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Journal articles on the topic 'Leptonic CP Violation'

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Author: Grafiati

Published: 14 March 2023

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1

LIU, YONG, and UTPAL SARKAR. "CP VIOLATION IN NEUTRINO MIXING MATRIX AND LEPTOGENESIS." Modern Physics Letters A 16, no. 09 (March 21, 2001): 603–13. http://dx.doi.org/10.1142/s0217732301003528.

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The CP violation required in leptogenesis may have different origin, but in an effective theory they are all related to the rephasing invariant CP violating measures in the mixing matrix of the leptonic sector. We point out that with our present knowledge of the mixing angles it is possible to estimate the maximum allowed value for all the rephasing invariant measures of CP violation in the leptonic sector. In the effective three-generation scenario there are three CP violating rephasing invariant measures. We show that only one rephasing invariant measure enters the lepton number conserving processes while the other two enter the lepton number violating processes. In the bimaximal mixing case, the lepton number conserving measure of CP violation vanishes while the two lepton number violating rephasing invariant measures of CP violation remain nonzero, which could contribute to the lepton asymmetry of the universe.

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2

Maalampi, J., and K. Mursula. "Leptonic CP-violation and mirror leptons." Nuclear Physics B 269, no. 1 (May 1986): 109–18. http://dx.doi.org/10.1016/0550-3213(86)90368-8.

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3

Petcov, S. T. "Leptonic CP violation and leptogenesis." International Journal of Modern Physics A 29, no. 11n12 (April 25, 2014): 1430028. http://dx.doi.org/10.1142/s0217751x14300282.

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The phenomenology of 3-neutrino mixing, the current status of our knowledge about the 3-neutrino mixing parameters, including the absolute neutrino mass scale, and of the Dirac and Majorana CP violation in the lepton sector, are reviewed. The problems of CP violation in neutrino oscillations and of determining the nature — Dirac or Majorana — of massive neutrinos, are discussed. The seesaw mechanism of neutrino mass generation and the related leptogenesis scenario of generation of the baryon asymmetry of the universe, are considered. The results showing that the CP violation necessary for the generation of the baryon asymmetry of the universe in leptogenesis can be due exclusively to the Dirac and/or Majorana CP-violating phase(s) in the neutrino mixing matrix U, are briefly reviewed.

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4

Hagedorn, C. "Leptonic CP violation theory." Journal of Physics: Conference Series 888 (September 2017): 012027. http://dx.doi.org/10.1088/1742-6596/888/1/012027.

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5

NASRI, S., J. SCHECHTER, and S. MOUSSA. "STUDY OF LEPTONIC CP VIOLATION." International Journal of Modern Physics A 19, no. 31 (December 20, 2004): 5367–75. http://dx.doi.org/10.1142/s0217751x04022608.

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The "complementary" Ansatz, Tr (Mν)=0, where Mν is the prediagonal neutrino mass matrix, seems a plausible approximation for capturing in a self contained way some of the content of Grand Unification. We study its consequences in the form of relations between the neutrino masses and CP violation phases.

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6

Grossman, Yuval. "Leptonic flavor and CP violation." Pramana 62, no. 2 (February 2004): 269–81. http://dx.doi.org/10.1007/bf02705088.

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7

Zeen Devi, H. "Correlations between low energy leptonic CP violation and leptogenesis in the light of recent experiments." International Journal of Modern Physics A 29, no. 20 (August 6, 2014): 1450104. http://dx.doi.org/10.1142/s0217751x14501048.

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Leptogenesis is the most favorable mechanism for generating the observed baryon asymmetry of the universe (BAU) which implies CP violation in the high energy scale. The low energy leptonic CP violation is expected to be observed in the neutrino oscillations and 0ν2β decay experiments. Generally, it is not possible to connect both the CP violations. Here we revisit the issue of connecting the two in flavored leptogenesis scenario within the Type I seesaw in the light of recent neutrino oscillation and Planck data. With the recent precise measurements of θ13 and BAU, we are able to find new correlations between the low and high energy CP violating phases when leptogenesis occurs at temperature between 109 to 1012 GeV and there is no contribution to CP violation from the heavy neutrino sector.

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8

Ahuja, Gulsheen, and Samandeep Sharma. "Texture zero mass matrices and CP violation." International Journal of Modern Physics A 32, no. 16 (June 8, 2017): 1742005. http://dx.doi.org/10.1142/s0217751x17420052.

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Within the Standard Model, using the facility of making Weak Basis transformations, attempt has been made to examine the most general mass matrices within the texture zero approach. For the case of quarks, interestingly, one finds a particular set of texture four zero quark mass matrices emerging out to be a unique viable option for the description of quark mixing data as well as for accommodation of CP violation. Similarly, general lepton mass matrices, essentially considered as texture zero mass matrices, yield interesting bounds on the CP violating Jarlskog’s rephasing invariant parameter in the leptonic sector.

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9

Tandean, Jusak, and G. Valencia. "CP violation in non-leptonic decays." Physics Letters B 451, no. 3-4 (April 1999): 382–87. http://dx.doi.org/10.1016/s0370-2693(99)00173-2.

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10

Minakata, Hisakazu, and Shinji Watanabe. "Solar neutrinos and leptonic CP violation." Physics Letters B 468, no. 3-4 (December 1999): 256–60. http://dx.doi.org/10.1016/s0370-2693(99)01224-1.

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11

Fernandez-Martinez, E. "Future prospects for leptonic CP violation." Nuclear and Particle Physics Proceedings 265-266 (August 2015): 177–79. http://dx.doi.org/10.1016/j.nuclphysbps.2015.06.044.

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12

Petcov, S. T. "Theory prospective on leptonic CP violation." Nuclear Physics B 908 (July 2016): 279–301. http://dx.doi.org/10.1016/j.nuclphysb.2016.02.032.

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13

Romanino, Andrea. "Experimental implications of leptonic CP-violation." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 451, no. 1 (August 2000): 42–50. http://dx.doi.org/10.1016/s0168-9002(00)00371-5.

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14

Shafi, Qaisar, and Zurab Tavartkiladze. ", rare decays and leptonic CP violation." Nuclear Physics B 772, no. 1-2 (June 2007): 133–49. http://dx.doi.org/10.1016/j.nuclphysb.2007.02.022.

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15

Branco, G. C., M. N. Rebelo, and J. W. F. Valle. "Leptonic CP violation with massless neutrinos." Physics Letters B 225, no. 4 (July 1989): 385–92. http://dx.doi.org/10.1016/0370-2693(89)90587-x.

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16

Geng, C. Q. "Leptonic CP violation in leptoquark models." Zeitschrift f�r Physik C Particles and Fields 48, no. 2 (June 1990): 279–82. http://dx.doi.org/10.1007/bf01554476.

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17

Gupta, Manmohan, Monika Randhawa, and Mandip Singh. "Neutrino experiments: Hierarchy, CP, CPT." International Journal of Modern Physics A 31, no. 20n21 (July 27, 2016): 1630030. http://dx.doi.org/10.1142/s0217751x16300301.

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We present an overview of our recent investigations regarding the prospects of ongoing neutrino experiments as well as future experiments in determining few of the most important unknowns in the field of neutrino physics, specifically the neutrino mass ordering and leptonic CP-violation phase. The effect of matter oscillations on the neutrino oscillation probabilities has been exploited in resolving the degeneracy between the neutrino mass ordering and the CP violation phase in the leptonic sector. Further, we estimate the extent of extrinsic CP and CPT violation in the experiments with superbeams as well as neutrino factories.

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18

Epifanov, Denis. "Experimental review of τ lepton studies at the B factories." EPJ Web of Conferences 218 (2019): 05001. http://dx.doi.org/10.1051/epjconf/201921805001.

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Recent results of a high-statistics τ lepton studies at B factories are reported. Reviewed are the measurements of Michel parameters in leptonic and radiative leptonic τ decays at Belle, as well as the measurement of the branching fractions of the radiative leptonic τ decays at BABAR. Searches for CP symmetry violation in hadronic decays with $ \mathop K\nolimits_S^0 $ are also briefly discussed.

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19

Liu, Zhuo, and Yue-Liang Wu. "Leptonic CP violation and Wolfenstein parametrization for lepton mixing." Physics Letters B 733 (June 2014): 226–32. http://dx.doi.org/10.1016/j.physletb.2014.04.049.

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20

Félix-Beltrán, O., J. E. Barradas-Guevara J. E. Barradas-Guevara, and F. González-Canales. "Charged Lepton Masses as a Possible CPV Source." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 8, no. 2 (February 10, 2021): 161–68. http://dx.doi.org/10.15415/jnp.2021.82021.

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We realize a model-independent study of the so-called Tri-Bi-Maximal pattern of leptonic flavor mixing. Different charged lepton mass matrix textures are studied. In particular, we are interested in those textures with a minimum number of parameters and that are able to reproduce the current experimental data on neutrino oscillation. The textures studied here form an equivalent class with two texture zeros. We obtain a Tri-Bi-Maximal pattern deviation in terms of the charged leptons masses, leading to a reactor angle and three CP violation phases non-zero. These lastest are one CP violation phase Dirac-like and two phases Majorana-like. Also, we can test the phenomenological implications of the numerical values obtained for the mixing angles and CP violation phases, on the neutrinoless double beta decay, and in the present and upcoming experiments on long-base neutrino oscillation, such as T2K, NOvA, and DUNE.

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21

PETCOV, S. T. "NEUTRINO MIXING, LEPTONIC CP VIOLATION, THE SEESAW MECHANISM AND BEYOND." International Journal of Modern Physics A 25, no. 23 (September 20, 2010): 4325–37. http://dx.doi.org/10.1142/s0217751x1005069x.

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The phenomenology of 3-neutrino mixing and of the related Dirac and Majorana leptonic CP violation is reviewed. The leptogenesis scenario of generation of the baryon asymmetry of the Universe, which is based on the see-saw mechanism of neutrino mass generation, is considered. The results showing that the CP violation necessary for the generation of the baryon asymmetry of the Universe in leptogenesis can be due exclusively to the Dirac and/or Majorana CP-violating phase(s) in the neutrino mixing matrix U are briefly reviewed.

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22

AHUJA, GULSHEEN. "EXPLORING THE LIKELIHOOD OF CP VIOLATION IN NEUTRINO OSCILLATIONS." Modern Physics Letters A 26, no. 34 (November 10, 2011): 2597–603. http://dx.doi.org/10.1142/s0217732311036905.

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In view of the latest T2K and MINOS observations regarding the mixing angle s13, we have explored the possibility of the existence of CP violation in the leptonic sector. Using hints from the construction of the "db" unitarity triangle in the quark sector, we have made an attempt to construct the "ν1⋅ν3" leptonic unitarity triangle, suggesting a good possibility of having nonzero CP violation.

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23

MENA, OLGA. "UNVEILING NEUTRINO MIXING AND LEPTONIC CP VIOLATION." Modern Physics Letters A 20, no. 01 (January 10, 2005): 1–17. http://dx.doi.org/10.1142/s0217732305016269.

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We review the present understanding of neutrino masses and mixings, discussing what are the unknowns in the three-family oscillation scenario. Despite the anticipated success coming from the planned long baseline neutrino experiments in unraveling the leptonic mixing sector, there are two important unknowns which may remain obscure: the mixing angle θ13 and the CP-phase δ. The measurement of these two parameters has led us to consider the combination of superbeams and neutrino factories as the key to unveil the neutrino oscillation picture.

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24

Branco, Gustavo C., and M. N. Rebelo. "Leptonic CP violation and neutrino mass models." New Journal of Physics 7 (April 2, 2005): 86. http://dx.doi.org/10.1088/1367-2630/7/1/086.

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25

Marciano, William J., and Zohreh Parsa. "Intense Neutrino Beams and Leptonic CP Violation." Nuclear Physics B - Proceedings Supplements 221 (December 2011): 166–72. http://dx.doi.org/10.1016/j.nuclphysbps.2011.03.114.

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26

Burguet Castell, J., M. B. Gavela, J. J. Gómez Cadenas, P. Hernández, and O. Mena. "On the measurement of leptonic CP violation." Nuclear Physics B 608, no. 1-2 (August 2001): 301–18. http://dx.doi.org/10.1016/s0550-3213(01)00248-6.

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27

Fernández-Martínez, E., M. B. Gavela, J. López-Pavón, and O. Yasuda. "CP-violation from non-unitary leptonic mixing." Physics Letters B 649, no. 5-6 (June 2007): 427–35. http://dx.doi.org/10.1016/j.physletb.2007.03.069.

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28

Dasgupta, Basudeb, and Alexei Yu Smirnov. "Leptonic CP violation phases, quark–lepton similarity and seesaw mechanism." Nuclear Physics B 884 (July 2014): 357–78. http://dx.doi.org/10.1016/j.nuclphysb.2014.05.001.

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29

Wildner, E., E. Baussan, M. Blennow, M. Bogomilov, A. Burgman, E. Bouquerel, C. Carlile, et al. "The Opportunity Offered by the ESSnuSB Project to Exploit the Larger Leptonic CP Violation Signal at the Second Oscillation Maximum and the Requirements of This Project on the ESS Accelerator Complex." Advances in High Energy Physics 2016 (2016): 1–16. http://dx.doi.org/10.1155/2016/8640493.

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The European Spallation Source (ESS), currently under construction in Lund, Sweden, is a research center that will provide, by 2023, the world’s most powerful neutron source. The average power of the proton linac will be 5 MW. Pulsing this linac at higher frequency will make it possible to raise the average total beam power to 10 MW to produce, in parallel with the spallation neutron production, a very intense neutrino Super Beam of about 0.4 GeV mean neutrino energy. This will allow searching for leptonic CP violation at the second oscillation maximum where the sensitivity is about 3 times higher than at the first. The ESS neutrino Super Beam, ESSnuSB operated with a 2.0 GeV linac proton beam, together with a large underground Water Cherenkov detector located at 540 km from Lund, will make it possible to discover leptonic CP violation at 5σ significance level in 56% (65% for an upgrade to 2.5 GeV beam energy) of the leptonic CP-violating phase range after 10 years of data taking, assuming a 5% systematic error in the neutrino flux and 10% in the neutrino cross section. The paper presents the outstanding physics reach possible for CP violation with ESSnuSB obtainable under these assumptions for the systematic errors. It also describes the upgrade of the ESS accelerator complex required for ESSnuSB.

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30

Gupta, Manmohan, Gulsheen Ahuja, Nikhila Awasthi, and Aakriti Bagai. "Revisiting CP violation in the CKM paradigm." International Journal of Modern Physics A 33, no. 31 (November 10, 2018): 1844033. http://dx.doi.org/10.1142/s0217751x18440335.

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The implications of precision CKM measurements have been examined on the CKM paradigm as well as the CP violating parameters. Similarly, the implications of the precision neutrino oscillations measurements for the Dirac-like CP violating phase in the leptonic sector have been investigated.

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31

BABA, TEPPEI. "WHAT DOES μ - τ SYMMETRY IMPLY ABOUT LEPTONIC CP VIOLATION?" International Journal of Modern Physics E 16, no. 05 (June 2007): 1373–81. http://dx.doi.org/10.1142/s0218301307006733.

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The μ - τ symmetry can reproduce the consistent results with experimental data of θ13, and θ23 (θ13, and θ23 respectively denote the νe - ντ, and νμ - ντ, mixing angles). However, we can not address the issue of the leptonic CP violation in μ - τ symmetric models. So we add the μ - τ symmetry breaking part to include the CP violation. We characterize leptonic CP violation in terms of three phases, where one is conventional phase δ and others are additional phases ρ and γ. These δ, ρ and γ are, respectively, the phases of νe - ντ, νe - νμ and νμ - ντ mixings. The ρ and γ are redundant but the effect of ρ remains in the leptonic CP violation which is characterized by δ + ρ. The δ arises from the μ - τ symmetry breaking part of the Meμ and Meτ while ρ arises from of μ - τ symmetric part of the Meμ and Meτ, where Mij stands for ij (i,j = e,μ,τ) element of M(= [Formula: see text] for Mν being a flavor neutrino mass matrix). Moreover, θ23 can be exactly estimated to be: [Formula: see text] ( sin θ ∝ sin θ13 cos (δ + ρ)[Formula: see text], sin ϕ ∝ Mμμ - Mττ, where [Formula: see text] is the solar neutrino mass difference squared). The conditions of maximal atmospheric neutrino mixing are given by [Formula: see text] and Mμμ = Mττ,which indicate maximal Dirac CP violation.

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32

JORA, RENATA, JOSEPH SCHECHTER, and M. NAEEM SHAHID. "AN ANALYTICAL TREATMENT OF THE NEUTRINO MASSES AND MIXINGS." Modern Physics Letters A 28, no. 39 (December 16, 2013): 1350184. http://dx.doi.org/10.1142/s0217732313501848.

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We obtain analytical formulas which connect the neutrino masses and the leptonic mixing matrix with the entries in the mass matrix for the approximation in which the charged lepton mixing matrix is the unit matrix. We also extract the CP violation phase and determine the conditions in which this is present.

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33

Boschi, T. "Sensitivity to leptonic CP violation at Hyper-Kamiokande." Journal of Physics: Conference Series 1468 (February 2020): 012203. http://dx.doi.org/10.1088/1742-6596/1468/1/012203.

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34

Marciano, William J. "Long baseline neutrino oscillations and leptonic CP violation." Nuclear Physics B - Proceedings Supplements 138 (January 2005): 370–75. http://dx.doi.org/10.1016/j.nuclphysbps.2004.11.085.

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35

Petcov, S. T. "Dirac and Majorana Leptonic CP-Violation and Leptogenesis." Nuclear Physics B - Proceedings Supplements 168 (June 2007): 322–27. http://dx.doi.org/10.1016/j.nuclphysbps.2007.02.031.

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36

Burguet Castell, J., and O. Mena. "Leptonic CP Violation measurement at the neutrino factory." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 503, no. 1-2 (May 2003): 199–204. http://dx.doi.org/10.1016/s0168-9002(03)00673-9.

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37

Petcov, S. T. "Dirac and Majorana leptonic CP-violation and leptogenesis." Journal of Physics: Conference Series 120, no. 2 (July 1, 2008): 022006. http://dx.doi.org/10.1088/1742-6596/120/2/022006.

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38

Valle, José W. F. "Status and implications of neutrino masses: A brief panorama." International Journal of Modern Physics A 30, no. 13 (May 4, 2015): 1530034. http://dx.doi.org/10.1142/s0217751x15300343.

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With the historic discovery of the Higgs boson our picture of particle physics would have been complete were it not for the neutrino sector and cosmology. I briefly discuss the role of neutrino masses and mixing upon gauge coupling unification, electroweak breaking and the flavor sector. Time is ripe for new discoveries such as leptonic CP violation, charged lepton flavor violation and neutrinoless double beta decay. Neutrinos could also play a role in elucidating the nature of dark matter and cosmic inflation.

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39

Pich, Antonio, I. Boyko, D. Dedovich, and I. I. Bigi. "Chapter 29 Tau Decays." International Journal of Modern Physics A 24, supp01 (May 2009): 715–37. http://dx.doi.org/10.1142/s0217751x09046746.

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40

Safir, A. Salim. "Non-leptonic B-decays, CP violation & the UT." Nuclear Physics B - Proceedings Supplements 152, no. 1 (February 2006): 154–57. http://dx.doi.org/10.1016/j.nuclphysbps.2005.08.029.

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41

Girardi, I., S. T. Petcov, Alexander J. Stuart, and A. V. Titov. "Leptonic Dirac CP violation predictions from residual discrete symmetries." Nuclear Physics B 902 (January 2016): 1–57. http://dx.doi.org/10.1016/j.nuclphysb.2015.10.020.

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42

Smirnov, M. V., Zh J. Hu, S. J. Li, and J. J. Ling. "The possibility of leptonic CP-violation measurement with JUNO." Nuclear Physics B 931 (June 2018): 437–45. http://dx.doi.org/10.1016/j.nuclphysb.2018.05.003.

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43

Sanda, A. I. "Non-leptonic two-body B decays and CP violation." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 462, no. 1-2 (April 2001): 39–43. http://dx.doi.org/10.1016/s0168-9002(01)00066-3.

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44

Branco, G. C., R. González Felipe, and F. R. Joaquim. "A new bridge between leptonic CP violation and leptogenesis." Physics Letters B 645, no. 5-6 (February 2007): 432–36. http://dx.doi.org/10.1016/j.physletb.2006.12.060.

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45

Chen, Peng, Gui-Jun Ding, Felix Gonzalez-Canales, and J. W. F. Valle. "Generalized μ – τ reflection symmetry and leptonic CP violation." Physics Letters B 753 (February 2016): 644–52. http://dx.doi.org/10.1016/j.physletb.2015.12.069.

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46

Branco, G. C., L. Lavoura, and M. N. Rebelo. "Majorana neutrinos and CP violation in the leptonic sector." Physics Letters B 180, no. 3 (November 1986): 264–68. http://dx.doi.org/10.1016/0370-2693(86)90307-2.

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47

MINAKATA, HISAKAZU. "NEUTRINOS: LOOKING FORWARD TO THE FUTURE." International Journal of Modern Physics E 16, no. 05 (June 2007): 1313–29. http://dx.doi.org/10.1142/s0218301307006691.

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I discuss some aspects of future prospects of the experimental exploration of the unknowns in the neutrino mass pattern and the lepton flavor mixing. I start from measuring θ13 by reactors and accelerators as a prerequisite for proceeding to search for leptonic CP violation. I then discuss how CP violation can be uncovered, and how the neutrino mass hierarchy can be determined. I do these by resolving so called the "parameter degeneracy" which is required anyway if one wants to seek precision measurement of the lepton mixing parameters. As a concrete setting for resolving the degeneracy I use the Tokai-to-Kamioka-Korea two detector complex which receives neutrino superbeam from J-PARC, which is sometimes called as "T2KK". It is shown that T2KK is able to resolve all the eight-fold parameter degeneracy in a wide range of the lepton mixing parameters. Some alternative ways of measuring the unknowns are also briefly mentioned.

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48

NASRI, SALAH. "IMPLICATIONS OF μ ↔ τ SYMMETRY ON NEUTRINOS AND LEPTOGENESIS." International Journal of Modern Physics A 20, no. 27 (October 30, 2005): 6258–67. http://dx.doi.org/10.1142/s0217751x05029289.

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We discuss a model based on μ ↔ τ symmetry acting in the lepton sector, which leads to maximal atmospheric mixing angle and θ13 = 0. We show that in the symmetric limit the lepton asymmetry ∊l of the universe can be given in a simple form in terms of the neutrino oscillation parameters. We also find that for the case of two right handed neutrinos ∊l, constrain the symmetry breaking parameter θ13 to be in range 0.1 to 0.2 depending on the leptonic CP violation phase.

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49

PASCOLI, SILVIA. "THE CONNECTION BETWEEN LOW-ENERGY LEPTONIC CP-VIOLATION AND LEPTOGENESIS." Modern Physics Letters A 20, no. 07 (March 7, 2005): 477–90. http://dx.doi.org/10.1142/s0217732305016804.

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Within the context of the seesaw mechanism, we review the possible connection between the CP-violating phases which appear in the lepton unitary mixing matrix and are measurable in neutrino oscillations and other low-energy processes, with the ones which play a role in the generation of the baryon asymmetry of the universe through the leptogenesis mechanism.

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50

Farzan, Yasaman, and Alexei Yu Smirnov. "Leptonic CP violation: zero, maximal or between the two extremes." Journal of High Energy Physics 2007, no. 01 (January 15, 2007): 059. http://dx.doi.org/10.1088/1126-6708/2007/01/059.

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