Outputs (2904)

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.

Standard Model Predictions for D0-oscillations and CP-violation (2011)
Presentation / Conference Contribution
Lenz, A., & Bobrowski, M. (2011). Standard Model Predictions for D0-oscillations and CP-violation. . https://doi.org/10.1142/s2010194511000651

Search for new physics in $B_s$ -mixing (2008)
Presentation / Conference Contribution
Lenz, A. J., & Peloso, M. (2008). Search for new physics in $B_s$ -mixing. In Continuous advances in QCD 2008 ; proceedings (70-78)

Charm mixing in the Standard Model (2010)
Presentation / Conference Contribution
Bobrowski, M., & Lenz, A. (2010). Charm mixing in the Standard Model.

In this talk we report on a study on the mixing of neutral charmed mesons and argue that, at the present stage, a CP violating weak phase of the order of some per mille can not be excluded in the Standard Model. It is shown how some, seemingly reason... Read More about Charm mixing in the Standard Model.

Theoretical update of $B$-Mixing and Lifetimes (2012)
Presentation / Conference Contribution
Lenz, A. (2012). Theoretical update of $B$-Mixing and Lifetimes.

We review the current status of theoretical predictions for mixing quantities and lifetimes in the B-sector. In particular, due to the first non-zero measurement of the decay rate difference in the neutral Bs-system,

Partonic description of soft high energy pp interactions (2012)
Presentation / Conference Contribution
and new physics. 12-16 September 2011, ECT*, Trento, Italy (162-175)

Threshold Pion Production at Large Momentum Transfers (2009)
Presentation / Conference Contribution
Braun, V., Ivanov, D. Y., Lenz, A., Peters, A., Tserruya, I., Gal, A., & Ashery, D. (2009). Threshold Pion Production at Large Momentum Transfers. In Eighteenth Particles and Nuclei International Conference, PANIC08, 9-14 November 2008, Eilat, Israel ; proceedings (294-296). https://doi.org/10.1016/j.nuclphysa.2009.05.006

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.

Constraints on fourth generation Majorana neutrinos (2010)
Presentation / Conference Contribution
Lenz, A., Pas, H., & Schalla, D. (2010). Constraints on fourth generation Majorana neutrinos. . https://doi.org/10.1088/1742-6596/259/1/012096

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 - evidence for a non-zero admixture of a fourth generation neutrino from fits... Read More about Constraints on fourth generation Majorana neutrinos.

Exclusive Higgs Production in a Triplet Scenario. (2010)
Presentation / Conference Contribution
Chaichian, M., Hoyer, P., Huitu, K., Khoze, V., & Pilkington, A. (2010). Exclusive Higgs Production in a Triplet Scenario. In M. Deile, D. d'Enterria, & A. De Roeck (Eds.), Proceedings of the 13th International Conference on Elastic and Diffractive Scattering (“Blois Workshop”) EDS 2009: Moving Forward into the LHC Era. 29th June - 3rd July 2009, CERN – Geneva, Switzerland (226-232)

In this talk, we discuss searching for the neutral Higgs boson of a triplet model in central exclusive production at the Large Hadron Collider. In a detailed Monte Carlo analysis, it is found that for appropriate values of the model parameters, an ex... Read More about Exclusive Higgs Production in a Triplet Scenario..

What HERA may provide? (2008)
Presentation / Conference Contribution
Jung, H., De Roeck, A., Bartels, J., Behnke, O., Blumlein, J., Brodsky, S., …Motyka, L. (2008). What HERA may provide?. In DIS 2008 Proceedings of the XVI International Workshop on Deep-Inelastic Scattering and Related Topics. https://doi.org/10.3360/dis.2008.17

The theoretical status of B¯ − B-mixing and lifetimes of heavy hadrons (2008)
Presentation / Conference Contribution
Lenz, A. (2008). The theoretical status of B¯ − B-mixing and lifetimes of heavy hadrons. International Journal of Modern Physics A, 23(21), 3321-3328. https://doi.org/10.1142/s0217751x08042055

In this talk we review the theoretical status of the lifetime ratios of heavy hadrons and of the B-mixing quantities ΔMs, ΔΓs and φs. While ΔMs and ΔΓs suffer from large uncertainties due to the badly known decay constants, the ratio ΔΓs/ΔMs can be d... Read More about The theoretical status of B¯ − B-mixing and lifetimes of heavy hadrons.

Central Exclusive Production of BSM Higgs bosons at the LHC. (2008)
Presentation / Conference Contribution
Heinemeyer, S., Khoze, V., Ryskin, M., Tasevsky, M., & Weiglein, G. (2008). Central Exclusive Production of BSM Higgs bosons at the LHC. In J. Bartels, K. Borras, G. Gustafson, H. Jung, K. Kutak, S. Levonian, & J. Mnich (Eds.), ISMD08, September 15-20, 2008, DESY, Hamburg, Germany (338-343). https://doi.org/10.3204/desy-proc-2009-01/60

The prospects for central exclusive diffractive (CED) production of MSSM Higgs bosons at the LHC are reviewed. These processes can provide important information on the CP-even Higgs bosons, allowing to probe interesting regions of the mA–tan β parame... Read More about Central Exclusive Production of BSM Higgs bosons at the LHC..

Exclusive production of the BSM Higgs bosons at the LHC (2011)
Presentation / Conference Contribution
Heinemeyer, S., Khoze, V., Ryskin, M., Tasevsky, M., & Weiglein, G. (2011). Exclusive production of the BSM Higgs bosons at the LHC. In 19th International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2011), Newport News, Virginia, April 11-15, 2011

We review the prospects for Central Exclusive Production (CEP) of BSM Higgs bosons at the LHC using forward proton detectors proposed to be installed at 220 m and 420 m from the ATLAS and/ or CMS. Results are presented for MSSM in standard benchmark... Read More about Exclusive production of the BSM Higgs bosons at the LHC.

Mixing and lifetimes of $b-$hadrons (2008)
Presentation / Conference Contribution
Lenz, A. J. (2008). Mixing and lifetimes of $b-$hadrons. . https://doi.org/10.1063/1.2965074

We review the status of mixing and lifetimes of b‐hadrons. We will show that ΔΓ/ΔM, asl and φ are better suited to search for new physics effects than ΔM alone, because of our poor knowledge of the decay constants. The theoretical precision in the de... Read More about Mixing and lifetimes of $b-$hadrons.

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.

Rapidity gap survival probability and total cross sections. (2009)
Presentation / Conference Contribution
Martin, A., Khoze, V., & Ryskin, M. (2009). Rapidity gap survival probability and total cross sections. In H. Jung, & A. De Roeck (Eds.), Proceedings of the workshop HERA and the LHC: 2nd workshop on the implications of HERA for LHC physics, 2006 - 2008, Hamburg - Geneva (488-494)

We discuss recent calculations of the survival probability of the large rapidity gaps in exclusive processes of the type pp → p + A + p at high energies. Absorptive or screening effects are important, and one consequence is that the total cross secti... Read More about Rapidity gap survival probability and total cross sections..

Short distance D-Dbar mixing (2012)
Presentation / Conference Contribution
Bobrowski, M., Lenz, A., & Rauh, T. (2012). Short distance D-Dbar mixing.

We review the status of Standard Model predictions for lifetimes and mixing rates of charmed mesons. It is shown that the short distance approach is able to reproduce τ (D+)/τ (D0) at leading order in the 1/mc expansion. SU(3) violating effects from... Read More about Short distance D-Dbar mixing.

Working Group on Diffraction: Executive Summary. (2009)
Presentation / Conference Contribution
Arneodo, M., Diehl, M., Khoze, V., & Newman, P. (2009). Working Group on Diffraction: Executive Summary. In H. Jung, & A. De Roeck (Eds.), Proceedings of the workshop HERA and the LHC: 2nd workshop on the implications of HERA for LHC physics, 2006 - 2008, Hamburg - Geneva (397-400)

We give a brief overview of the topics covered in the working group on diffraction.

Exclusive Production of the MSSM Higgs Bosons at the LHC (2012)
Presentation / Conference Contribution
Heinemeyer, S., Khoze, V. A., Tasevsky, M., & Weiglein, G. (2012). Exclusive Production of the MSSM Higgs Bosons at the LHC. In DIS 2012: 20th International Workshop on Deep-Inelastic Scattering and Related Subjects. 26-30 March 2012, University of Bonn, Germany. https://doi.org/10.3204/desy-proc-2012-02/262

We review the prospects for Central Exclusive Production (CEP) of BSM Higgs bosons at the LHC using forward proton detectors proposed to be installed at 220 m and 420 m from the ATLAS and/ or CMS. Results are presented for MSSM in standard benchmark... Read More about Exclusive Production of the MSSM Higgs Bosons at the LHC.