Home << 1 2 3 4 5 6 7 8 9 10 >> [11–17]
List View
 | 
Citations
 | 
Details
   web
Records
Author Hajjar, R.; Palomares-Ruiz, S.; Mena, O.
Title Shedding light on the Δm21^2 tension with supernova neutrinos Type Journal Article
Year 2024 Publication (down) Physics Letters B Abbreviated Journal Phys. Lett. B
Volume 854 Issue Pages 138719 - 8pp
Keywords
Abstract One long-standing tension in the determination of neutrino parameters is the mismatched value of the solar mass square difference, Delta m(21)(2), measured by different experiments: the reactor antineutrino experiment KamLAND finds a best fit larger than the one obtained with solar neutrino data. Even if the current tension is mild (similar to 1.5 sigma.), it is timely to explore if independent measurements could help in either closing or reassessing this issue. In this regard, we explore how a future supernova burst in our galaxy could be used to determine Delta m(21)(2) at the future Hyper-Kamiokande detector, and how this could contribute to the current situation. We study Earth matter effects for different models of supernova neutrino spectra and supernova orientations. We find that, if supernova neutrino data prefers the KamLAND best fit for Delta m(21)(2), an uncertainty similar to the current KamLAND one could be achieved. On the contrary, if it prefers the solar neutrino data best fit, the current tension with KamLAND results could grow to a significance larger than 5 sigma. Furthermore, supernova neutrinos could significantly contribute to reducing the uncertainty on sin (2)theta(12).
Address [Hajjar, Rasmi; Palomares-Ruiz, Sergio; Mena, Olga] Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, Parc Cientif UV, C-Catedrat Jose Beltran 2, E-46980 Paterna, Spain, Email: rasmi.hajjar@ific.uv.es;
Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0370-2693 ISBN Medium
Area Expedition Conference
Notes WOS:001246913500002 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ pastor @ Serial 6159
Permanent link to this record
 
 
Author Edgecock, T.R. et al; Agarwalla, S.K.; Cervera-Villanueva, A.; Donini, A.; Ghosh, T.; Gomez-Cadenas, J.J.; Hernandez, P.; Martin-Albo, J.; Mena, O.
Title High intensity neutrino oscillation facilities in Europe Type Journal Article
Year 2013 Publication (down) Physical Review Special Topics-Accelerators and Beams Abbreviated Journal Phys. Rev. Spec. Top.-Accel. Beams
Volume 16 Issue 2 Pages 021002 - 18pp
Keywords
Abstract The EUROnu project has studied three possible options for future, high intensity neutrino oscillation facilities in Europe. The first is a Super Beam, in which the neutrinos come from the decay of pions created by bombarding targets with a 4 MW proton beam from the CERN High Power Superconducting Proton Linac. The far detector for this facility is the 500 kt MEMPHYS water Cherenkov, located in the Frejus tunnel. The second facility is the Neutrino Factory, in which the neutrinos come from the decay of mu(+) and mu(-) beams in a storage ring. The far detector in this case is a 100 kt magnetized iron neutrino detector at a baseline of 2000 km. The third option is a Beta Beam, in which the neutrinos come from the decay of beta emitting isotopes, in particular He-6 and Ne-18, also stored in a ring. The far detector is also the MEMPHYS detector in the Frejus tunnel. EUROnu has undertaken conceptual designs of these facilities and studied the performance of the detectors. Based on this, it has determined the physics reach of each facility, in particular for the measurement of CP violation in the lepton sector, and estimated the cost of construction. These have demonstrated that the best facility to build is the Neutrino Factory. However, if a powerful proton driver is constructed for another purpose or if the MEMPHYS detector is built for astroparticle physics, the Super Beam also becomes very attractive.
Address [Edgecock, T. R.; Caretta, O.; Davenne, T.; Densam, C.; Fitton, M.; Kelliher, D.; Loveridge, P.; Machida, S.; Prior, C.; Rogers, C.; Rooney, M.; Thomason, J.; Wilcox, D.] STFC Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1098-4402 ISBN Medium
Area Expedition Conference
Notes WOS:000315152000001 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ pastor @ Serial 1333
Permanent link to this record
 
 
Author Mena, O.; Palomares-Ruiz, S.; Vincent, A.C.
Title Flavor Composition of the High-Energy Neutrino Events in IceCube Type Journal Article
Year 2014 Publication (down) Physical Review Letters Abbreviated Journal Phys. Rev. Lett.
Volume 113 Issue 9 Pages 091103 - 5pp
Keywords
Abstract The IceCube experiment has recently reported the observation of 28 high-energy (> 30 TeV) neutrino events, separated into 21 showers and 7 muon tracks, consistent with an extraterrestrial origin. In this Letter, we compute the compatibility of such an observation with possible combinations of neutrino flavors with relative proportion (alpha(e:)alpha(mu):alpha tau)(circle plus). Although the 7: 21 track-to-shower ratio is naively favored for the canonical (1:1:1)(circle plus) at Earth, this is not true once the atmospheric muon and neutrino backgrounds are properly accounted for. We find that, for an astrophysical neutrino E-2 energy spectrum, (1:1:1)(circle plus). at Earth is disfavored at 81% C. L. If this proportion does not change, 6 more years of data would be needed to exclude (1:1:1)(circle plus) at Earth at 3 sigma C.L. Indeed, with the recently released 3-yr data, that flavor composition is excluded at 92% C. L. The best fit is obtained for (1:0:0)(circle plus). at Earth, which cannot be achieved from any flavor ratio at sources with averaged oscillations during propagation. If confirmed, this result would suggest either a misunderstanding of the expected background events or a misidentification of tracks as showers, or even more compellingly, some exotic physics which deviates from the standard scenario.
Address [Mena, Olga; Palomares-Ruiz, Sergio; Vincent, Aaron C.] Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, E-46071 Valencia, Spain, Email: omena@ific.uv.es;
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0031-9007 ISBN Medium
Area Expedition Conference
Notes WOS:000341292800005 Approved no
Is ISI yes International Collaboration no
Call Number IFIC @ pastor @ Serial 1920
Permanent link to this record
 
 
Author Pompa, F.; Capozzi, F.; Mena, O.; Sorel, M.
Title Absolute nu Mass Measurement with the DUNE Experiment Type Journal Article
Year 2022 Publication (down) Physical Review Letters Abbreviated Journal Phys. Rev. Lett.
Volume 129 Issue 12 Pages 121802 - 6pp
Keywords
Abstract Time of flight delay in the supernova neutrino signal offers a unique tool to set model-independent constraints on the absolute neutrino mass. The presence of a sharp time structure during a first emission phase, the so-called neutronization burst in the electron neutrino flavor time distribution, makes this channel a very powerful one. Large liquid argon underground detectors will provide precision measurements of the time dependence of the electron neutrino fluxes. We derive here a new v mass sensitivity attainable at the future DUNE far detector from a future supernova collapse in our galactic neighborhood, finding a sub-eV reach under favorable scenarios. These values are competitive with those expected for laboratory direct neutrino mass searches.
Address [Pompa, Federica; Capozzi, Francesco; Mena, Olga; Sorel, Michel] Univ Valencia, Inst Fis Corpuscular IFIC, CSIC, Parc Cientif UV, c Catedrat Jose Beltran 2, Paterna 46980, Spain, Email: federica.pompa@ific.uv.es;
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0031-9007 ISBN Medium
Area Expedition Conference
Notes WOS:000861178800003 Approved no
Is ISI yes International Collaboration no
Call Number IFIC @ pastor @ Serial 5366
Permanent link to this record
 
 
Author Fernandez-Martinez, E.; Giordano, G.; Mena, O.; Mocioiu, I.
Title Atmospheric neutrinos in ice and measurement of neutrino oscillation parameters Type Journal Article
Year 2010 Publication (down) Physical Review D Abbreviated Journal Phys. Rev. D
Volume 82 Issue 9 Pages 093011 - 7pp
Keywords
Abstract The main goal of the IceCube Deep Core array is to search for neutrinos of astrophysical origins. Atmospheric neutrinos are commonly considered as a background for these searches. We show that the very high statistics atmospheric neutrino data can be used to obtain precise measurements of the main oscillation parameters.
Address [Fernandez-Martinez, Enrique] Werner Heisenberg Inst, Max Planck Inst Phys, D-80805 Munich, Germany
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1550-7998 ISBN Medium
Area Expedition Conference
Notes ISI:000284259000002 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ elepoucu @ Serial 332
Permanent link to this record
 
 
Author Lopez Honorez, L.; Mena, O.; Panotopoulos, G.
Title Higher-order coupled quintessence Type Journal Article
Year 2010 Publication (down) Physical Review D Abbreviated Journal Phys. Rev. D
Volume 82 Issue 12 Pages 123525 - 7pp
Keywords
Abstract We study a coupled quintessence model in which the interaction with the dark-matter sector is a function of the quintessence potential. Such a coupling can arise from a field dependent mass term for the dark-matter field. The dynamical analysis of a standard quintessence potential coupled with the interaction explored here shows that the system possesses a late-time accelerated attractor. In light of these results, we perform a fit to the most recent Supernovae Ia, Cosmic Microwave Background, and Baryon Acoustic Oscillation data sets. Constraints arising from weak equivalence principle violation arguments are also discussed.
Address [Lopez Honorez, Laura] UAM, Dept Phys, Madrid 28049, Spain
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1550-7998 ISBN Medium
Area Expedition Conference
Notes ISI:000286744800005 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ pastor @ Serial 529
Permanent link to this record
 
 
Author Pandolfi, S.; Giusarma, E.; Kolb, E.W.; Lattanzi, M.; Melchiorri, A.; Mena, O.; Pena, M.; Cooray, A.; Serra, P.
Title Impact of general reionization scenarios on extraction of inflationary parameters Type Journal Article
Year 2010 Publication (down) Physical Review D Abbreviated Journal Phys. Rev. D
Volume 82 Issue 12 Pages 123527 - 10pp
Keywords
Abstract Determination of whether the Harrison-Zel'dovich spectrum for primordial scalar perturbations is consistent with observations is sensitive to assumptions about the reionization scenario. In light of this result, we revisit constraints on inflationary models using more general reionization scenarios. While the bounds on the tensor-to-scalar ratio are largely unmodified, when different reionization schemes are addressed, hybrid models are back into the inflationary game. In the general reionization picture, we reconstruct both the shape and amplitude of the inflaton potential. We discuss how relaxing the simple reionization restriction affects the reconstruction of the potential through the changes in the constraints on the spectral index, the tensor-to-scalar ratio and the running of the spectral index. We also find that the inclusion of other Cosmic Microwave Background data in addition to the Wilkinson Microwave Anisotropy probe data excludes the very flat potentials typical of models in which the inflationary evolution reaches a late-time attractor, as a consequence of the fact that the running of the spectral index is constrained to be different from zero at 99% confidence level.
Address [Pandolfi, Stefania; Lattanzi, Massimiliano; Melchiorri, Alessandro] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1550-7998 ISBN Medium
Area Expedition Conference
Notes ISI:000286744800007 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ pastor @ Serial 530
Permanent link to this record
 
 
Author Giordano, G.; Mena, O.; Mocioiu, I.
Title Atmospheric neutrino oscillations and tau neutrinos in ice Type Journal Article
Year 2010 Publication (down) Physical Review D Abbreviated Journal Phys. Rev. D
Volume 81 Issue 11 Pages 113008 - 5pp
Keywords
Abstract The main goal of the IceCube Deep Core Array is to search for neutrinos of astrophysical origins. Atmospheric neutrinos are commonly considered as a background for these searches. We show here that cascade measurements in the Ice Cube Deep Core Array can provide strong evidence for tau neutrino appearance in atmospheric neutrino oscillations. Controlling systematic uncertainties will be the limiting factor in the analysis. A careful study of these tau neutrinos is crucial, since they constitute an irreducible background for astrophysical neutrino detection.
Address [Giordano, Gerardo; Mocioiu, Irina] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1550-7998 ISBN Medium
Area Expedition Conference
Notes ISI:000279159600001 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ elepoucu @ Serial 421
Permanent link to this record
 
 
Author Razzaque, S.; Jean, P.; Mena, O.
Title High energy neutrinos from novae in symbiotic binaries: The case of V407 Cygni Type Journal Article
Year 2010 Publication (down) Physical Review D Abbreviated Journal Phys. Rev. D
Volume 82 Issue 12 Pages 123012 - 5pp
Keywords
Abstract Detection of high-energy (>= 100 MeV) gamma rays by the Fermi Large Area Telescope from a nova in the symbiotic binary system V407 Cygni has opened the possibility of high-energy neutrino detection from this type of source. A thermonuclear explosion on the white dwarf surface sets off a nova shell in motion that expands and slows down in a dense surrounding medium provided by the red giant companion. Particles are accelerated in the shocks of the shell and interact with the surrounding medium to produce observed gamma rays. We show that proton-proton interaction, which is most likely responsible for producing gamma rays via neutral pion decay, produces >= 0:1 GeV neutrinos that can be detected by the current and future experiments at >= 10 GeV.
Address [Razzaque, Soebur] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA, Email: srazzaque@ssd5.nrl.navy.mil
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1550-7998 ISBN Medium
Area Expedition Conference
Notes ISI:000286748300002 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ pastor @ Serial 524
Permanent link to this record
 
 
Author Pandolfi, S.; Cooray, A.; Giusarma, E.; Kolb, E.W.; Melchiorri, A.; Mena, O.; Serra, P.
Title Harrison-Zel'dovich primordial spectrum is consistent with observations Type Journal Article
Year 2010 Publication (down) Physical Review D Abbreviated Journal Phys. Rev. D
Volume 81 Issue 12 Pages 123509 - 6pp
Keywords
Abstract Inflation predicts primordial scalar perturbations with a nearly scale-invariant spectrum and a spectral index approximately unity [the Harrison-Zel'dovich (HZ) spectrum]. The first important step for inflationary cosmology is to check the consistency of the HZ primordial spectrum with current observations. Recent analyses have claimed that a HZ primordial spectrum is excluded at more than 99% c. l. Here we show that the HZ spectrum is only marginally disfavored if one considers a more general reionization scenario. Data from the Planck mission will settle the issue.
Address [Pandolfi, Stefania] Univ Roma La Sapienza, ICRA, I-00185 Rome, Italy
Corporate Author Thesis
Publisher Amer Physical Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1550-7998 ISBN Medium
Area Expedition Conference
Notes ISI:000278555900003 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ elepoucu @ Serial 426
Permanent link to this record