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Reader in the Department of PhysicsOC110+44 (0) 191 33 43814
Professor in the Centre for Particle TheoryOC121+44 (0) 191 33 43814
Deputy Director in the Institute for Particle Physics PhenomenologyOC110+44 (0) 191 33 43814

Research interests

  • Particle Physics (Flavour Physics, CP violation, New Physics)

Research groups

  • Elementary Particle Theory


Chapter in book

  • Lenz, Alexander (2015). Lifetimes and Heavy Quark Expansion. In QCD and Heavy Quarks: In Memoriam Nikolai Uraltsev. Bigi, Ikaros, Gambino, Paolo & Mannel, Thomas New Jersey: World Scientific. 63-109.

Conference Paper

  • Braun, Vladimir,, Fries, Rainer,, Mahnke, Nils, Lenz, Alexander & Stein, Eckart (2002), Soft contribution to the nucleon electromagnetic form-factors, Baryons 2002. Virginia, Virginia.
  • Lenz, Alexander (2011), CKM theory status, in Soffer, A. eds, Proceedings of the 9th International Conference on Flavor Physics and CP Violation, FPCP 2011 9th International Conference on Flavor Physics and CP Violation, FPCP 2011. Tel Aviv, Israel, Tel Aviv.
  • Bobrowski, Markus & Lenz, Alexander (2010), Charm mixing in the Standard Model, ICHEP2010: SISSA.
  • Lenz, Alexander (2014), Bs-antiBs mixing and lifetimes, PoS Beauty2014 (2014) 002 BEAUTY 2014: The 15th International Conference on B-Physics at Frontier Machines at the University of Edinburgh. Edinburgh, Edinburgh.
  • Lenz, Alexander (2004), Decay rate difference in the neutral B-system: Delta gamma (B(s) and delta gamma(B(d), Flavor Physics & CP Violation 2004 (FPCP 2004). Daegu, Korea.
  • Lenz, Alexander & Bobrowski, Markus (2011), Standard Model Predictions for D0-oscillations and CP-violation, 02: World Scientific, 117-121.
  • Braun, V.M., Ivanov, D. Yu., Lenz, A. & Peters, A. (2009), Threshold pion electroproduction at large momentum transfers, CD09: 057.
  • Lenz, Alexander J. (2008), Mixing and lifetimes of $b-$hadrons, 1026: American Institute of Physics, 36-47.
  • Lenz, Alexander (1998), Next-to-leading order QCD corrections to the lifetime difference of B(s) mesons, Proceedings of Science 042: Corfu Summer Institute on Elementary Particle Physics 1998. Corfu, Corfu.
  • Lenz, Alexander, Pas, Heinrich & Schalla, Dario (2010), Constraints on fourth generation Majorana neutrinos, 259: IOP Publishing.
  • Lenz, Alexander & Nierste, Ulrich (2011), Numerical Updates of Lifetimes and Mixing Parameters of B Mesons, in Gershon, Tim eds, CKM unitarity triangle 6th International Workshop, CKM 2010, Warwick, UK, 6-10 September 2010. Warwick, UK, INSPIRE, Warwick.
  • Lenz, Alexander (2014), B-mixing in and beyond the standard model, CKM 2014. Vienna, Vienna.
  • Lenz, Alexander (2008), Theoretical status of Bs-mixing and lifetimes of heavy hadrons, in Castaldi, R., Chiarelli, G., Forti, F & Scribano, A. eds, 177-178: Hadron Collider Physics Symposium 2007. La Biodola, Isola d’Elba, Italy, Elsevier, 81-86.
  • Lenz, Alexander (2007), Lifetimes and oscillations of heavy mesons, in Recksiegel, S., Hoang, A. & Paul, S. eds, eConf C0610161: International Conference on Heavy Quarks and Leptons, 8th International Workshop. Munich, Deutsches Museum, Munich, 421-436.
  • Lenz, Alexander (2016), Theory Overview, in Lenz, Alexander & Carbone, Angelo eds, VIII International Workshop On Charm Physics (CHARM 2016). Bologna, Italy, International School for Advanced Studies (SISSA), PoS(CHARM2016)003.
  • Lenz, Alexander (2012), Theoretical update of $B$-Mixing and Lifetimes, Moriond Electroweak 2012 and CERN. Nikhef, Trento, Nikhef, Trento.
  • Braun, V.M., Ivanov, D. Yu., Lenz, A. & Peters, A. (2009), Threshold Pion Production at Large Momentum Transfers, in Tserruya, I., Gal, A. & Ashery, D. eds, Proceedings of the Eighteenth Particles and Nuclei International Conference: PANIC08, Eilat, Israel, 9-14 November, 2008. Eilat, Israel, Elsevier, Eilat, 294-296.
  • Lenz, Alexander (2001), Theoretical status of the lifetime predictions: (Delta Gamma / Gamma)(B(s), tau(B+) / tau(B(d) and tau(Lambda(b) / tau(B(d), in Wu, Yue-Liang eds, Proceedings of the ICFP2001 nternational Conference on Flavor Physics (ICFP) 2001. Hunan, World Scientific, Singapore, 291-296.
  • Bobrowski, Markus, Lenz, Alexander & Rauh, Thomas (2012), Short distance D-Dbar mixing, 5th International Workshop on Charm Physics, Honolulu, Hawai’i, May 14–17, 2012. Honolulu, Hawai’i, Honolulu HI.
  • Lenz, Alexander (2008), The Theoretical status of $\bar{B}$ - $B^-$ mixing and lifetimes of heavy hadrons, 23: World Scientific, 3321-3328.
  • Barbiero, et al & Lenz, Alexander (2002), CKM elements from tree-level B decays and lifetimes.
  • Lenz, Alexander J. (2008), Search for new physics in $B_s$ -mixing, in Peloso, M. eds, Proceeding of the conference Continuous Advances in QCD 2008 8th Workshop on Continuous Advances in QCD (Quantum Chromodynamics). University of Minnesota, USA, World Scientific, University of Minnesota, 70-78.

Conference Proceeding

  • Lenz, Alexander & Willocq, Stephane (2001). Mixing and lifetimes summary.
  • Braun, Vladimir, Lenz, Alexander, Stein, Eckart, Schafer, Andreas & Beneke, Martin (2001). Exclusive B decays. Exclusive B decays, Regensburg.

Journal Article

  • Lenz, Alexander (2013). Constraints on a fourth generation of fermions from Higgs Boson searches. Advances in High Energy Physics 2013: 910275.
  • Ball, Patricia, Braun, Vladimir & Lenz, Alexander (2006). Higher-twist distribution amplitudes of the K meson in QCD. Journal of High Energy Physics 2006(05): 004.
  • Beneke, Martin, Buchalla, Gerhard, Greub, Christoph, Lenz, Alexander & Nierste, Ulrich (1999). Next-to-leading order QCD corrections to the lifetime difference of B(s) mesons. Physics Letters B 459(4): 631.
  • Lenz, Alexander (2019). Charming clue for our existence. Nature Reviews Physics 1(6): 365-366.
  • King, Daniel, Lenz, Alexander & Rauh, Thomas (2019). Bs mixing observables and |Vtd/Vts| from sum rules. Journal of High Energy Physics 2019(5): 34.
  • 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): 113006
  • 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): 016007.
  • Kubo, J. & Lenz, A. (2010). Large loop effects of extra SUSY Higgs doublets to CP violation in B^0 mixing. Physical Review D 82(7).
  • Battaglie, et al & Lenz, Alexander (2004). The CKM matrix and the unitarity triangle. arXiv
  • Lenz, A.J. (2011). Simple relation for Bs mixing. Physical Review D 84(3): 031501(R).
  • Eberhardt, Otto, Lenz, Alexander, Menzel, Andreas, Nierste, Ulrich & Wiebusch, Martin (2012). Status of the fourth fermion generation before ICHEP2012: Higgs data and electroweak precision observables. Physical Review D 86(7): 074014.
  • Lenz, Alexander (2007). Unparticle Effects in Bs mixing. Physical Review D 76(6): 065006.
  • Djouadi, Abdelhak & Lenz, Alexander (2012). Sealing the fate of a fourth generation of fermions. Physics Letters B 715(4-5): 310-314.
  • Lenz, Alexander & Nierste, Ulrich (2007). Theoretical update of Bs mixing. Journal of High Energy Physics 2007(06): 072.
  • Lenz, Alexander & Tetlalmatzi-Xolocotzi, Gilberto (2020). Model-independent bounds on new physics effects in non-leptonic tree-level decays of B-mesons. Journal of High Energy Physics 2020(7): 177.
  • Braun, V.M., Ivanov, D. Yu., Lenz, A. & Peters, A. (2009). Exclusive production of soft pions in DIS. Modern Physics Letters A 24(35n37): 2931-2939.
  • Lenz, Alexander, Wittmann, Markus & Stein, Eckart (2004). Improved light-cone sum rules for the electromagnetic form factors of the nucleon. Physics Letters B 581(3-4): 199-206.
  • Lenz, Alexander, Ostermaier, Gaby & Nierste, Ulrich (1999). Determination of the CKM angle gamma and |V(ub) / V(cb)| from inclusive direct CP asymmetries and branching ratios in charmless B decays. Physical Review D 59(3).
  • Beneke, Martin, Buchalla, Gerhard, Greub, Christoph, Lenz, Alexander & Nierste, Ulrich (2002). The B+−Bd0 lifetime difference beyond leading logarithms. Nuclear Physics B 639(1-2): 389-407.
  • Lenz, Alexander (2015). Lifetimes and heavy quark expansion. International Journal of Modern Physics A 30(10): 1543005.
  • Lenz, Alexander, Hodges, David, Hulme, Daniel, Kvedaraite, Sandra, Richings, Jack, Shen Woo, Jian & Waite, Philip (2014). Investigating bounds on decoherence in quantum mechanics via B and D-mixing. Nuclear Physics B 888: 129-136.
  • Eberhardt, Otto, Herbert, Geoffrey, Lacker, Heiko, Lenz, Alexander, Menzel, Andreas, Nierste, Ulrich & Wiebusch, Martin (2012). Joint analysis of Higgs boson decays and electroweak precision observables in the standard model with a sequential fourth generation. Physical Review D 86(1): 013011.
  • The LHCb Collaboration,, Bharucha, A., Bigi, I.I., Bobeth, C., Bobrowski, M., Brod, J., Buras, A.J., Davies, C.T.H., Datta, A., Delaunay, C., Descotes-Genon, S., Ellis, J., Feldmann, T., Fleischer, R., Gedalia, O., Girrbach, J., Guadagnoli, D., Hiller, G., Hochberg, Y., Hurth, T., Isidori, G., Jäger, S., Jung, M., Kagan, A., Kamenik, J.F., Lenz, A., Ligeti, Z., London, D., Mahmoudi, F., Matias, J., Nandi, S., Nir, Y., Paradisi, P., Perez, G., Petrov, A.A., Rattazzi, R., Sharpe, S.R., Silvestrini, L., Soni, A., Straub, D.M., van Dyk, D., Virto, J., Wang, Y.-M., Weiler, A. & Zupan, J. (2013). Implications of LHCb measurements and future prospects. The European Physical Journal C 73: 2373.
  • 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): 093007.
  • Lenz, Alexander, Spannowsky, Michael & Tetlalmatzi-Xolocotzi, Gilberto (2018). Double-charming Higgs boson identification using machine-learning assisted jet shapes. Physical Review D 97(1): 016001.
  • Brod, Joachim, Lenz, Alexander, Tetlalmatzi-Xolocotzi, Gilberto & Wiebusch, Martin (2015). New physics effects in tree-level decays and the precision in the determination of the quark mixing angle γ. Physical Review D 92(3): 033002.
  • Bobeth, Christoph, Haisch, Ulrich, Lenz, Alexander, Pecjak, Ben & Tetlalmatzi-Xolocotzi, Gilberto (2014). On new physics in Delta Gammad. Journal of High Energy Physics 2014(6): 40.
  • Bona, M et al. & Lenz, A. (2007). SuperB: A High-Luminosity Asymmetric e+ e- Super Flavor Factory. Conceptual Design Report.
  • Kifune, N., Kubo, J. & Lenz, A. (2008). Flavor changing neutral Higgs bosons in a supersymmetric extension based on a Q6 family symmetry. Physical Review D 77(7): 076010.
  • Braun, Vladimir, Lenz, Alexander, Mahnke, Nils & Stein, Eckart (2002). Light cone sum rules for the nucleon form-factors. Physical Review D 65(7).
  • Beneke, Martin & Lenz, Alexander (2001). Lifetime difference of B(s) mesons: Theory status. Journal of Physics G: Nuclear and Particle Physics 27(6): 1219.
  • Bobrowski, M., Lenz, A., Riedl, J. & Rohrwild, J. (2010). How large can the SM contribution to CP violation in D0 − D0 mixing be? Journal of high energy physics 2010(03): 009.
  • Braun,Vladimir & Lenz, Alexander (2004). On the SU(3) symmetry-breaking corrections to meson distribution amplitudes. Physical Review D 70(7).
  • Jubb, Thomas, Kirk, Matthew & Lenz, Alexander (2017). Charming dark matter. Journal of High Energy Physics 2017(12): 10.
  • O'Leary, B. & others (2010). SuperB Progress Reports - Physics. arXiv
  • Eberhardt, O., Lenz, A. & Rohrwild, J. (2010). Less space for a new family of fermions. Physical Review D 82(9): 095006.
  • Bobrowski, M., Lenz, A., Riedl, J. & Rohrwild, J. (2009). D−D¯ mixing in the framework of the HQE revisited. arXiv
  • Buchalla, G., Komatsubara, T.K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D.M., Ball, P., Baracchini, E., Bell, G., Beneke, M., Berryhill, J., Bevan, A., Bigi, I.I., Blanke, M., Bobeth, Ch., Bona, M., Borzumati, F., Browder, T., Buanes, T., Buchmüller, O., Buras, A.J., Burdin, S., Cassel, D.G., Cavanaugh, R., Ciuchini, M., Colangelo, P., Crosetti, G., Dedes, A., De Fazio, F., Descotes-Genon, S., Dickens, J., Doležal, Z., Dürr, S., Egede, U., Eggel, C., Eigen, G., Fajfer, S., Feldmann, Th., Ferrandes,, R., Gambino, P., Gershon, T., Gibson, V., Giorgi, M., Gligorov, V.V., Golob, B., Golutvin, A., Grossman,, Y., Guadagnoli, D., Haisch, U., Hazumi, M., Heinemeyer, S., Hiller, G., Hitlin, D., Huber, T., Hurth, T., Iijima, T., Ishikawa, A., Isidori, G., Jäger, S., Khodjamirian, A., Koppenburg, P., Lagouri, T., Langenegger, U., Lazzeroni, C., Lenz, A., Lubicz, V., Lucha, W., Mahlke, H., Melikhov, D., Mescia, F., Misiak, M., Nakao, M., Napolitano, J., Nikitin, N., Nierste, U., Oide, K., Okada, Y., Paradisi, P., Parodi, F., Patel, M., Petrov, A.A., Pham, T.N., Pierini, M., Playfer, S., Polesello, G., Policicchio, A., Poschenrieder,, A., Raimondi, P., Recksiegel, S., Řezníček, P., Robert, A., Rosner, J.L., Ruggiero, G., Sarti, A., Schneider, O., Schwab, F., Simula, S., Sivoklokov, S., Slavich, P., Smith, C., Smizanska, M., Soni, A., Speer, T., Spradlin, P., Spranger, M., Starodumov, A., Stech, B., Stocchi, A., Stone, S., Tarantino, C., Teubert, F., T’Jampens, S., Toms, K., Trabelsi, K., Trine, S., Uhlig, S., Vagnoni, V., van Hunen, J.J., Weiglein, G., Weiler, A., Wilkinson, G., Xie, Y., Yamauchi, M., Zhu, G., Zupan, J. & Zwicky, R. (2008). $B$, $D$ and $K$ decays. The European Physical Journal C 57(1-2): 309-492.
  • Lenz, Alexander (2014). Selected Topics in Heavy Flavour Physics. Journal of Physics G: Nuclear and Particle Physics 41(10): 103001.
  • Eberhardt, Otto Herbert, Geoffrey, Lacker, Heiko, Lenz, Alexander Menzel, Andreas Nierste, Ulrich & Wiebusch, Martin (2012). Impact of a Higgs boson at a mass of 126 GeV on the standard model with three and four fermion generations. Physical Review Letters 109(24): 241802.
  • Bicer, M., DuranYildiz, H., Yildiz, I., Coignet, G., Delmastro, M., Alexopoulos, T., Grojean, C., Antusch, S., Sen, T., He, H-J., Potamianos, K., Haug, S., Moreno, A., Heister, A., Sanz, V., Gomez-Ceballos, G., Klute, M., Zanetti, M., Wang, L.-T., Dam, M., Boehm, C., Glover, N., Krauss, F., Lenz, A., Syphers, M., Leonidopoulos, C., Ciulli, V., Lenzi, P., Sguazzoni, G., Antonelli, M., Boscolo, M., Dosselli, U., Frasciello, O., Milardi, C., Venanzoni, G., Zobov, M., vanderBij, J., deGruttola, M., Kim, D.-W., Bachtis, M., Butterworth, A., Bernet, C., Botta, C., Carminati, F., David, A., Deniau, L., d’Enterria, D., Ganis, G., Goddard, B., Giudice, G., Janot, P., Jowett, J.M., Lourenço, C., Malgeri, L., Meschi, E., Moortgat, F., Musella, P., Osborne, J.A., Perrozzi, L., Pierini, M., Rinolfi, L., deRoeck, A., Rojo, J., Roy, G., Sciabà, A., Valassi, A., S.Waaijer, C., Wenninger, J., Woehri, H., Zimmermann, F., Blondel, A., Koratzinos, M., Mermod, P., Onel, Y., Talman, R., CastanedaMiranda, E., Bulyak, E., Porsuk, D., Kovalskyi, D., Padhi, S., Faccioli, P., Ellis, J.R., Campanelli, M., Bai, Y., Chamizo, M., Appleby, R.B., Owen, H., MauryCuna, H., Gracios, C., Munoz-Hernandez, G.A., Trentadue, L., Torrente-Lujan, E., Wang, S., Bertsche, D., Gramolin, A., Telnov, V., Kado, M., Petroff, P., Azzi, P., Nicrosini, O., Piccinini, F., Montagna, G., Kapusta, F., Laplace, S., daSilva, W., Gizani, N., Craig, N., Han, T., Luci, C., Mele, B., Silvestrini, L., Ciuchini, M., Cakir, R., Aleksan, R., Couderc, F., Ganjour, S., Lançon, E., Locci, E., Schwemling, P., Spiro, M., Tanguy, C., Zinn-Justin, J., Moretti, S., Kikuchi, M., Koiso, H., Ohmi, K., Oide, K., Pauletta, G., RuizdeAustri, R., Gouzevitch, M. & Chattopadhyay S. (2014). First Look at the Physics Case of TLEP. Journal of High Energy Physics 2014(01): 164.
  • Jäger, Sebastian, Kirk, Matthew, Lenz, Alexander & Leslie, Kirsten (2020). Charming new B-physics. Journal of High Energy Physics 2020(3): 122.
  • Di Luzio, Luca, Kirk, Matthew & Lenz, Alexander (2018). Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ− anomalies. Physical Review D 97(9): 095035.
  • Lenz, A., Nierste, U. Charles, J. Descotes-Genon, S. Lacker, H. Monteil, S., Niess, V. & Jampens, S.T. (2012). Constraints on new physics in $B-\bar{B}$ mixing in the light of recent LHCb data. Physical Review D 86(3): 033008.
  • Lenz, A., Pas, H. & Schalla, D. (2011). Fourth generation Majorana neutrinos. Physical Review D 85(7): 075025.
  • Braun, Vladimir, Ivanov, Dmitri, Lenz, Alexander & Peters, Andreas (2007). Deep inelastic pion electroproduction at threshold. Physical Review D 75(1).
  • Artuso, Marina, Borissov, Guennadi & Lenz, Alexander (2015). CP violation in the B0s system. Reviews of Modern Physics 88(4): 045002.
  • Krinner, Fabian, Lenz, Alexander & Rauh, Thomas (2013). The inclusive decay b to ccs revisited. Nuclear Physics B 876(1): 31–54.
  • Jubb, Thomas, Kirk, Matthew & Lenz, Alexander (2017). On the ultimate precision of meson mixing observables. Nuclear Physics B 915: 431-453.
  • Lenz, Alexander & Rauh, Thomas (2013). D-meson lifetimes within the heavy quark expansion. Physical Review D: particles, fields, gravitation and cosmology 88(3): 034004.
  • Kawashima, Kenji Kubo, Jisuke & Lenz, Alexander (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.
  • Lenz, Alexander, Ostermaier, Gaby & Nierste, Ulrich (1997). Penguin diagrams, charmless B decays and the missing charm puzzle. Physical Review D 56(11): 7228.
  • Kirk, M., Lenz, A. & Rauh, T. (2017). Dimension-six matrix elements for meson mixing and lifetimes from sum rules. Journal of High Energy Physics 2017(12): 68.
  • Braun, Vladimir, Lenz, Alexander, Peters, Gerhard & Radyushkin, A (2006). Light cone sum rules for gamma* N ---> Delta transition form-factors. Physical Review D 73(3).
  • Ball, Patricia, Braun, Vladimir & Lenz, Alexander (2007). Twist-4 distribution amplitudes of the K* and phi mesons in QCD. Journal of High Energy Physics 2007(08): 090.

Supervision students