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Article: Limits on large extra dimensions based on observations of neutron stars with the Fermi-LAT

TitleLimits on large extra dimensions based on observations of neutron stars with the Fermi-LAT
Authors
KeywordsCore-Collapse Supernovas
Extra Dimensions
Gravity
Neutron Stars
Issue Date2012
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAP
Citation
Journal Of Cosmology And Astroparticle Physics, 2012, v. 2012 n. 2 How to Cite?
AbstractWe present limits for the compactification scale in the theory of Large Extra Dimensions (LED) proposed by Arkani-Hamed, Dimopoulos, and Dvali. We use 11 months of data from the Fermi Large Area Telescope (Fermi-LAT) to set gamma ray flux limits for 6 gamma-ray faint neutron stars (NS). To set limits on LED we use the model of Hannestad and Raffelt (HR) that calculates the Kaluza-Klein (KK) graviton production in supernova cores and the large fraction subsequently gravitationally bound around the resulting NS. The predicted decay of the bound KK gravitons to γγ should contribute to the flux from NSs. Considering 2 to 7 extra dimensions of the same size in the context of the HR model, we use Monte Carlo techniques to calculate the expected differential flux of gamma-rays arising from these KK gravitons, including the effects of the age of the NS, graviton orbit, and absorption of gamma-rays in the magnetosphere of the NS. We compare our Monte Carlo-based differential flux to the experimental differential flux using maximum likelihood techniques to obtain our limits on LED. Our limits are more restrictive than past EGRET-based optimistic limits that do not include these important corrections. Additionally, our limits are more stringent than LHC based limits for 3 or fewer LED, and comparable for 4 LED. We conclude that if the effective Planck scale is around a TeV, then for 2 or 3 LED the compactification topology must be more complicated than a torus. © 2012 IOP Publishing Ltd and SISSA.
Persistent Identifierhttp://hdl.handle.net/10722/188425
ISSN
2015 Impact Factor: 5.634
2015 SCImago Journal Rankings: 0.652
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAjello, Men_US
dc.contributor.authorBaldini, Len_US
dc.contributor.authorBarbiellini, Gen_US
dc.contributor.authorBastieri, Den_US
dc.contributor.authorBechtol, Ken_US
dc.contributor.authorBellazzini, Ren_US
dc.contributor.authorBerenji, Ben_US
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dc.contributor.authorBonamente, Een_US
dc.contributor.authorBorgland, AWen_US
dc.contributor.authorBregeon, Jen_US
dc.contributor.authorSuson, DJen_US
dc.contributor.authorTajima, Hen_US
dc.contributor.authorTakahashi, Hen_US
dc.contributor.authorTanaka, Ten_US
dc.contributor.authorThayer, JGen_US
dc.contributor.authorThayer, JBen_US
dc.contributor.authorTibaldo, Len_US
dc.contributor.authorTinivella, Men_US
dc.contributor.authorTorres, DFen_US
dc.contributor.authorTroja, Een_US
dc.contributor.authorBrigida, Men_US
dc.contributor.authorUchiyama, Yen_US
dc.contributor.authorUsher, TLen_US
dc.contributor.authorVandenbroucke, Jen_US
dc.contributor.authorVasileiou, Ven_US
dc.contributor.authorVianello, Gen_US
dc.contributor.authorVitale, Ven_US
dc.contributor.authorWaite, APen_US
dc.contributor.authorWiner, BLen_US
dc.contributor.authorWood, KSen_US
dc.contributor.authorWood, Men_US
dc.contributor.authorBruel, Pen_US
dc.contributor.authorYang, Zen_US
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dc.contributor.authorBuson, Sen_US
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dc.contributor.authorCohenTanugi, Jen_US
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dc.date.accessioned2013-09-03T04:05:50Z-
dc.date.available2013-09-03T04:05:50Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Cosmology And Astroparticle Physics, 2012, v. 2012 n. 2en_US
dc.identifier.issn1475-7516en_US
dc.identifier.urihttp://hdl.handle.net/10722/188425-
dc.description.abstractWe present limits for the compactification scale in the theory of Large Extra Dimensions (LED) proposed by Arkani-Hamed, Dimopoulos, and Dvali. We use 11 months of data from the Fermi Large Area Telescope (Fermi-LAT) to set gamma ray flux limits for 6 gamma-ray faint neutron stars (NS). To set limits on LED we use the model of Hannestad and Raffelt (HR) that calculates the Kaluza-Klein (KK) graviton production in supernova cores and the large fraction subsequently gravitationally bound around the resulting NS. The predicted decay of the bound KK gravitons to γγ should contribute to the flux from NSs. Considering 2 to 7 extra dimensions of the same size in the context of the HR model, we use Monte Carlo techniques to calculate the expected differential flux of gamma-rays arising from these KK gravitons, including the effects of the age of the NS, graviton orbit, and absorption of gamma-rays in the magnetosphere of the NS. We compare our Monte Carlo-based differential flux to the experimental differential flux using maximum likelihood techniques to obtain our limits on LED. Our limits are more restrictive than past EGRET-based optimistic limits that do not include these important corrections. Additionally, our limits are more stringent than LHC based limits for 3 or fewer LED, and comparable for 4 LED. We conclude that if the effective Planck scale is around a TeV, then for 2 or 3 LED the compactification topology must be more complicated than a torus. © 2012 IOP Publishing Ltd and SISSA.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAPen_US
dc.relation.ispartofJournal of Cosmology and Astroparticle Physicsen_US
dc.subjectCore-Collapse Supernovasen_US
dc.subjectExtra Dimensionsen_US
dc.subjectGravityen_US
dc.subjectNeutron Starsen_US
dc.titleLimits on large extra dimensions based on observations of neutron stars with the Fermi-LATen_US
dc.typeArticleen_US
dc.identifier.emailSaz Parkinson, PM: pablosp@hku.hken_US
dc.identifier.authoritySaz Parkinson, PM=rp01803en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/1475-7516/2012/02/012en_US
dc.identifier.scopuseid_2-s2.0-84863289845en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84863289845&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume2012en_US
dc.identifier.issue2en_US
dc.identifier.isiWOS:000301176000013-
dc.publisher.placeUnited Kingdomen_US
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