Gravity localization on hybrid branes
Abstract
The NA60 experiment studied low-mass muon pair production in proton–nucleus (p–A) collisions using a 400 GeV proton beam at the CERN SPS. The low-mass dimuon spectrum is well described by the superposition of the two-body and Dalitz decays of the light neutral mesons η, ρ, ω, η' and φ, and no evidence of in-medium effects is found. A new high-precision measurement of the electromagnetic transition form factors of the η and ω was performed, profiting from a 10 times larger data sample than the peripheral In–In sample previously collected by NA60. Using the pole-parameterisation |F(M)|2=(1 - M2/Λ2)-2 we find Λ-2η = 1.934 ± 0.067 (stat.) ±0.050(syst.) (GeV/c2)-2 and Λ-2ω = 2.223 ± 0.026(stat.) ± 0.037(syst.) (GeV/c2)-2. An improved value of the branching ratio of the Dalitz decay ω → μ+μ-π0 is also obtained, with BR(ω → μ+μ-π0) = [1.41 ± 0.09(stat.) ± 0.15(syst.)] ×10-4. Finally, further results refer to the ρ line shape and a new limit on ρ/ω interference in hadron interactions.
- Authors:
-
- Universidade Federal do Ceará (UFC), Fortaleza, Ceará (Brazil). Departamento de Física
- Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE), Juazeiro do Norte, Ceará (Brazil)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- NA60 Collaboration
- OSTI Identifier:
- 1354708
- Report Number(s):
- BNL-113815-2017-JA; BNL-113815-2017-JAAM
Journal ID: ISSN 0370-2693; R&D Project: PO 024; KA2501032
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics Letters. B
- Additional Journal Information:
- Journal Volume: 754; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Veras, D. F.S., Cruz, W. T., Maluf, R. V., and Almeida, C. A.S. Gravity localization on hybrid branes. United States: N. p., 2016.
Web. doi:10.1016/j.physletb.2016.01.013.
Veras, D. F.S., Cruz, W. T., Maluf, R. V., & Almeida, C. A.S. Gravity localization on hybrid branes. United States. https://doi.org/10.1016/j.physletb.2016.01.013
Veras, D. F.S., Cruz, W. T., Maluf, R. V., and Almeida, C. A.S. Tue .
"Gravity localization on hybrid branes". United States. https://doi.org/10.1016/j.physletb.2016.01.013. https://www.osti.gov/servlets/purl/1354708.
@article{osti_1354708,
title = {Gravity localization on hybrid branes},
author = {Veras, D. F.S. and Cruz, W. T. and Maluf, R. V. and Almeida, C. A.S.},
abstractNote = {The NA60 experiment studied low-mass muon pair production in proton–nucleus (p–A) collisions using a 400 GeV proton beam at the CERN SPS. The low-mass dimuon spectrum is well described by the superposition of the two-body and Dalitz decays of the light neutral mesons η, ρ, ω, η' and φ, and no evidence of in-medium effects is found. A new high-precision measurement of the electromagnetic transition form factors of the η and ω was performed, profiting from a 10 times larger data sample than the peripheral In–In sample previously collected by NA60. Using the pole-parameterisation |F(M)|2=(1 - M2/Λ2)-2 we find Λ-2η = 1.934 ± 0.067 (stat.) ±0.050(syst.) (GeV/c2)-2 and Λ-2ω = 2.223 ± 0.026(stat.) ± 0.037(syst.) (GeV/c2)-2. An improved value of the branching ratio of the Dalitz decay ω → μ+μ-π0 is also obtained, with BR(ω → μ+μ-π0) = [1.41 ± 0.09(stat.) ± 0.15(syst.)] ×10-4. Finally, further results refer to the ρ line shape and a new limit on ρ/ω interference in hadron interactions.},
doi = {10.1016/j.physletb.2016.01.013},
journal = {Physics Letters. B},
number = ,
volume = 754,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 2016},
month = {Tue Mar 01 00:00:00 EST 2016}
}
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