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Title: Tracking down quirks at the Large Hadron Collider

Abstract

Non-helical tracks are the smoking gun signature of charged and/or colored quirks, which are pairs of particles bound by a new, long-range confining force. We introduce an approach to efficiently search for these non-helical tracks at the LHC, without the need to fit their trajectories. We show that the hits corresponding to quirky trajectories can be selected efficiently by searching for co-planar hits in the inner layers of the ATLAS and CMS trackers, even in the presence of on average 50 pile-up vertices. We further argue that backgrounds from photon conversions and unassociated pile-up hits can be removed almost entirely, while maintaining a signal reconstruction efficiency as high as ~70%. With the 300 fb ₋1 dataset, this implies a discovery potential for string tension between 100 eV and 30 keV, and colored (electroweak charged) quirks as heavy as 1600 (650) GeV may be discovered.

Authors:
 [1];  [1];  [1];  [2]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of Sussex, Brighton (United Kingdom)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1544346
Alternate Identifier(s):
OSTI ID: 1414049
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 11; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Knapen, Simon, Lou, Hou Keong, Papucci, Michele, and Setford, Jack. Tracking down quirks at the Large Hadron Collider. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.115015.
Knapen, Simon, Lou, Hou Keong, Papucci, Michele, & Setford, Jack. Tracking down quirks at the Large Hadron Collider. United States. doi:10.1103/PhysRevD.96.115015.
Knapen, Simon, Lou, Hou Keong, Papucci, Michele, and Setford, Jack. Tue . "Tracking down quirks at the Large Hadron Collider". United States. doi:10.1103/PhysRevD.96.115015. https://www.osti.gov/servlets/purl/1544346.
@article{osti_1544346,
title = {Tracking down quirks at the Large Hadron Collider},
author = {Knapen, Simon and Lou, Hou Keong and Papucci, Michele and Setford, Jack},
abstractNote = {Non-helical tracks are the smoking gun signature of charged and/or colored quirks, which are pairs of particles bound by a new, long-range confining force. We introduce an approach to efficiently search for these non-helical tracks at the LHC, without the need to fit their trajectories. We show that the hits corresponding to quirky trajectories can be selected efficiently by searching for co-planar hits in the inner layers of the ATLAS and CMS trackers, even in the presence of on average 50 pile-up vertices. We further argue that backgrounds from photon conversions and unassociated pile-up hits can be removed almost entirely, while maintaining a signal reconstruction efficiency as high as ~70%. With the 300 fb₋1 dataset, this implies a discovery potential for string tension between 100 eV and 30 keV, and colored (electroweak charged) quirks as heavy as 1600 (650) GeV may be discovered.},
doi = {10.1103/PhysRevD.96.115015},
journal = {Physical Review D},
number = 11,
volume = 96,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

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Cited by: 4 works
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