The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Pair-produced heavy particle topologies: MSSM neutralino properties at the LHC from gluino / squark cascade decays

Pair-produced heavy particle topologies: MSSM neutralino properties at the LHC from gluino / squark cascade decays
Pair-produced heavy particle topologies: MSSM neutralino properties at the LHC from gluino / squark cascade decays
Processes of the form pp -> anything -> XiXj -> + + notE are studied via a technique that may be viewed as an adaptation of time-honoured Dalitz plot analyses. Xi and Xj are new heavy states (with i, j =1, . . .,n), which may be identical or distinct; and and are necessarily distinct standard model (SM) fermion pairs whose invariant masses can be measured. A Dalitz-like plot of said invariant masses, versus , exhibits a topology connected to the masses and specific decay chains of Xi and Xj. Aside from relatively minor details, observed patterns consist of a collection of box and wedge shapes. This collection is model-dependent: comparison of the observed pattern to the possibilities for a specific model yields information on which new particle pair combinations are actually being produced, information beyond that extractable from conventional one-dimensional invariant mass distributions. The technique is illustrated via application to the minimal supersymmetric standard model (MSSM) process pp -> -> e+e- + ?+?- notE. Here the heavy states are neutralinos (i = 2,3,4) - note that is excluded - which are produced in gluino/squark ( / ) cascade decay chains. Even with fairly modest expectations for the LHC performance during the first few years, this method still provides substantial insight into the neutralino mass spectrum and couplings if gluino/squark masses are relatively low (? 400 GeV).
1434-6044
477-492
Bisset, M.
9821bb62-6af3-4c74-80b4-c5fcda5099ea
Kersting, N.
44f9e365-b1fd-46b7-938f-5c0150557722
Li, J.
c01989cb-c2a9-41ed-9e23-0618c53a3e85
Moortgat, F.
03460f83-c228-4b8b-afe7-a2121ba34505
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Xie, Q.L.
3f1c366e-9cda-4ba9-b968-127fb3977839
Bisset, M.
9821bb62-6af3-4c74-80b4-c5fcda5099ea
Kersting, N.
44f9e365-b1fd-46b7-938f-5c0150557722
Li, J.
c01989cb-c2a9-41ed-9e23-0618c53a3e85
Moortgat, F.
03460f83-c228-4b8b-afe7-a2121ba34505
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Xie, Q.L.
3f1c366e-9cda-4ba9-b968-127fb3977839

Bisset, M., Kersting, N., Li, J., Moortgat, F., Moretti, S. and Xie, Q.L. (2006) Pair-produced heavy particle topologies: MSSM neutralino properties at the LHC from gluino / squark cascade decays. The European Physical Journal C, 45, 477-492. (doi:10.1140/epjc/s2005-02433-4).

Record type: Article

Abstract

Processes of the form pp -> anything -> XiXj -> + + notE are studied via a technique that may be viewed as an adaptation of time-honoured Dalitz plot analyses. Xi and Xj are new heavy states (with i, j =1, . . .,n), which may be identical or distinct; and and are necessarily distinct standard model (SM) fermion pairs whose invariant masses can be measured. A Dalitz-like plot of said invariant masses, versus , exhibits a topology connected to the masses and specific decay chains of Xi and Xj. Aside from relatively minor details, observed patterns consist of a collection of box and wedge shapes. This collection is model-dependent: comparison of the observed pattern to the possibilities for a specific model yields information on which new particle pair combinations are actually being produced, information beyond that extractable from conventional one-dimensional invariant mass distributions. The technique is illustrated via application to the minimal supersymmetric standard model (MSSM) process pp -> -> e+e- + ?+?- notE. Here the heavy states are neutralinos (i = 2,3,4) - note that is excluded - which are produced in gluino/squark ( / ) cascade decay chains. Even with fairly modest expectations for the LHC performance during the first few years, this method still provides substantial insight into the neutralino mass spectrum and couplings if gluino/squark masses are relatively low (? 400 GeV).

This record has no associated files available for download.

More information

Submitted date: 3 March 2005
Published date: 2006

Identifiers

Local EPrints ID: 57088
URI: http://eprints.soton.ac.uk/id/eprint/57088
ISSN: 1434-6044
PURE UUID: 1581bc21-1c55-4227-9b0c-41b6261ca164

Catalogue record

Date deposited: 15 Aug 2008
Last modified: 09 Nov 2021 09:52

Export record

Altmetrics

Contributors

Author: M. Bisset
Author: N. Kersting
Author: J. Li
Author: F. Moortgat
Author: S. Moretti
Author: Q.L. Xie

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×