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Title: Implications of the 750 GeV γγ Resonance as a Case Study for the International Linear Collider

If the γγ resonance at 750 GeV suggested by 2015 LHC data turns out to be a real effect, what are the implications for the physics case and upgrade path of the International Linear Collider? Whether or not the resonance is confirmed, this question provides an interesting case study testing the robustness of the ILC physics case. In this note, we address this question with two points: (1) Almost all models proposed for the new 750 GeV particle require additional new particles with electroweak couplings. The key elements of the 500 GeV ILC physics program - precision measurements of the Higgs boson, the top quark, and 4-fermion interactions - will powerfully discriminate among these models. This information will be important in conjunction with new LHC data, or alone, if the new particles accompanying the 750 GeV resonance are beyond the mass reach of the LHC. (2) Over a longer term, the energy upgrade of the ILC to 1 TeV already discussed in the ILC TDR will enable experiments in γγ and e+e- collisions to directly produce and study the 750 GeV particle from these unique initial states.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [7] ;  [11] ;  [12] ;  [13] ;  [14] ;  [15] ;  [16] ;  [17] ;  [10] more »;  [12] ;  [18] ;  [19] ;  [20] ;  [21] « less
  1. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA) and Inst. de Fisica d'Altes Energies (IFAE)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Tsinghua Univ., Beijing (China). Center for High Energy Physics
  5. Univ. of Toyama (Japan). Dept. of Physics
  6. Seoul National Univ. (Korea, Republic of). Dept. of Physics and Astronomy
  7. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  8. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe
  9. Cornell Univ., Ithaca, NY (United States). Lab. for Elementary Particle Physics
  10. Univ. Paris-Sud, Orsay (France). Linear Accelerator Lab. (LAL). Centre Scientifique d'Orsay
  11. Max Planck Inst. for Physics (MPP), Munich (Germany)
  12. Univ. of Tokyo (Japan). International Center for Elementary Particle Physics (ICEPP)
  13. Univ. of Texas, Arlington, TX (United States). Dept. of Physics
  14. Univ. of Michigan, Ann Arbor, MI (United States). Michigan Center for Theoretical Physics
  15. Univ. Paris-Sud, Orsay (France). Lab. of Theoretical Physics (LPT)
  16. Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe
  17. Univ. of Tokyo (Japan). Dept. of Physics
  18. Spanish National Research Council (CSIC), Valencia (Spain) and Univ. of Valencia (Spain). Inst. for Corpuscular Physics (IFIC)
  19. Korean Inst. for Advanced Study (KIAS), Seoul (Korea, Republic of ). Quantum Universe Center
  20. Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe; Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  21. Tohoku Univ., Sendai (Japan). Dept. of Physics
Publication Date:
OSTI Identifier:
1263398
Report Number(s):
SLAC-PUB--16751
arXiv:1607.03829; TRN: US1601610
DOE Contract Number:
AC02-76SF00515
Resource Type:
Technical Report
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; INTERNATIONAL LINEAR COLLIDER; GEV RANGE 100-1000; RESONANCE PARTICLES; ELECTRON-POSITRON INTERACTIONS; POSTULATED PARTICLES; PHOTON-PHOTON INTERACTIONS Phenomenology-HEP; HEPPH