Abstract
At colliders massive long-lived charged particles could be revealed through their anomalously large ionisation energy loss dE/dx. In this paper we explore a class of scenarios in which the LLPs are particularly boosted, owing to production from the decay of a heavy parent resonance. Such scenarios give rise to unique signatures as compared to traditionally considered dE/dx new-physics benchmarks. We demonstrate that this class of models, unlike traditional new-physics theories, can explain the recently reported excess of events in the dE/dx search by the ATLAS collaboration without conflicting with the determination of β from ionisation and time-of-flight measurements.
References
C.D. Anderson and S.H. Neddermeyer, Cloud Chamber Observations of Cosmic Rays at 4300 Meters Elevation and Near Sea-Level, Phys. Rev. 50 (1936) 263 [INSPIRE].
S.H. Neddermeyer and C.D. Anderson, Note on the Nature of Cosmic Ray Particles, Phys. Rev. 51 (1937) 884 [INSPIRE].
M. Fairbairn, A.C. Kraan, D.A. Milstead, T. Sjöstrand, P.Z. Skands and T. Sloan, Stable Massive Particles at Colliders, Phys. Rept. 438 (2007) 1 [hep-ph/0611040] [INSPIRE].
CMS collaboration, Search for Heavy Stable Charged Particles in pp collisions at \( \sqrt{s} \) = 7 TeV, JHEP 03 (2011) 024 [arXiv:1101.1645] [INSPIRE].
ATLAS collaboration, Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC, Phys. Lett. B 701 (2011) 1 [arXiv:1103.1984] [INSPIRE].
ATLAS collaboration, Searches for heavy long-lived sleptons and R-Hadrons with the ATLAS detector in pp collisions at \( \sqrt{s} \) = 7 TeV, Phys. Lett. B 720 (2013) 277 [arXiv:1211.1597] [INSPIRE].
CMS collaboration, Search for heavy long-lived charged particles in pp collisions at \( \sqrt{s} \) = 7 TeV, Phys. Lett. B 713 (2012) 408 [arXiv:1205.0272] [INSPIRE].
ATLAS collaboration, Search for long-lived, multi-charged particles in pp collisions at \( \sqrt{s} \) = 7 TeV using the ATLAS detector, Phys. Lett. B 722 (2013) 305 [arXiv:1301.5272] [INSPIRE].
CMS collaboration, Searches for Long-Lived Charged Particles in pp Collisions at \( \sqrt{s} \) = 7 and 8 TeV, JHEP 07 (2013) 122 [arXiv:1305.0491] [INSPIRE].
ATLAS collaboration, Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at \( \sqrt{s} \) = 8 TeV using the ATLAS experiment, Eur. Phys. J. C 75 (2015) 407 [arXiv:1506.05332] [INSPIRE].
ATLAS collaboration, Search for metastable heavy charged particles with large ionization energy loss in pp collisions at \( \sqrt{s} \) = 13 TeV using the ATLAS experiment, Phys. Rev. D 93 (2016) 112015 [arXiv:1604.04520] [INSPIRE].
CMS collaboration, Search for long-lived charged particles in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Phys. Rev. D 94 (2016) 112004 [arXiv:1609.08382] [INSPIRE].
Particle Data Group collaboration, Review of Particle Physics, PTEP 2020 (2020) 083C01 [INSPIRE].
ATLAS collaboration, Search for heavy, long-lived, charged particles with large ionisation energy loss in pp collisions at \( \sqrt{s} \) = 13 TeV using the ATLAS experiment and the full Run 2 dataset, arXiv:2205.06013 [INSPIRE].
ATLAS collaboration, Ismet Siral, Presentation in Search for heavy, long-lived, charged particles with large ionisation energy loss in pp collisions at \( \sqrt{s} \) = 13 TeV using the ATLAS experiment and the full Run 2 dataset, La Thuile Italy, March 6–12 2022 [https://agenda.infn.it/event/28365/contributions/161449/attachments/89009/119418/LeThuile-dEdx.pdf].
ATLAS collaboration, Performance and operation experience of the ATLAS Semiconductor Tracker, Int. J. Mod. Phys. Conf. Ser. 31 (2014) 1460295 [arXiv:1402.6506] [INSPIRE].
N.C. Benekos, R. Clifft, M. Elsing and A. Poppleton, ATLAS Inner Detector Performance, ATL-INDET-2004-002, ATL-COM-INDET-2003-023, CERN, Geneva, Switzerland (2003) [INSPIRE].
A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [arXiv:0901.0002] [INSPIRE].
CMS collaboration, Search for high mass dijet resonances with a new background prediction method in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, JHEP 05 (2020) 033 [arXiv:1911.03947] [INSPIRE].
C.W. Bauer, Z. Ligeti, M. Schmaltz, J. Thaler and D.G.E. Walker, Supermodels for early LHC, Phys. Lett. B 690 (2010) 280 [arXiv:0909.5213] [INSPIRE].
CMS collaboration, Search for resonant and nonresonant new phenomena in high-mass dilepton final states at \( \sqrt{s} \) = 13 TeV, JHEP 07 (2021) 208 [arXiv:2103.02708] [INSPIRE].
CDF collaboration, High-precision measurement of the W boson mass with the CDF II detector, Science 376 (2022) 170 [INSPIRE].
A. Strumia, Interpreting electroweak precision data including the W-mass CDF anomaly, arXiv:2204.04191 [INSPIRE].
ATLAS collaboration, Search for heavy long-lived multi-charged particles in the full Run-II pp collision data at \( \sqrt{s} \) = 13 TeV using the ATLAS detector, ATLAS-CONF-2022-034, CERN, Geneva, Switzerland (2022) [INSPIRE].
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Giudice, G.F., McCullough, M. & Teresi, D. dE/dx from boosted long-lived particles. J. High Energ. Phys. 2022, 12 (2022). https://doi.org/10.1007/JHEP08(2022)012
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DOI: https://doi.org/10.1007/JHEP08(2022)012
Keywords
- Other Weak Scale BSM Models
- Specific BSM Phenomenology