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Triangle relation of dark matter, EDM and CP violation in B0 mixing in a Sspersymmetric Q6 model. (2011)
Journal Article
Kaburaki, Y., Konya, K., Kubo, J., & Lenz, A. (2011). Triangle relation of dark matter, EDM and CP violation in B0 mixing in a Sspersymmetric Q6 model. Physical Review D, 84(1), https://doi.org/10.1103/physrevd.84.016007

We consider a recently proposed supersymmetric model based on the discrete Q6 family group. Because of the family symmetry and spontaneous CP violation, the electric dipole moment, the CP violation in the mixing of the neutral mesons, and the dark ma... Read More about Triangle relation of dark matter, EDM and CP violation in B0 mixing in a Sspersymmetric Q6 model..

Fourth generation Majorana neutrinos. (2011)
Journal Article
Lenz, A., Pas, H., & Schalla, D. (2011). Fourth generation Majorana neutrinos. Physical Review D, 85(7), https://doi.org/10.1103/physrevd.85.075025

We investigate the possibility of a fourth sequential generation in the lepton sector. Assuming neutrinos to be Majorana particles and starting from a recent—albeit weak—hint for a nonzero admixture of a fourth generation neutrino from fits to weak l... Read More about Fourth generation Majorana neutrinos..

Anatomy of new physics in B-B¯¯¯ mixing. (2011)
Journal Article
Lenz, A., Nierste, U., Charles, J., Descotes-Genon, S., Jantsch, A., Kaufhold, C., …T'Jampens, S. (2011). Anatomy of new physics in B-B¯¯¯ mixing. Physical Review D, 83(3), Article 036004. https://doi.org/10.1103/physrevd.83.036004

We analyze three different new physics scenarios for ΔF=2 flavor-changing neutral currents in the quark sector in the light of recent data on neutral-meson mixing. We parametrize generic new physics contributions to Bq−B¯¯¯q mixing, q=d, s, in terms... Read More about Anatomy of new physics in B-B¯¯¯ mixing..

CKM theory status (2011)
Presentation / Conference Contribution
Lenz, A., & Soffer, A. (2011). CKM theory status.

In this talk I review the current status of the CKM matrix. A special emphasis is also given to several discrepancies between experiments and the standard model at the level of about three standard deviations. Recent results that appeared after FPCP2... Read More about CKM theory status.

Summary of WG4: 'Lifetime, Mixing and Weak Mixing Phase in Charm and Beauty, Including Direct Determination of V_tx (2011)
Presentation / Conference Contribution
Kreps, M., Lenz, A., & Leroy, O. (2011). Summary of WG4: 'Lifetime, Mixing and Weak Mixing Phase in Charm and Beauty, Including Direct Determination of V_tx. In 6th International Workshop on the CKM Unitarity Triangle, CKM 2010, 6-10 September 2010, University of Warwick ; proceedings

We present the summary of the Working Group on lifetimes, mixing and weak mixing phases in charm and beauty mesons at the CKM 2010 workshop. In the past year or so good progress was achieved on both experimental and theoretical sides. While this yiel... Read More about Summary of WG4: 'Lifetime, Mixing and Weak Mixing Phase in Charm and Beauty, Including Direct Determination of V_tx.

Numerical Updates of Lifetimes and Mixing Parameters of B Mesons (2011)
Presentation / Conference Contribution
Lenz, A., Nierste, U., & Gershon, T. (2011). Numerical Updates of Lifetimes and Mixing Parameters of B Mesons. In 6th International Workshop on the CKM Unitarity Triangle, CKM 2010, 6-10 September 2010, University of Warwick ; proceedings

We update the Standard-Model predictions for several quantities related to Bs−B¯s and Bd−B¯d mixing. The mass and width differences in the Bs system read ΔMSMs=(17.3±2.6)ps−1 and ΔΓSMs=(0.087±0.021)ps−1, respectively. The CP asymmetries in flavour-sp... Read More about Numerical Updates of Lifetimes and Mixing Parameters of B Mesons.