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# Particle physics at accelerators in the United States and Asia

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An Author Correction to this article was published on 21 April 2020

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## Abstract

Particle physics experiments in the United States and Asia have greatly contributed to the understanding of elementary particles and their interactions. With the recent discovery of the Higgs boson at CERN, interest in the development of next-generation colliders has been rekindled. A linear electron–positron collider in Japan and a circular collider in China have been proposed for precision studies of the Higgs boson. In addition to the Higgs programme, new accelerator-based long-baseline neutrino mega-facilities are being built in the United States and Japan. Here, we outline the present status of key particle physics programmes at accelerators, and future plans in the United States and Asia that largely complement approaches being explored in the European Strategy for Particle Physics Update. We encourage the pursuit of this global approach, reaching beyond regional boundaries for optimized development and operations of major accelerator facilities worldwide, to ensure an active and productive future of the field.

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## References

1. ATLAS Collaboration. Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC. Phys. Lett. B 716, 1–29 (2012).

2. CMS Collaboration. Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC. Phys. Lett. B 716, 30–61 (2012).

3. ATLAS Collaboration. Combined measurements of Higgs boson production and decay using up to 80 fb−1 of proton-proton collision data at √s = 13 TeV collected with the ATLAS experiment. Phys. Rev. D 101, 012002 (2020).

4. CMS Collaboration. Combined measurements of Higgs boson couplings in proton-proton collisions at √s=13 TeV. Eur. Phys. J. C 79, 421 (2019).

5. Cepeda, M. et al. Higgs physics at the HL-LHC and HE-LHC. Preprint at https://arxiv.org/abs/1902.00134 (2019).

6. Behnke, T. et al. The International Linear Collider technical design report - volume 1: executive summary. Preprint at https://arxiv.org/abs/1306.6327 (2013).

7. Evans, L. & Michizono, S. The International Linear Collider machine staging report 2017. Preprint at https://arxiv.org/abs/1711.00568 (2017).

8. Michizono, S. The International Linear Collider. Nat. Rev. Phys. 1, 244–245 (2019).

9. CLIC and CLICdp collaborations. Updated Baseline for a Staged Compact Linear Collider (CERN, 2016); https://doi.org/10.5170/CERN-2016-004

10. Benedikt, M. & Zimmerman, F. The physics and technology of the Future Circular Collider. Nat. Rev. Phys. 1, 238–240 (2019).

11. CEPC Study Group. CEPC conceptual design report: volume 1 — accelerator. Preprint at https://arxiv.org/abs/1809.00285 (2018).

12. Danby, G. et al. Observation of high-energy neutrino reactions and the existence of two kinds of neutrinos. Phys. Rev. Lett. 9, 36–44 (1962).

13. Bloom, E. D. et al. High Energy inelastic e-p scattering at 6° and 10°. Phys. Rev. Lett. 23, 930–934 (1969).

14. Breidenbach, M. et al. Observed behavior of highly inelastic electron–proton scattering. Phys. Rev. Lett. 23, 935–939 (1969).

15. Augustin, J.-E. et al. Discovery of a narrow resonance in e+e annihilation. Phys. Rev. Lett. 33, 1406–1408 (1974).

16. Aubert, J. J. et al. Experimental Observation of a Heavy Particle J. Phys. Rev. Lett. 33, 1404–1406 (1974).

17. Perl, M. L. et al. Evidence for anomalous lepton production in e+e annihilation. Phys. Rev. Lett. 35, 1489–1492 (1975).

18. Perl, M. L. Evidence for, and properties of, the new charged heavy lepton. In Thanh Van, T. (ed.). Proc. XII Rencontres de Moriond. 75–97 (1977).

19. Herb, S. W. et al. Observation of a dimuon resonance at 9.5 GeV in 400-GeV proton-nucleus collisions. Phys. Rev. Lett. 39, 252–255 (1977).

20. CDF Collaboration.Observation of top quark production in $$\bar{p}p$$ collisions with the Collider Detector at Fermilab. Phys. Rev. Lett. 74, 2626–2631 (1995).

21. D0 Collaboration. Observation of the top quark. Phys. Rev. Lett. 74, 2632–2637 (1995).

22. DONUT Collaboration. Observation of tau neutrino interactions. Phys. Lett. B. 504, 218–224 (2000).

23. Luo, Q. & Xu, D. Progress on preliminary conceptual study of HIEPA, a super tau-charm factory in China. In Proc. 9th International Particle Accelerator Conference 422–424 (2018).

24. Albrecht, J. et al. Future Prospects for exploring present day anomalies in flavor physics measurements with Belle II and LHCb. Preprint at https://arxiv.org/abs/1709.10308 (2018).

25. Super-Kamiokande Collaboration. Evidence for Oscillation of Atmospheric Neutrinos. Phys. Rev. Lett. 81, 1562–1567 (1998).

26. Ahmad, Q. R. et al. Direct evidence for neutrino flavor transformation from neutral-current interactions in the Sudbury Neutrino Observatory. Phys. Rev. Lett. 89, 011301 (2002).

27. Daya Bay Collaboration. New measurement of θ13 via neutron capture on hydrogen at Daya Bay. Phys. Rev. D 93, 072011 (2016).

28. Pac, M. Y. Recent Results from RENO. Preprint at https://arxiv.org/abs/1801.04049 (2018).

29. Holzbauer, J. L. The Muon g-2 Experiment Overview and Status. Preprint at https://arxiv.org/abs/1712.05980 (2017).

30. Muon g-2 Collaboration. Final Report of the E821 muon anomalous magnetic moment measurement at BNL. Phys. Rev. D. 73, 072003 (2006).

31. Yuan, C.-Z. The XYZ states revisited. Int. J. Mod. Phys. A 33, 1830018 (2018).

32. DUNE Collaboration. The DUNE far detector interim design report volume 1: physics, technology & strategies. Preprint at https://arxiv.org/abs/1807.10334 (2018).

33. Bambade, P. et al. The International Linear Collider: a global project. Preprint at https://arxiv.org/abs/1903.01629v2 (2019).

34. Bhat, P. C. & Taylor, G. N. Report of the International Committee for Future Accelerators. In Proc. 39th Int. Conference on High Energy Physics https://doi.org/10.22323/1.340.0711 (2018).

35. Bhat, P. C. & Rubinstein, R. The International Committee for Future Accelerators (ICFA): history and the future. Rev. Accel. Sci. Technol. 10, 311–320 (2019).

36. KEK International Working Group. Recommendations on ILC Project Implementation (KEK, 2019); https://www2.kek.jp/ilc/en/docs/Recommendations_on_ILC_Project_Implementation.pdf

37. Grassellino, A. et al. Unprecedented quality factors at accelerating gradients up to 45 MVm–1 in niobium superconducting resonators via low temperature nitrogen infusion. Supercond. Sci. Technol. 30, 094004 (2017).

38. Grassellino, A. et al. Accelerating fields up to 49 MV/m in TESLA-shape superconducting RF niobium cavities via 75C vacuum bake. Preprint at https://arxiv.org/abs/1806.09824 (2018).

39. Delahaye, J. P. et al. Muon Colliders. Preprint at https://arxiv.org/abs/1901.06150v1 (2019).

40. MICE Collaboration. Demonstration of cooling by the Muon Ionization Cooling Experiment. Nature 578, 53–59 (2020).

41. Alesini, D. et al. Positron driven muon source for a muon collider. Preprint at https://arxiv.org/abs/1905.05747v2 (2019).

42. Neuffer, D. & Shiltsev, V. On the feasibility of a pulsed 14 TeV muon collider in the LHC tunnel. J. Instrum. 13, T10003 (2018).

43. Esarey, E., Schroeder, C. B. & Leemans, W. P. Physics of laser-driven plasma-based electron accelerators. Rev. Mod. Phys. 81, 1229–1285 (2009).

44. Joshi, C. Review of beam driven plasma wakefield accelerators. AIP Conf. Proc. 737, 3–10 (2004).

45. England, R. et al. Dielectric laser accelerators. Rev. Mod. Phys. 86, 1337–1389 (2014).

46. Gonsalves, A. J. et al. Petwatt laser guiding and electron beam acceleration to 8 gev in a laser-heated capillary discharge waveguide. Phys. Rev. Lett. 122, 084801 (2019).

47. Adli, E. et al. Acceleration of electrons in the plasma wakefield of a proton bunch. Nature 561, 363–367 (2018).

48. Cros, B. & Muggli, P. ALLEGRO input for the 2020 update of the European Strategy for Particle Physics: comprehensive overview. Preprint at https://arxiv.org/abs/1901.08436v2 (2019).

49. European Strategy for Particle Physics Preparatory Group. Physics briefing book. Preprint at https://arxiv.org/abs/1910.11775 (2019).

50. HEPAP Subcommittee Collaboration. Building for Discovery: Strategic Plan for U.S. Particle Physics in the Global Context (2014); http://inspirehep.net/record/1299183/files/FINAL_P5_Report_053014.pdf.

51. Bernstein, R. H. et al. (eds) Planning the Future of U.S. Particle Physics: Report of the 2013 Community Summer Study of the APS Division of Particles and Fields (2013); https://www.slac.stanford.edu/econf/C1307292/docs/SnowmassBook.pdf.

52. Ishitsuka, M. et al. Final Report of the Committee on Future Projects in High Energy Physics, (JAHEP, 2017); http://www.jahep.org/files/20170906-en.pdf

53. ICFA Statement on the ILC Project (The International Committee for Future Accelerators, 2020); https://icfa.fnal.gov/wp-content/uploads/ICFA_Statement_22Feb2020.pdf

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## Acknowledgements

P.C.B. is supported by Fermi National Accelerator Laboratory (FNAL/Fermilab), which is managed by Fermi Research Alliance, LLC (FRA), under the contract number DE-AC02-07CH11359 with the US Department of Energy. G.N.T. is supported by the Australian Research Council and the University of Melbourne.

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Correspondence to Pushpalatha C. Bhat.

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Bhat, P.C., Taylor, G.N. Particle physics at accelerators in the United States and Asia. Nat. Phys. 16, 380–385 (2020). https://doi.org/10.1038/s41567-020-0863-3

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