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Search for a Light Higgs Boson and Low Mass Dark Matter at the Belle Experiment.

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Title:Search for a Light Higgs Boson and Low Mass Dark Matter at the Belle Experiment.
Authors:Seong, Ilsoo
Contributors:Physics (department)
Date Issued:Aug 2017
Publisher:University of Hawaiʻi at Mānoa
Abstract:We report a search for a light CP-odd Higgs boson A0, which can
be produced in U decays and decay to low mass dark matter, c. We
search for evidence of the on-shell process, U(1S) ! gA0,A0 ! cc,
and the off-shell process, U(1S) ! gcc, via the dipion transition
U(2S) ! U(1S)p+p􀀀. We present the first Belle search for final
states with a single photon and missing energy in the mass range
of MA0 < 9.0 GeV/c2 and Mc < 4.5 GeV/c2 with a data sample
of 157.3 106 U(2S) decays. We find no evidence for a signal
and set limits on branching fractions for such processes. We also
use the limit on the off-shell process to set competitive limits on
WIMP-nucleon scattering cross sections.
Description:Ph.D. Thesis. University of Hawaiʻi at Mānoa 2017.
URI:http://hdl.handle.net/10125/62678
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: Ph.D. - Physics


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