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

Abstract

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:
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)
OSTI Identifier:
1263398
Report Number(s):
SLAC-PUB-16751
arXiv:1607.03829; TRN: US1601610
DOE Contract Number:
AC02-76SF00515
Resource Type:
Technical Report
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

Citation Formats

Fujii, Keisuke, Grojean, Christophe, Peskin, Michael E., Barklow, Tim, Gao, Yuanning, Kanemura, Shinya, Kim, Hyungdo, List, Jenny, Nojiri, Mihoko, Perelstein, Maxim, Poschl, Roman, Reuter, Jurgen, Simon, Frank, Tanabe, Tomohiko, Yu, Jaehoon, Wells, James D., Falkowski, Adam, Matsumoto, Shigeki, Moroi, Takeo, Richard, Francois, Tian, Junping, Vos, Marcel, Yokoya, Hiroshi, Murayama, Hitoshi, and Yamamoto, Hitoshi. Implications of the 750 GeV γγ Resonance as a Case Study for the International Linear Collider. United States: N. p., 2016. Web. doi:10.2172/1263398.
Fujii, Keisuke, Grojean, Christophe, Peskin, Michael E., Barklow, Tim, Gao, Yuanning, Kanemura, Shinya, Kim, Hyungdo, List, Jenny, Nojiri, Mihoko, Perelstein, Maxim, Poschl, Roman, Reuter, Jurgen, Simon, Frank, Tanabe, Tomohiko, Yu, Jaehoon, Wells, James D., Falkowski, Adam, Matsumoto, Shigeki, Moroi, Takeo, Richard, Francois, Tian, Junping, Vos, Marcel, Yokoya, Hiroshi, Murayama, Hitoshi, & Yamamoto, Hitoshi. Implications of the 750 GeV γγ Resonance as a Case Study for the International Linear Collider. United States. doi:10.2172/1263398.
Fujii, Keisuke, Grojean, Christophe, Peskin, Michael E., Barklow, Tim, Gao, Yuanning, Kanemura, Shinya, Kim, Hyungdo, List, Jenny, Nojiri, Mihoko, Perelstein, Maxim, Poschl, Roman, Reuter, Jurgen, Simon, Frank, Tanabe, Tomohiko, Yu, Jaehoon, Wells, James D., Falkowski, Adam, Matsumoto, Shigeki, Moroi, Takeo, Richard, Francois, Tian, Junping, Vos, Marcel, Yokoya, Hiroshi, Murayama, Hitoshi, and Yamamoto, Hitoshi. Thu . "Implications of the 750 GeV γγ Resonance as a Case Study for the International Linear Collider". United States. doi:10.2172/1263398. https://www.osti.gov/servlets/purl/1263398.
@article{osti_1263398,
title = {Implications of the 750 GeV γγ Resonance as a Case Study for the International Linear Collider},
author = {Fujii, Keisuke and Grojean, Christophe and Peskin, Michael E. and Barklow, Tim and Gao, Yuanning and Kanemura, Shinya and Kim, Hyungdo and List, Jenny and Nojiri, Mihoko and Perelstein, Maxim and Poschl, Roman and Reuter, Jurgen and Simon, Frank and Tanabe, Tomohiko and Yu, Jaehoon and Wells, James D. and Falkowski, Adam and Matsumoto, Shigeki and Moroi, Takeo and Richard, Francois and Tian, Junping and Vos, Marcel and Yokoya, Hiroshi and Murayama, Hitoshi and Yamamoto, Hitoshi},
abstractNote = {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.},
doi = {10.2172/1263398},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 14 00:00:00 EDT 2016},
month = {Thu Jul 14 00:00:00 EDT 2016}
}

Technical Report:

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  • We summarize the physics case for the International Linear Collider (ILC). We review the key motivations for the ILC presented in the literature, updating the projected measurement uncertainties for the ILC experiments in accord with the expected schedule of operation of the accelerator and the results of the most recent simulation studies.
  • There are now several proposals that have been put forward from around the world for an e{sup +}e{sup {minus}} linear collider with an initial center of mass energy of 500 GeV. In this paper, the authors discuss why a project of this type deserves priority as the next, major initiative in high energy physics.
  • Several proposals are being developed around the world for an e{sup +}e{sub {minus}} linear collider with an initial center of mass energy of 500 GeV. In this paper, the authors discuss why a project of this type deserves priority as the next major initiative in high energy physics.
  • Several proposals are being developed around the world for an e+e- linear collider with an initial center of mass energy of 500 GeV. In this paper, we will discuss why a project of this type deserves priority as the next major initiative in high energy physics.
  • The design of a very high intensity proton linear accelerator and its associated facilities, that together form a complete meson factory is discussed. The accelerator will deliver a 1 ma (average) primary proton beam at an energy that is variable from 200 to 750 Mev. Polarized protons can also be accelerated. The intense primary proton beam, that can be fully extracted from the accelerator, will produce intense well-defined secondary beams of pions, muons, neutrons, and neutrinos. These secondary beams will be separated from the proton beam and transported to various experimental areas where adequate shielding, both flexible and fixed, ismore » provided. The sections of the report outline the justification, establish the feasibility, and estimate the cost of the installation. Tentative characteristics of the accelerator and the beams are presented, as are a number of studies that can be made with the assembly. 72 references. (auth)« less