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Exclusive production of soft pions in DIS. (2009)
Journal Article
Braun, V., Ivanov, D. Y., Lenz, A., & Peters, A. (2009). Exclusive production of soft pions in DIS. Modern Physics Letters A, 24(35n37), 2931-2939. https://doi.org/10.1142/s0217732309001145

We consider pion electroproduction close to threshold for Q2 in the region 1–10 GeV2 on a nucleon target. The momentum transfer dependence of the S-wave multipoles at threshold, E0+ and L0+, is calculated in the chiral limit using light-cone sum rule... Read More about Exclusive production of soft pions in DIS..

Testing the new CP phase in a Supersymmetric Model with Q(6) Family Symmetry by B(s) Mixing (2009)
Journal Article
Kawashima, K., Kubo, J., & Lenz, A. (2009). Testing the new CP phase in a Supersymmetric Model with Q(6) Family Symmetry by B(s) Mixing. Physics Letters B, 681(1), 60-67. https://doi.org/10.1016/j.physletb.2009.09.064

The new contribution to the non-diagonal matrix element M12 of the neutral Bs meson system is investigated in a supersymmetric extension of the standard model based on the discrete Q6 family symmetry. We assume that CP is explicitly, but softly broke... Read More about Testing the new CP phase in a Supersymmetric Model with Q(6) Family Symmetry by B(s) Mixing.

Electroproduction of the N*(1535) resonance at large momentum transfer. (2009)
Journal Article
Braun, V., Göckeler, M., Horsley, R., Kaltenbrunner, T., Lenz, A., Nakamura, Y., …Zanotti, J. (2009). Electroproduction of the N*(1535) resonance at large momentum transfer. Physical Review Letters, 103(7), Article 072001. https://doi.org/10.1103/physrevlett.103.072001

We report on the first lattice calculation of light-cone distribution amplitudes of the N∗(1535) resonance, which are used to calculate the transition form factors at large momentum transfers using light-cone sum rules. In the region Q2>2  GeV2, wher... Read More about Electroproduction of the N*(1535) resonance at large momentum transfer..

How much space is left for a new family of fermions? (2009)
Journal Article
Bobrowski, M., Lenz, A., Riedl, J., & Rohrwild, J. (2009). How much space is left for a new family of fermions?. Physical Review D, 79(11), Article 113006. https://doi.org/10.1103/physrevd.79.113006

We perform an exploratory study of the allowed parameter range for the CKM-like mixing of hypothetical quarks of a fourth generation. As experimental constraints we use the tree-level determinations of the 3×3 Cabibbo-Kobayashi-Maskawa (CKM) elements... Read More about How much space is left for a new family of fermions?.

Nucleon distribution amplitudes and their application to nucleon form factors and the N→Δ transition at intermediate values of Q2 (2009)
Journal Article
Lenz, A., Göckeler, M., Kaltenbrunner, T., & Warkentin, N. (2009). Nucleon distribution amplitudes and their application to nucleon form factors and the N→Δ transition at intermediate values of Q2. Physical Review D, 79(9), https://doi.org/10.1103/physrevd.79.093007

We compare a recent lattice determination of the nucleon distribution amplitudes with other approaches and models. We study the nucleon distribution amplitudes up to twist 6 in next-to-leading conformal spin and we also investigate conformal d-wave c... Read More about Nucleon distribution amplitudes and their application to nucleon form factors and the N→Δ transition at intermediate values of Q2.