Results 61 to 70 of about 79,462 (367)

Particle asymmetries in the early universe [PDF]

, 2010
The total lepton asymmetry $l=\sum_f l_f$ in our universe is only poorly constrained by theories and experiments. It might be orders of magnitudes larger than the observed baryon asymmetry $b\simeq {\cal O}(10^{-10})$, $|l|/b \leq {\cal O}(10^{9})$.
Boeckel, Campbell, Caprini, Casas, Dolgov, Green, Kahniashvili, Komatsu, Maik Stuke, March-Russell, McDonald, Pastor, Philipsen, Popa, Schwarz, Schwarz, Siegel, Simha, Stephanov, Wong   +19 more
core   +1 more source

SPONTANEOUS CP IN A SUSY THEORY OF FLAVOUR

String Phenomenology 2003, 2004
We present a model based on an SU(3) family symmetry providing a full description of quark and lepton masses and mixing angles. CP is spontaneously broken in the flavour sector reproducing the observed results of the Jarlskog invariant in the CKM mixing matrix.
Vives, O, Ross, G, Velasco-Sevilla, L
openaire   +2 more sources

Quarks at the modular S 4 cusp

Journal of High Energy Physics, 2023
We analyse the possibility of describing quark masses, mixing and CP violation in S 4 ′ $$ {S}_4^{\prime } $$ modular flavour models without flavons. We focus on the case where the closeness of the modulus to the point of residual ℤ 3 ST $$ {\mathbb{Z ...
I. de Medeiros Varzielas, M. Levy, J. T. Penedo, S. T. Petcov   +3 more
doaj   +1 more source

Portal Effective Theories. A framework for the model independent description of light hidden sector interactions [PDF]

Journal of High Energy Physics, 2021
We present a framework for the construction of portal effective theory (PETs) that couple effective field theories of the Standard Model (SM) to light hidden messenger fields.
C. Arina, Jan Hajer, P. Klose
semanticscholar   +1 more source

Can leptonic mixing matrix have a Wolfenstein form?

Journal of High Energy Physics, 2023
We analyze the possibility of the leptonic mixing matrix having a Wolfenstein form at the Grand Unified Theory scale. The renormalization group evolution of masses and mixing angles from the high scale to electroweak scale, in certain new physics ...
Ankur Panchal, G. Rajasekaran, Rahul Srivastava   +2 more
doaj   +1 more source

Fermion hierarchies in SU(5) grand unification from Γ 6 ′ $$ {\Gamma}_6^{\prime } $$ modular flavor symmetry

Journal of High Energy Physics, 2023
We construct an SU(5) grand unified model in which the hierarchies of the quark and lepton masses and mixing are explained by the Γ 6 ′ $$ {\Gamma}_6^{\prime } $$ modular flavor symmetry.
Yoshihiko Abe, Tetsutaro Higaki, Junichiro Kawamura, Tatsuo Kobayashi   +3 more
doaj   +1 more source

Goldstone bosons in effective theories with spontaneously broken flavour symmetry [PDF]

, 2010
The flavour symmetry of the Standard Model (SM) gauge sector is broken by the fermion Yukawa couplings. Promoting the Yukawa matrices to scalar spurion fields, one can break the flavour symmetry spontaneously by giving appropriate vacuum expectation ...
M. E. Albrecht, T. Feldmann, T. Mannel
semanticscholar   +1 more source

Minimal mixing of quarks and leptons in the SU(3) theory of flavour [PDF]

Nuclear Physics B, 2002
52 pages, LaTex, no figures; some typos corrected; journal ...
Chkareuli, J.L., Froggatt, C.D., Nielsen, H.B.   +2 more
openaire   +3 more sources

Minimal Flavour Violation: an effective field theory approach [PDF]

, 2002
We present a general analysis of extensions of the Standard Model which satisfy the criterion of Minimal Flavour Violation (MFV). We define this general framework by constructing a low-energy effective theory containing the Standard Model fields, with ...
A. Strumia, Abe, Abe, Abe, Abe, Adler, Adler, Adler, Ali, Ali, Ali, Ali, Ambrose, Arkani-Hamed, Arkani-Hamed, Arkani-Hamed, Aubert, Aubert, Aubert, Aubert, Babu, Banks, Barate, Barbieri, Berezhiani, Bergmann, Blazek, Bobeth, Buchalla, Buchalla, Buras, Buras, Buras, Buras, Burdman, Carena, Carena, Chankowski, Chen, Chetyrkin, Chetyrkin, Chivukula, Ciuchini, Ciuchini, Cohen, Cohen, Colangelo, D'Ambrosio, D'Ambrosio, Dedes, Degrassi, del Aguila, del Aguila, del Aguila, Delgado, Demir, Dimopoulos, Dine, Dine, Dumm, Falk, G. D'Ambrosio, G. Isidori, G.F. Giudice, Gambino, Giudice, Giudice, Grossman, Hall, Hall, Hamzaoui, Huang, Huang, Isidori, Kalinowski, Laplace, Peccei, Randall, Randall, Rattazzi, Yan   +80 more
core   +2 more sources

CKM substructure from the weak to the Planck scale

Journal of High Energy Physics, 2022
We look for relations among CKM matrix elements that are not consequences of the Wolfenstein parametrization. In particular, we search for products of CKM elements raised to integer powers that approximately equal 1.
Yuval Grossman, Ameen Ismail, Joshua T. Ruderman, Tien-Hsueh Tsai   +3 more
doaj   +1 more source