matter is a real scalar or a Majorana fermion which has only electroweak gauge interactions, the scattering with quarks and gluon are induced through one- and two-loop quantum processes, respectively, and both of them give rise to comparable contributions to the elastic scattering cross section. We evaluate all of the contributions at the leading order and find that there is an accidental cancellation among them. As a result, the spin-independent cross section is found to be O(10^(−(46−48))) cm^2, which is far below the current experimental bounds.
|Additional Information:||© 2011 SISSA. Published for SISSA by Springer. Received: April 1, 2011; revised: May 27, 2011; accepted: June 20, 2011; published: July 1, 2011. This work is supported by Grant-in-Aid for Scientific research from the Ministry of Education, Science, Sports, and Culture (MEXT), Japan, No. 20244037, No. 20540252, and No. 22244021 (J.H.), and also by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan. This work was also supported in part by the U.S. Department of Energy under contract No. DE-FG02-92ER40701, and by the Gordon and Betty Moore Foundation (K.I.).|
|Subject Keywords:||Beyond Standard Model; Cosmology of Theories beyond the SM|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||07 Oct 2011 20:33|
|Last Modified:||08 Mar 2013 21:34|
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