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Collider probes of real triplet scalar dark matter

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [4];  [5]
  1. National Taiwan Univ., Taipei (Taiwan); Academia Sinica, Taipei (Taiwan); National Center for Theoretical Sciences, Taipei (Taiwan)
  2. Universidad Adolfo Ibáñez, Santiago (Chile); Universidad Católica de Chile, Santiago (Chile)
  3. Univ. of Massachusetts, Amherst, MA (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Shanghai Jiao Tong Univ. (China); Univ. of Massachusetts, Amherst, MA (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States)
We study discovery prospects for a real triplet extension of the Standard Model scalar sector at the Large Hadron Collider (LHC) and a possible future 100 TeV $$\mathcal{pp}$$ collider. We focus on the scenario in which the neutral triplet scalar is stable and contributes to the dark matter relic density. When produced in $$\mathcal{pp}$$ collisions, the charged triplet scalar decays to the neutral component plus a soft pion or soft lepton pair, yielding a disappearing charged track in the detector. We recast current 13 TeV LHC searches for disappearing tracks, and find that the LHC presently excludes a real triplet scalar lighter than 248 (275) GeV, for a mass splitting of 172 (160) MeV with $$\mathcal{L}$$ = 36 fb–1. The reach can extend to 497 (520) GeV with the collection of 3000 fb–1. We extrapolate the 13 TeV analysis to a prospective 100 TeV pp collider, and find that a ~ 3 TeV triplet scalar could be discoverable with $$\mathcal{L}$$ = 30 ab–1, depending on the degree to which pile up effects are under control. We also investigate the dark matter candidate in our model and corresponding present and prospective constraints from dark matter direct detection. We find that currently XENON1T can exclude a real triplet dark matter lighter than ~ 3 TeV for a Higgs portal coupling of order one or larger, and the future XENON20T will cover almost the entire dark matter viable parameter space except for vanishingly small portal coupling.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Fund for Scientific and Technological Development (FONDECYT); National Natural Science Foundation of China (NSFC); Taiwan Ministry of Science and Technology (MOST); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001; SC0011095
OSTI ID:
1768546
Report Number(s):
LA-UR--20-22358
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 1 Vol. 2021; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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