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Particle Physics in the LHC Era$
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Giles Barr, Robin Devenish, Roman Walczak, and Tony Weidberg

Print publication date: 2016

Print ISBN-13: 9780198748557

Published to Oxford Scholarship Online: March 2016

DOI: 10.1093/acprof:oso/9780198748557.001.0001

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(p.356) 13 LHC and BSM
Particle Physics in the LHC Era

G. Barr

R. Devenish

R. Walczak

T. Weidberg

Oxford University Press

This chapter starts with a review of the Standard Model (SM) cross sections at LHC energies. The resulting challenges for LHC physics are discussed with an emphasis on the trigger systems required. A brief review is given of some of the many SM measurements at the LHC. The fundamental problems with the SM, particularly the hierarchy problem, are explained. Supersymmetry (SUSY) is explained as a natural solution to the hierarchy problem. R-parity is introduced to explain the absence of rapid proton decay. R-parity-conserving SUSY naturally provides a dark matter candidate. Some of the experimental searches for SUSY particles are described. The astrophysical evidence for dark matter is considered. Complementary methods for searching for dark matter using the LHC, underground experiments, and satellites are described. Finally, the cosmological evidence for dark energy is considered and the resulting difficulties with the small value of the cosmological constant are described.

Keywords:   LHC, Standard Model, hierarchy problem, supersymmetry, dark matter, dark energy

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