Journal article
Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at √ s = 8 TeV
Physical review. D, Particles, fields, gravitation, and cosmology, Vol.91(5), 052012
03/18/2015
DOI: 10.1103/PhysRevD.91.052012
Abstract
A search is performed for long-lived particles that decay into final states that include a pair of electrons or a pair of muons. The experimental signature is a distinctive topology consisting of a pair of charged leptons originating from a displaced secondary vertex. Events corresponding to an integrated luminosity of
19.6
(
20.5
)
fb
−
1
in the electron (muon) channel were collected with the CMS detector at the CERN LHC in proton-proton collisions at
√
s
=
8
TeV
. No significant excess is observed above standard model expectations. Upper limits on the product of the cross section and branching fraction of such a signal are presented as a function of the long-lived particle’s mean proper decay length. The limits are presented in an approximately model-independent way, allowing them to be applied to a wide class of models yielding the above topology. Over much of the investigated parameter space, the limits obtained are the most stringent to date. In the specific case of a model in which a Higgs boson in the mass range
125
–
1000
GeV
/
c
2
decays into a pair of long-lived neutral bosons in the mass range
20
–
350
GeV
/
c
2
, each of which can then decay to dileptons, the upper limits obtained are typically in the range 0.2–10 fb for mean proper decay lengths of the long-lived particles in the range 0.01–100 cm. In the case of the lowest Higgs mass considered (
125
GeV
/
c
2
), the limits are in the range 2–50 fb. These limits are sensitive to Higgs boson branching fractions as low as
1
0
−
4
.
Details
- Title: Subtitle
- Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at √ s = 8 TeV
- Creators
- CMS Collaboration (Institution)V Khachatryan - A. Alikhanyan National Laboratory
- Contributors
- B. Bilki (Contributor) - University of IowaW Clarida (Contributor) - University of IowaKamuran Dilsiz (Contributor) - University of Iowa, Physics and AstronomyM. Haytmyradov (Contributor) - University of IowaJ-P Merlo (Contributor) - University of IowaH Mermerkaya (Contributor) - University of IowaAlexi Mestvirishvili (Contributor) - University of Iowa, Physics and AstronomyA. Moeller (Contributor) - University of IowaJane M Nachtman (Contributor) - University of Iowa, Physics and AstronomyHasan Ogul (Contributor) - University of Iowa, Physics and AstronomyYasar Onel (Contributor) - University of Iowa, Physics and AstronomyF. Ozok (Contributor) - University of IowaAldo Penzo (Contributor) - University of Iowa, Physics and AstronomyR Rahmat (Contributor) - University of IowaS. Sen (Contributor) - University of IowaP Tan (Contributor) - University of IowaE. Tiras (Contributor) - University of IowaJames W Wetzel (Contributor) - University of Iowa, Physics and AstronomyKai Yi (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, Vol.91(5), 052012
- DOI
- 10.1103/PhysRevD.91.052012
- ISSN
- 1550-7998
- eISSN
- 1550-2368
- Publisher
- American Physical Society
- Grant note
- DOI: 10.13039/501100003413, name: Bundesministerium für Wissenschaft, Forschung und Wirtschaft; DOI: 10.13039/501100002428, name: Austrian Science Fund; DOI: 10.13039/501100002661, name: Fonds De La Recherche Scientifique - FNRS; DOI: 10.13039/501100003130, name: Fonds Wetenschappelijk Onderzoek; DOI: 10.13039/501100003593, name: Conselho Nacional de Desenvolvimento Científico e Tecnológico; DOI: 10.13039/501100002322, name: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; DOI: 10.13039/501100001807, name: São Paulo Research Foundation; DOI: 10.13039/100001558, name: Concern Foundation; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China; DOI: 10.13039/100007637, name: Departamento Administrativo de Ciencia, Tecnologia e Innovacion; DOI: 10.13039/100001570, name: CS Fund; DOI: 10.13039/501100001810, name: Research Promotion Foundation; DOI: 10.13039/501100002341, name: Suomen Akatemia; DOI: 10.13039/501100002347, name: Bundesministerium für Bildung und Forschung; DOI: 10.13039/501100001659, name: Deutsche Forschungsgemeinschaft; DOI: 10.13039/100003872, name: Human Growth Foundation; DOI: 10.13039/501100003448, name: General Secretariat for Research and Technology; DOI: 10.13039/501100003549, name: Országos Tudományos Kutatási Alapprogramok; DOI: 10.13039/501100001502, name: Department of Atomic Energy, Government of India; DOI: 10.13039/501100001409, name: Department of Science and Technology, Ministry of Science and Technology; DOI: 10.13039/501100001602, name: Science Foundation Ireland; DOI: 10.13039/501100004007, name: Istituto Nazionale di Fisica Nucleare; DOI: 10.13039/501100003621, name: Ministry of Science, ICT and Future Planning; DOI: 10.13039/501100003725, name: National Research Foundation of Korea; DOI: 10.13039/501100001865, name: LAS; DOI: 10.13039/501100004386, name: UM; DOI: 10.13039/501100003141, name: Consejo Nacional de Ciencia y Tecnología; DOI: 10.13039/501100003524, name: Ministry of Business, Innovation and Employment; DOI: 10.13039/501100001871, name: Fundação para a Ciência e a Tecnologia; DOI: 10.13039/501100003822, name: Joint Institute for Nuclear Research; DOI: 10.13039/501100002674, name: Russian Academy of Sciences; DOI: 10.13039/501100002261, name: Russian Foundation for Basic Research; DOI: 10.13039/501100004192, name: National Science and Technology Development Agency; DOI: 10.13039/501100004742, name: National Academy of Sciences of Ukraine; DOI: 10.13039/501100000271, name: Science and Technology Facilities Council; DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation; DOI: 10.13039/501100000781, name: European Research Council; DOI: 10.13039/501100004117, name: A.G. Leventis Foundation; DOI: 10.13039/100000879, name: A. P. Sloan Foundation; DOI: 10.13039/100005156, name: Alexander von Humboldt-Stiftung; DOI: 10.13039/501100003132, name: Agentschap voor Innovatie door Wetenschap en Technologie; DOI: 10.13039/501100001823, name: Ministry of Education, Youth and Sports; DOI: 10.13039/501100001870, name: Foundation For Polish Science; DOI: 10.13039/100007388, name: Compagnia di San Paolo; DOI: 10.13039/501100003407, name: Ministero dell’Istruzione, dell’Università e della Ricerca, award: 20108T4XTM; DOI: 10.13039/501100004586, name: FAPERJ; name: MES; name: CAS; name: MoST; name: MSES; name: MoER; name: ERC IUT; DOI: 10.13039/501100008530, name: ERDF; name: MEC; name: HIP; name: CEA; name: CNRS/IN2P3; name: NIH; name: IPM; name: MOE; DOI: 10.13039/501100008688, name: CINVESTAV; name: SEP; name: UASLP-FAI; DOI: 10.13039/501100008689, name: PAEC; name: MSHE; name: NSC; name: MON; name: MESTD; DOI: 10.13039/501100007136, name: SEIDI; name: CPAN; name: Swiss Funding Agencies; name: MST; name: ThEPCenter; name: IPST; name: STAR; name: TUBITAK; DOI: 10.13039/100010440, name: TAEK; DOI: 10.13039/501100008690, name: SFFR; name: EPLANET; name: Belgian Federal Science Policy Office; DOI: 10.13039/501100003134, name: Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture; name: Council of Science and Industrial Research; DOI: 10.13039/501100000780, name: European Union; name: Consorzio per la Fisica; name: EU-ESF; name: NSRF; name: National Priorities Research Program by Qatar National Research Fund
- Date published
- 03/18/2015
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984440058502771
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