How to prove that a excess at the LHC is not due to dark matter
Abstract
If the LHC is able to produce dark matter particles, they would appear at the end of cascade decay chains, manifesting themselves as missing transverse energy. However, such “dark matter candidates” may themselves decay invisibly. We propose to test for this possibility by studying the effect of particle widths on the observable invariant mass distributions of the visible particles seen in the detector. We consider the simplest nontrivial case of a two-step two-body cascade decay and derive analytically the shapes of the invariant mass distributions, for generic values of the widths of the new particles. We demonstrate that the resulting distortion in the shape of the invariant mass distribution can be significant enough to measure the width of the dark matter “candidate,” ruling it out as the source of the cosmological dark matter.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Florida, Gainesville, FL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1470792
- Alternate Identifier(s):
- OSTI ID: 1501640
- Grant/Contract Number:
- SC0010296
- Resource Type:
- Journal Article: Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 98 Journal Issue: 5; 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
Kim, Doojin, and Matchev, Konstantin T. How to prove that a E T excess at the LHC is not due to dark matter. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.055018.
Kim, Doojin, & Matchev, Konstantin T. How to prove that a E T excess at the LHC is not due to dark matter. United States. https://doi.org/10.1103/PhysRevD.98.055018
Kim, Doojin, and Matchev, Konstantin T. 2018.
"How to prove that a E T excess at the LHC is not due to dark matter". United States. https://doi.org/10.1103/PhysRevD.98.055018.
@article{osti_1470792,
title = {How to prove that a E T excess at the LHC is not due to dark matter},
author = {Kim, Doojin and Matchev, Konstantin T.},
abstractNote = {If the LHC is able to produce dark matter particles, they would appear at the end of cascade decay chains, manifesting themselves as missing transverse energy. However, such “dark matter candidates” may themselves decay invisibly. We propose to test for this possibility by studying the effect of particle widths on the observable invariant mass distributions of the visible particles seen in the detector. We consider the simplest nontrivial case of a two-step two-body cascade decay and derive analytically the shapes of the invariant mass distributions, for generic values of the widths of the new particles. We demonstrate that the resulting distortion in the shape of the invariant mass distribution can be significant enough to measure the width of the dark matter “candidate,” ruling it out as the source of the cosmological dark matter.},
doi = {10.1103/PhysRevD.98.055018},
url = {https://www.osti.gov/biblio/1470792},
journal = {Physical Review. D.},
issn = {2470-0010},
number = 5,
volume = 98,
place = {United States},
year = {Fri Sep 14 00:00:00 EDT 2018},
month = {Fri Sep 14 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
Works referenced in this record:
Cold dark matter and the LHC
journal, August 2004
- Battaglia, Marco; Hinchliffe, Ian; Tovey, Daniel
- Journal of Physics G: Nuclear and Particle Physics, Vol. 30, Issue 10
Connecting LHC, ILC, and quintessence
journal, October 2007
- Chung, Daniel J. H.; Everett, Lisa L.; Kong, Kyoungchul
- Journal of High Energy Physics, Vol. 2007, Issue 10
Light neutralino dark matter in the next-to-minimal supersymmetric standard model
journal, January 2006
- Gunion, John F.; Hooper, Dan; McElrath, Bob
- Physical Review D, Vol. 73, Issue 1
One-loop calculations of the decay of the next-to-lightest neutralino in the MSSM
journal, February 2007
- Drees, Manuel; Hollik, Wolfgang; Xu, Qingjun
- Journal of High Energy Physics, Vol. 2007, Issue 02
Kinematic cusps with two missing particles. II. Cascade decay topology
journal, February 2013
- Han, Tao; Kim, Ian-Woo; Song, Jeonghyeon
- Physical Review D, Vol. 87, Issue 3
Interference effects in BSM processes with a generalised narrow-width approximation
journal, June 2015
- Fuchs, Elina; Thewes, Silja; Weiglein, Georg
- The European Physical Journal C, Vol. 75, Issue 6
Breakdown of the Narrow Width Approximation for New Physics
journal, September 2007
- Berdine, D.; Kauer, N.; Rainwater, D.
- Physical Review Letters, Vol. 99, Issue 11
A general method for model-independent measurements of particle spins, couplings and mixing angles in cascade decays with missing energy at hadron colliders
journal, October 2008
- Burns, Michael; Kong, Kyoungchul; Matchev, Konstantin T.
- Journal of High Energy Physics, Vol. 2008, Issue 10
Distinguishing spins in supersymmetric and universal extra dimension models at the large hadron collider
journal, October 2005
- Smillie, Jennifer M.; Webber, Bryan R.
- Journal of High Energy Physics, Vol. 2005, Issue 10
Determining the spin of supersymmetric particles at the LHC using lepton charge asymmetry
journal, August 2004
- Barr, A. J.
- Physics Letters B, Vol. 596, Issue 3-4
Superweakly interacting massive particle dark matter signals from the early Universe
journal, September 2003
- Feng, Jonathan L.; Rajaraman, Arvind; Takayama, Fumihiro
- Physical Review D, Vol. 68, Issue 6
Kinematic edges with flavor oscillation and non-zero widths
journal, October 2011
- Grossman, Yuval; Martone, Mario; Robinson, Dean J.
- Journal of High Energy Physics, Vol. 2011, Issue 10
Spin measurements in cascade decays at the LHC
journal, April 2007
- Wang, Lian-Tao; Yavin, Itay
- Journal of High Energy Physics, Vol. 2007, Issue 04
Neutrino alternatives for missing energy events at colliders
journal, July 2009
- Chang, Spencer; de Gouvêa, André
- Physical Review D, Vol. 80, Issue 1
Determination of dark matter properties at high-energy colliders
journal, November 2006
- Baltz, Edward A.; Battaglia, Marco; Peskin, Michael E.
- Physical Review D, Vol. 74, Issue 10
Production of extra quarks decaying to dark matter beyond the narrow width approximation at the LHC
journal, August 2017
- Moretti, Stefano; O’Brien, Dermot; Panizzi, Luca
- Physical Review D, Vol. 96, Issue 3
Reconstructing dark matter density with linear collider in focus-point supersymmetry
journal, October 2005
- Moroi, Takeo; Shimizu, Yasuhiro; Yotsuyanagi, Akira
- Physics Letters B, Vol. 625, Issue 1-2
Radiative distortion of kinematic edges in cascade decays
journal, July 2017
- Beneke, M.; Jenniches, L.; Mück, A.
- Physics Letters B, Vol. 770
Probing gauge-mediated supersymmetry breaking models at the Fermilab Tevatron via delayed decays of the lightest neutralino
journal, September 1998
- Chen, C. -H.; Gunion, J. F.
- Physical Review D, Vol. 58, Issue 7
Finite width effects in φ radiative decays
journal, February 2003
- Oller, José A.
- Nuclear Physics A, Vol. 714, Issue 1-2
Constraining dark matter in the MSSM at the LHC
journal, March 2006
- Nojiri, Mihoko M.; Polesello, Giacomo; Tovey, Daniel R.
- Journal of High Energy Physics, Vol. 2006, Issue 03
Precision SUSY measurements at CERN LHC
journal, May 1997
- Hinchliffe, I.; Paige, F. E.; Shapiro, M. D.
- Physical Review D, Vol. 55, Issue 9
Mass bounds on a very light neutralino
journal, May 2009
- Dreiner, Herbi K.; Heinemeyer, Sven; Kittel, Olaf
- The European Physical Journal C, Vol. 62, Issue 3
Requirements on collider data to match the precision of WMAP on supersymmetric dark matter
journal, December 2004
- Allanach, B. C.; Belanger, G.; Boudjema, F.
- Journal of High Energy Physics, Vol. 2004, Issue 12
Finite width effects in top quark decays
journal, March 1995
- Mahlon, Gregory; Parke, Stephen
- Physics Letters B, Vol. 347, Issue 3-4
Hadron colliders as the “neutralino factory”: Search for a slow decay of the lightest neutralino at the CERN LHC
journal, January 1998
- Maki, K.; Orito, S.
- Physical Review D, Vol. 57, Issue 1
Finite-width effects in unstable-particle production at hadron colliders
journal, May 2013
- Falgari, P.; Papanastasiou, A. S.; Signer, A.
- Journal of High Energy Physics, Vol. 2013, Issue 5
New detectors to explore the lifetime frontier
journal, April 2017
- Chou, John Paul; Curtin, David; Lubatti, H. J.
- Physics Letters B, Vol. 767
Measurement of masses in the $\mathrm{t}\overline{\mathrm{t}}$ system by kinematic endpoints in pp collisions at $\sqrt{s}=7\ \mathrm{TeV}$
journal, July 2013
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- The European Physical Journal C, Vol. 73, Issue 7
Dark matter production in the early Universe: Beyond the thermal WIMP paradigm
journal, February 2015
- Baer, Howard; Choi, Ki-Young; Kim, Jihn E.
- Physics Reports, Vol. 555
Figures / Tables found in this record: