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Title: Enhancing Long-Lived Particles Searches at the LHC with Precision Timing Information

Journal Article · · Physical Review Letters
 [1];  [2];  [1]
  1. Univ. of Chicago, Chicago, IL (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Maryland, College Park, MD (United States)
+ Show Author Affiliations

We explore the physics potential of using precision timing information at the LHC in searches for long-lived particles (LLPs). In comparison with the light standard model particles, the decay products of massive LLPs arrive at detectors with time delays around the nanosecond scale. We propose new strategies to take advantage of this time delay feature by using initial state radiation to time stamp the collision event and require at least one LLP to decay within the detector. This search strategy is effective for a broad range of models. In addition to outlining this general approach, we demonstrate its effectiveness with the projected reach for two benchmark scenarios: a Higgs boson decaying into a pair of LLPs, and pair production of long-lived neutralinos in the gauge mediated supersymmetry breaking models. Our strategy increases the sensitivity to the lifetime of the LLP by two orders of magnitude or more and particularly exhibits a better behavior with a linear dependence on the lifetime in the large lifetime region compared to traditional LLP searches. Furthermore the timing information significantly reduces the standard model background and provides a powerful new dimension for LLP searches.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1457538
Report Number(s):
arXiv:1805.05957; FERMILAB-PUB-18-173-T; EFI-18-7; PRLTAO; 1673386
Journal Information:
Physical Review Letters, Vol. 122, Issue 13; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 55 works
Citation information provided by
Web of Science

References (42)

Searches for long-lived charged particles in pp collisions at $ \sqrt{s} $ =7 and 8 TeV journal July 2013
Search for heavy, long-lived neutralinos that decay to photons at CDF II using photon timing journal August 2008
Signature-based search for delayed photons in exclusive photon plus missing transverse energy events from p p ¯ collisions with s = 1.96     TeV journal August 2013
Spying an invisible Higgs boson journal February 2015
CMS hardware track trigger: New opportunities for long-lived particle searches at the HL-LHC journal August 2017
Test for the Existence of Effectively Stable Neutral Heavy Leptons journal June 1978
Search for metastable heavy charged particles with large ionization energy loss in p p collisions at s = 13     TeV using the ATLAS experiment journal June 2016
Novel signature for long-lived particles at the LHC journal December 2018
Data-driven model-independent searches for long-lived particles at the LHC journal December 2016
Jet energy measurement with the ATLAS detector in proton-proton collisions at $\sqrt{\mathrm{s}}=7\ \mathrm{TeV}$ journal March 2013
Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at √ s =13 TeV journal June 2018
Macroscopic strings and ``quirks'' at colliders journal November 2009
Beam test measurements of Low Gain Avalanche Detector single pads and arrays for the ATLAS High Granularity Timing Detector journal June 2018
A brief introduction to PYTHIA 8.1 journal June 2008
Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV p p collisions at the LHC using the ATLAS detector journal December 2014
The fate of long-lived superparticles with hadronic decays after LHC Run 1 journal June 2015
Naturalness in the dark at the LHC journal July 2015
Measurement of the Inelastic Proton-Proton Cross Section at s = 13     TeV with the ATLAS Detector at the LHC journal October 2016
Gaugino production in proton-proton collisions at a center-of-mass energy of 8 TeV journal October 2012
Simulating spin- $\frac{3}{2}$ particles at colliders journal October 2013
Displaced vertices from pseudo-Dirac dark matter journal November 2017
Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at s = 8     TeV journal January 2015
Gravitino Dark Matter scenarios with massive metastable charged sparticles at the LHC journal October 2006
Parton fragmentation and string dynamics journal July 1983
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations journal July 2014
R-Parity-violating supersymmetry journal November 2005
Folded supersymmetry and the LEP paradox journal February 2007
Search for long-lived, weakly interacting particles that decay to displaced hadronic jets in proton-proton collisions at s = 8     TeV with the ATLAS detector journal July 2015
Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in s = 13     TeV p p collisions with the ATLAS detector journal March 2018
Search for heavy long-lived charged particles in pp collisions at s=7 TeV journal July 2012
The timing system for the CDF electromagnetic calorimeters
  • Goncharov, M.; Kamon, T.; Khotilovich, V.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 565, Issue 2 https://doi.org/10.1016/j.nima.2006.06.011
journal September 2006
Triggers for displaced decays of long-lived neutral particles in the ATLAS detector journal July 2013
Search for neutral weakly interacting massive particles in the Fermilab Tevatron wideband neutrino beam journal July 1995
Mini-Split journal February 2013
Search for decays of stopped exotic long-lived particles produced in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal May 2018
Search for Heavy Long-Lived Particles that Decay to Photons at CDF II journal September 2007
Theories with gauge-mediated supersymmetry breaking journal December 1999
Long-lived neutralino NLSPs journal October 2010
Precision predictions for electroweak superpartner production at hadron colliders with Resummino journal July 2013
Phenomenological analysis of Higgs boson production through gluon fusion in association with jets journal January 2016
Natural Electroweak Breaking from a Mirror Symmetry journal June 2006
Prospects of searches for neutral, long-lived particles that decay to photons using timing at CDF journal December 2004

Cited By (10)

Dark mesons at the LHC journal July 2019
A sceptical analysis of quantized inertia journal August 2019
Study of energy deposition patterns in hadron calorimeter for prompt and displaced jets using convolutional neural network text January 2019
Dark Mesons at the LHC text January 2018
Stopping Quirks at the LHC text January 2018
Discovering the Twin Higgs Boson with Displaced Decays text January 2018
Seeking for sterile neutrinos with displaced leptons at the LHC text January 2019
Study of energy deposition patterns in hadron calorimeter for prompt and displaced jets using convolutional neural network text January 2019
Hypercharged Naturalness text January 2019
A sceptical analysis of Quantized Inertia text January 2019

Figures / Tables (4)

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