1,721,008 research outputs found
A New Parametrization Of Mass Varying Neutrinos Applied In Supernovae
No full textWe propose a phenomenological model of mass varying neutrino (MaVaN) to be applied to supernovae. We consider oscillations of . νV e→νV s in this MaVaN approach and seek for possible modifications of survival probabilities. © 2012 Elsevier B.V.229-232557Fardon, R., Nelson, A.E., Weiner, N., (2004) JCAP, 410, p. 005. , arxiv:astro-ph/0309800Kaplan, D.B., Nelson, A.E., Weiner, N., (2004) Phys. Rev. Lett., 93, p. 091801. , arxiv:hep-ph/0401099Cirelli, M., Gonzalez-Garcia, M.C., Pena-Garay, C., (2005) Nucl. Phys. B, 719, p. 219. , arxiv:hep-ph/0503028de Holanda, P.C., (2009) JCAP, 907, p. 024. , arxiv:0811.0567Rossi-Torres, F., Guzzo, M.M., de Holanda, P.C., (2010) J. Phys. Conf. Ser., 203, p. 01214
The Effect Of Random Magnetic Fields In Solar Neutrino Spin-flavor Precession
No full text[No abstract available]9103106Collaboration, H., Cleveland, B.T., (1998) Astroph. J., 496, p. 505Collaboration, S., Abdurashitov, J.N., (2002) J. Exp. Theor. Phys., 95, p. 181Eksp, Zh., (2002) Teor. Fiz., 122, p. 211Gavrin, V.N., (2003) Talk Given at the VIIIth International Conference on Topics in As Troparticle and Underground Physics (TAUP 03, , http://int.phys.washington.edu/taup2003/, Seattle, Sept. 5-9Collaboration, G., Hampel, W., (1999) Phys. Lett. B, 447, p. 127Collaboration, G., Belotti, E., (2003) Talk Given at the VIIIth International Conference on Topics in Astroparticle and Underground Physics (TAUP 03, , http://int.phys.washington.edu/taup2003/, Seattle, Sept. 5-9Collaboration, S., Fukuda, S., (2001) Phys. Rev. Lett., 86, p. 5651. , Phys. Rev. Lett. 86, 5656 (2001), Phys. Lett. B 539, 179 (2002)Collaboration, S., Smy, M.B., (2004) Phys. Rev. D, 69, p. 011104Collaboration, S., Ahmad, Q.R., (2001) Phys. Rev. Lett., 87, p. 071301Collaboration, S., Ahmad, Q.R., (2002) Phys. Rev. Lett., 89, p. 011301. , ibidem 89, 011302 (2002)ibidem 92, 181301 (2004)Collaboration, K., Eguchi, K., (2003) Phys. Rev. Lett, 90, p. 021802. , KamLAND collaboration, T. Araki et al., ibidem, 94, 081801 (2005)Gago, A.M., Guzzo, M.M., De Holanda, P.C., Nunokawa, H., Peres, O.L.G., Pleitez, V., Zukanovich Funchal, R., (2002) Phys. Rev. D, 65, p. 073012Lim, C.S., Marciano, W.J., (1988) Phys. Rev. D, 37, p. 1368Akhmedov, E.K., (1988) Phys. Lett. B, 213, p. 64Balantekin, A.B., Hatchell, P.J., Loreti, F., (1990) Phys. Rev. D, 41, p. 3583Guzzo, M.M., Nunokawa, H., (1999) Astropart. Phys., 12, p. 87Akhmedov, E.K., Pulido, J., (2003) Phys. Lett. B, 553, p. 7Friedland, A., Gruzinov, A., (2003) Astropart. Phys., 19, p. 575Chauhan, B.C., Pulido, J., (2004) JHEP, 412, p. 040Guzzo, M.M., De Holanda, P.C., Reggiani, N., (2003) Phys. Lett. B, 569, p. 45Friedland, A., Lunardini, C., Pena-Garay, C., (2004) Phys. Lett. B, 594, p. 347Guzzo, M.M., De Holanda, P.C., Peres, O.L.G., (2004) Phys. Lett. B, 591, p. 1M. M. Guzzo, P. C. de Holanda and O. L. G. Peres, arXiv: hep-ph/0504185Pastor, S., Semikoz, V.B., Valle, J.W.F., (1996) Phys. Lett. B, 369, p. 301Semikoz, V.B., Torrente-Lujan, E., (1999) Nucl. Phys. B, 556, p. 353Sahu, S., Bannur, V.M., (2000) Phys. Rev. D, 61, p. 023003Bykov, A.A., Popov, V.Y., Rez, A.I., Semikoz, V.B., Sokoloff, D.D., (1999) Phys. Rev. D, 59, p. 063001Enqvist, K., Semikoz, V., Phys. Lett. B, 312 (3), pp. 310-314Miranda, O.G., Rashba, T.I., Rez, A.I., Valle, J.W.F., (2004) Phys. Rev. Lett., 93, p. 051304. , idem. Phys. Rev. D 70, 113002 (2004)M. A. Tortola, arXiv: hep-ph/0401135. Talk presented at the InternationalWorkshop on Astroparticle and High Energy Physics (AHEP-2003), Valencia, Spain, 14-18 October 2003Kh. Akhmedov, E., Tortola, M.A., Valle, J.W.F., (2004) JHEP, 405, p. 057Collaboration, S.-K., Gando, Y., (2003) Phys. Rev. Lett., 90, p. 171302Collaboration, K., Eguchi, K., (2004) Phys. Rev. Lett., 92, p. 071301Collaboration, S.-K., Liu, D.W., (2004) Phys. Rev. Lett., 93, p. 021802Nunokawa, H., Rossi, A., Semikoz, V.B., Valle, J.W.F., (1996) Nucl. Phys. B, 472, p. 495De Holanda, P.C., Liao, W., Yu. Smirnov, A., (2004) Nucl. Phys. B, 702, p. 30
Unparticles And Solar Neutrinos
No full textIf unparticle operators couple to fermions they may induce long-range forces that can cause great changes in the neutrino evolution in matter, in particular, in the Sun. Current data from solar neutrino experiments and KamLAND allow us to place stringent limits on those new interactions. © 2009 Elsevier B.V. All rights reserved.188C139141Georgi, H., (2007) Phys. Rev. Lett., 98, p. 221601Georgi, H., (2007) Phys. Lett. B, 650, p. 275Gonzalez-Garcia, M.C., de Holanda, P.C., Zukanovich Funchal, R., (2008) JCAP, 806, p. 019. , and references therei
Solar Mhd Waves And Solar Neutrinos
No full textWe analyze here how solar neutrino experiments could detect time fluctuations of the solar neutrino flux due to magnetohydrodynamics (MHD) perturbations of the solar plasma. We state that if such time fluctuations are detected, this would provide a unique signature of the Resonant Spin-Flavor Precession (RSFP) mechanism as a solution to the Solar Neutrino Problem.10701/02/158997Abdurashitov, D.N., (2001) Nucl.Phys. (Proc. Suppl.), 91, p. 36. , http://EWIServer.np1.washington.edu/SAGE/, latest results from SAGE homepageAhmad, Q.R., (2001) Phys. Rev. Lett., 87, p. 071301. , SNO CollaborationAkhmedov, E., (1988) Yad. Fiz., 47, p. 475Akhmedov, E.Kh., (1988) Phys. Lett, B, 213, p. 64Akhmedov, E.Kh., Lanza, A., Petcov, S.T., (1993) Phys. Lett. B, 303, p. 85Akhmedov, E.Kh., Lanza, A., Petcov, S.T., (1993) Phys. Lett. B, 303, p. 85Akhmedov, E.Kh., Pulido, J., (2002) Phys. Lett. B, pp. 193-198. , hep-ph/0201089, 2002/529Altmann, M., (2000) Phys. Lett. B, 490, p. 16. , GNO CollaborationBahcall, J.N., (2001) Neutrino Astrophysics, , Cambridge University Press, Cambridge, EnglandBahcall, J.N., Basu, S., Pinsonneault, M.H., (2001) Astrophys. J, 555, p. 990Bahcall, J.N., Pinsonneault, M.H., (1992) Rev. Mod. Phys., 64, p. 885Bahcall, J.N., Ulrich, R.K., (1988) Rev. Mod. Phys, 60, p. 297Balantekin, A.B., Hatchell, P.J., Loreti, F., (1990) Phys. Rev. D, 41, p. 3583Balantekin, A.B., Hatchell, P.J., Loreti, F., (1990) Phys. Rev. D, 41, p. 3583Cattadori, C., (2001) TAUP2001, , on Behalf of GNO Collaboration, Talk Presented, 8-12 September 2001, Laboratori Nazionali del Gran Sasso, Assergi, ItalyCisneros, A., (1971) Astron. Space Sci., 10, p. 87Ermilova, V.K., Tsarev, V.A., Chechin, V.A., (1986) Kr. Soob, Fiz., Lebedev Inst., 5, p. 26Fukuda, S., (2001) Phys. Rev Lett., 86, p. 5651. , SuperKamiokande CollaborationFukuda, S., (2001) Phys. Rev. Lett., 86, p. 5656. , SuperKamiokande CollaborationGoedbloed, J.P., (1974) Physica, 53, p. 412Goedbloed, J.P., Sakanaka, P.H., (1974) Phys. Fluids, 17, p. 908Guzzo, M.M., Nunokawa, H., Current Status of the Resonant Spin-flavor Solution to the Solar Neutrino Problem, , HEP-PH/9810408Guzzo, M.M., De Holanda, P.C., Reggiani, N., MHD Fluctuations and Low Energy Solar Neutrinos (2002) Eur. Phys.Guzzo, M.M., Reggiani, N., Colonia, J.H., De Holanda, P.C., (2000) Braz. J. Phys., 30, p. 594Guzzo, M.M., Reggiani, N., Colonia, J.H., (1997) Phys. Rev. D, 56, p. 588Hampel, W., (1999) Phys. Lett. B, 447, p. 127. , GALLEX CollaborationKrastev, P.I., (1993) Phys. Lett. B, 303, p. 75Krastev, P.I., Smirnov, A.Yu., (1989) Phys. Lett. B, 226, p. 341Lande, K., (1998) Astrophys. J., 496, p. 505. , Homestake CollaborationLanou, R.E., (1999) Nucl. Phys. Proc. Suppl., 77, pp. 55-63(1999) Proceedings of the 8th International Workshop on Neutrino Telescopies, 1, p. 139. , M. Baldo Ceolin (ed.), Venice, ItalyLim, C.S., Marciano, W.J., (1988) Phys. Rev. D, 37, p. 1368Malvezzi, S., (1998) Nucl. Phys. B (Proc. Suppl.), 66, p. 346Minakata, H., Nunokawa, H., (1989) Phys. Rev. Lett., 63, p. 121Nunukawa, N., Minakata, H., (1993) Phys. Lett. B, 314, p. 371Patzak, T., (1998) Nucl. Phys. B (Proc. Suppl.), 66, p. 350Priest, E.R., (1987) Solar Magnetohydrodynamics, , D. Reidel Publishing Company, DordrechtPulido, J., (1992) Phys. Rep., 211, p. 167Reggiani, N., Guzzo, M.M., Colonia-Bartra, J.H., De Holanda, P.C., (2000) Eur. Phys. J. C, 12, p. 269Voloshin, M.B., Vysotskii, M.I., Okun, L.B., (1986) Yad. Fiz., 44, p. 677Sov. J. Nucl. Phys., 44, p. 44
Phenomenology Of Mavan's Models In Reactor Neutrino Data
No full textMass Varying Neutrinos (MaVaN's) mechanisms were proposed to link the neutrino mass scale with the dark energy density, addressing the coincidence problem. In some scenarios, this mass can present a dependence on the baryonic density felt by neutrinos, creating an effective neutrino mass that depends both on the neutrino and baryonic densities. In this work, we study the phenomenological consequence of MaVaN's scenarios in which the matter density dependence is induced by Yukawa interactions of a light neutral scalar particle which couples to neutrinos and matter. Under the assumption of one mass scale dominance, we perform an analysis of KamLAND neutrino data which depends on 4 parameters: the two standard oscillation parameters, Δ m 0, 21 2 and tan 2 θ 12, and two new coefficients which parameterize the environment dependence of neutrino mass. We introduce an Earth's crust model to compute precisely the density in each point along the neutrino trajectory. We show that this new description of density does not affect the analysis with the standard model case. With the MaVaN model, we observe a first order effect in lower density, which leads to an improvement on the data description. © 2013 M. F. Carneiro and P. C. de Holanda.2013Peebles, P.J.E., Ratra, B., The cosmological constant and dark energy (2003) Reviews of Modern Physics, 75 (2), pp. 559-606. , DOI 10.1103/RevModPhys.75.559Ade, P., Aghanim, N., Armitage-Caplan, C., Planck 2013 Results. XVI. Cosmological Parameters, , http://arxiv.org/abs/1303.5076Riess, A.G., Filippenko, A.V., Challis, P., Clocchiatti, A., Diercks, A., Garnavich, P.M., Gilliland, R.L., Kirshner, R.P., Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant (1998) Astronomical Journal, 116 (3), pp. 1009-1038. , DOI 10.1086/300499Perlmutter, S., Aldering, G., Goldhaber, G., Measurements of Ω and Λ from 42 high-redshift supernovae (1999) The Astrophysical Journal, 517 (2). , 565 10.1086/307221De Bernardis, P., Ade, P.A.R., Bock, J.J., Bond, J.R., Borrill, J., Boscaleri, A., Coble, K., Vittorio, N., A flat Universe from high-resolution maps of the cosmic microwave background radiation (2000) Nature, 404 (6781), pp. 955-959. , DOI 10.1038/35010035Bennett, C.L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., Limon, M., Meyer, S.S., Weiland, J.L., First-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: Preliminary maps and basic results (2003) Astrophysical Journal, Supplement Series, 148 (1), pp. 1-27. , DOI 10.1086/377253Fardon, R., Nelson, A.E., Weiner, N., Dark energy from mass varying neutrinos (2004) Journal of Cosmology and Astroparticle Physics, (10), pp. 75-100. , DOI 10.1088/1475-7516/2004/10/005, PII S1475751604852546Gu, P., Wang, X., Zhang, X., Dark energy and neutrino mass limits from baryogenesis (2003) Physical Review D, 68 (8), p. 087301. , DOI 10.1103/PhysRevD.68.087301Pham, Q.H., Pas, H., Cosmo MSW effect for mass varying neutrinos (2005) Modern Physics Letters A, 20 (16), pp. 1209-1215. , DOI 10.1142/S0217732305016981Weiner, N., Zurek, K.M., New matter effects and BBN constraints for mass-varying neutrinos (2006) Physical Review D, 74 (2). , 023517 10.1103/PhysRevD.74.023517Cirelli, M., Gonzalez-Garcia, M.C., Pena-Garay, C., Mass varying neutrinos in the Sun (2005) Nuclear Physics B, 719 (1-2), pp. 219-233. , DOI 10.1016/j.nuclphysb.2005.04.034, PII S0550321305003299Barger, V., Huber, P., Marfatia, D., Solar mass-varying neutrino oscillations (2005) Physical Review Letters, 95 (21), pp. 1-4. , http://oai.aps.org/oai/?verb=ListRecords&metadataPrefix= oai_apsmeta_2&set=journal:PRL:95, DOI 10.1103/PhysRevLett.95.211802, 211802De Holanda, P.C., Possible scenario for MaVaN's as the only neutrino flavor conversion mechanism in the Sun (2009) Journal of Cosmology and Astroparticle Physics, 2009 (7). , article 024 10.1088/1475-7516/2009/07/024Gratieri, D.R., Peres, O.L.B., in preparationAbe, K., Hayato, Y., Iida, T., Search for matter-dependent atmospheric neutrino oscillations in Super-Kamiokande (2008) Physical Review D, 77, p. 6. , 10.1103/PhysRevD.77.052001 052001Rossi-Torres, F., Guzzo, M., De Holanda, P., Peres, O., Mass varying neutrinos in supernovae (2011) Physical Review D, 84 (5), p. 8. , 10.1103/PhysRevD.84.053010 053010Guzzo, M.M., Rossi-Torres, F., Neutrinos de massa variável (2010) Physicæ, 9, p. 9. , 10.5196/physicae.9.2Gonzalez-Garcia, M., De Holanda, P.C., Funchal, R.Z., Effects of environment dependence of neutrino mass versus solar and reactor neutrino data (2006) Physical Review D, 73 (3), p. 9. , 10.1103/PhysRevD.73.033008 033008Schwetz, T., Winter, W., Testing mass-varying neutrinos with reactor experiments (2006) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 633 (4-5), pp. 557-562. , DOI 10.1016/j.physletb.2005.12.052, PII S0370269305018599Barger, V., Marfatia, D., Whisnant, K., Confronting mass-varying neutrinos with MiniBooNE (2006) Physical Review D, 73 (1), p. 10. , 10.1103/PhysRevD.73.013005 013005Kaplan, D.B., Nelson, A.E., Weiner, N., Neutrino oscillations as a probe of dark energy (2004) Physical Review Letters, 93 (9). , 10.1103/PhysRevLett.93.091801 091801Afshordi, N., Zaldarriaga, M., Kohri, K., Instability of dark energy with mass-varying neutrinos (2005) Physical Review D, 72 (6), p. 10. , 065024Bassin, C., Laske, G., Masters, G., The current limits of resolution for surface wave tomography in North America (2000) Eos, Transactions American Geophysical Union, 81, pp. F897Giunti, C., Kim, C.W., (2007) Fundamentals of Neutrino Physics and Astrophysics, , 1st Oxford University Pres
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Updated Solution To The Solar Neutrino Problem Based On Non-standard Neutrino Interactions
No full textWe present an updated version of the solution to the solar neutrino problem based on non-standard flavor changing neutrino interactions (FCNI) and non-universal flavor diagonal neutrino interactions (FDNI). We find a good fit not only to the total rates measured by all solar neutrino experiments but also to the day-night and seasonal variations of the event rate, as well as the recoil electron energy spectrum measured by the SuperKamiokande collaboration. © 2001 Elsevier Science B.V.1001-36264Bergmann, S., Guzzo, M.M., De Holanda, P.C., Krastev, P.I., Nunokawa, H., (2000) Phys. Rev. D, 62, p. 073001. , (hep-ph/0004049)Cleveland, T.B., (1998) Astrophys. J., 496, p. 505. , (Homestake Collaboration)Hampel, W., (1999) Phys. Lett., 447, p. 127. , (GALLEX Collaboration)Abdurashitov, J.N., (1999) Phys. Rev. C, 60, p. 055801. , (SAGE Collaboration)Fukuda, Y., (1999) Phys. Rev. Lett., 82, p. 1810. , (SuperKamiokande Collaboration)Wolfenstein, L., (1978) Phys. Rev., 17, p. 2369Guzzo, M.M., Masiero, A., Petcov, S.T., (1991) Phys. Lett., 260, p. 154Barger, V., Phillips, R.J.N., Whisnant, K., (1991) Phys. Rev. D, 44, p. 1629Roulet, E., (1991) Phys. Rev. D, 44, p. 935Degl'Innocenti, S., Ricci, B., (1993) Mod. Phys. Lett., 8, p. 471Fogli, G.L., Lisi, E., (1994) Astroparticle Phys., 2, p. 91P.I. Krastev, J.N. Bahcall, FCNC solutions to the solar neutrino problem, , hep-ph/9703267Bergmann, S., (1998) Nucl. Phys., 515, p. 363. , [hep-ph/9707398]Resonant neutrino conversion induced by non-orthogonal massless neutrinos was first discussed by J.W.F. Valle in Phys. Lett. B 199, 432 (1987). However this mechanism can not induce a large effect on the solar neutrinos due to the stringent constraints on the model parametersBahcall, J.N., Basu, S., Pinsonneault, M.H., (1998) Phys. Lett., 433, p. 1. , see also J.N. Bahcall's home page, http://www.sns.ias.edu/ ∼jnbFogli, G.L., Lisi, E., Montanino, D., (1994) Phys. Rev. D, 49, p. 3226Fogli, G.L., Lisi, E., (1995) Astropart. Phys., 3, p. 185Gonzalez-Garcia, M.C., (1998) Phys. Rev. D, 58, p. 033004. , For recent analysis, see e.gGonzalez-Garcia, M.C., Nunokawa, H., Peres, O.L.G., Valle, J.W.F., (1999) Nucl. Phys., 543, p. 3. , [hep-ph/9807305]N. Fornengo, M.C. Gonzalez-Garcia, J.W.F. Valle, hep-ph/0002147Athanassopoulos, C., (1996) Phys. Rev. Lett., 77, p. 3082Athanassopoulos, C., (1998) Phys. Rev. Lett., 81, p. 1774. , (LSND Collaboration)Bergmann, S., Grossman, Y., (1999) Phys. Rev. D, 59, p. 093005. , [hep-ph/9809524]Bergmann, S., Grossman, Y., Pierce, D.M., (2000) Phys. Rev. D, 61, p. 53005. , [hep-ph/9909390
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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