Logo der Universit├Ąt Hamburg

B4 – Unstable Quantum Fields and Higgs Vacuum



Project Leaders

Bernd Kniehl (e-mail | group homepage)


Abstract

In general, mixing and instability of elementary particles concur in nature. The central goal is to construct a general renormalization scheme that rigorously incorporates both aspects for fermionic and bosonic degrees of freedom, so that the renormalized parameters are gauge independent and the mixing matrices retain their tree-level properties, e.g. unitarity, texture zeros, etc. The phenomenological implications of this new concept for present and future precision tests of the standard model, its minimal supersymmetric extension, and alternative new-physics scenarios are to be analyzed quantitatively.


Researchers

Anne Ernst

Mikhail Kalmykov

Gustav Kramer

Andrey Pikelner

Andreas Ringwald

Oleg Tarasov

Oleg Veretin


Former members

Andrea Almasy

Malgorzata Awramik

Isabella Bierenbaum

Elena Scherbakova


Publications


Get these publications as bibtex-file


"On the b-quark running mass in QCD and the SM"
Bednyakov, A. V. and Kniehl, B. A. and Pikelner, A. F. and Veretin, O. L.
Nucl. Phys. B916, 463-483 (2017)
doi: 10.1016/j.nuclphysb.2017.01.004
eprint: 1612.00660 [hep-ph]

"mr: a C++ library for the matching and running of the Standard Model parameters"
Kniehl, Bernd A. and Pikelner, Andrey F. and Veretin, Oleg L.
Comput. Phys. Commun. 206, 84-96 (2016)
doi: 10.1016/j.cpc.2016.04.017
eprint: 1601.08143 [hep-ph]

"Stability of the Electroweak Vacuum: Gauge Independence and Advanced Precision"
Bednyakov, A. V. and Kniehl, B. A. and Pikelner, A. F. and Veretin, O. L.
Phys. Rev. Lett. 115, 201802 (2015)
doi: 10.1103/PhysRevLett.115.201802
eprint: 1507.08833 [hep-ph]

"Two-loop electroweak threshold corrections in the Standard Model"
Kniehl, Bernd A. and Pikelner, Andrey F. and Veretin, Oleg L.
Nucl.Phys. B896, 19-51 (2015)
doi: 10.1016/j.nuclphysb.2015.04.010
eprint: 1503.02138 [hep-ph]

"Self-consistence of the Standard Model via the renormalization group analysis"
Jegerlehner, Fred and Kalmykov, Mikhail \relax Yu. and Kniehl, Bernd A.
Proceedings, 16th International workshop on Advanced Computing and Analysis Techniques in physics ACAT 14: Prague, Czech Republic, September 1-5, 2014, J. Phys. Conf. Ser. (2015)
doi: 10.1088/1742-6596/608/1/012074
eprint: 1412.4215 [hep-ph]

"Considerations concerning the generalization of the Dirac equations to unstable fermions"
Kniehl, Bernd A. and Sirlin, Alberto
Phys.Rev. D90, 077901 (2014)
doi: 10.1103/PhysRevD.90.077901
eprint: 1409.5869 [hep-ph]

"Propagator mixing renormalization for Majorana fermions"
Kniehl, Bernd A.
Phys.Rev. D89, 116010 (2014)
doi: 10.1103/PhysRevD.89.116010
eprint: 1404.5908 [hep-th]

"Two-loop electroweak threshold corrections to the bottom and top Yukawa couplings"
Kniehl, Bernd A. and Veretin, Oleg L.
Nucl.Phys. B885, 459-480 (2014)
doi: 10.1016/j.nuclphysb.2015.02.012, 10.1016/j.nuclphysb.2014.05.029
eprint: 1401.1844 [hep-ph]

"All-Order Renormalization of the Propagator Matrix for Fermionic Systems with Flavor Mixing"
Kniehl, Bernd A.
Phys.Rev.Lett. 112, 071603 (2014)
doi: 10.1103/PhysRevLett.112.071603
eprint: 1308.3140 [hep-ph]

"All-order renormalization of propagator matrix for unstable Dirac fermions"
Kniehl, Bernd A.
Phys.Rev. D89, 096005 (2014)
doi: 10.1103/PhysRevD.89.096005

"About the EW contribution to the relation between pole and MS-masses of the top-quark in the Standard Model"
Jegerlehner, Fred and Kalmykov, Mikhail Yu. and Kniehl, Bernd A.
PoS DIS2013, 190 (2013)
eprint: 1307.4226

"On the difference between the pole and the \overline\mathrmMS masses of the top quark at the electroweak scale"
Jegerlehner, Fred and Kalmykov, Mikhail Yu. and Kniehl, Bernd A.
Phys.Lett. B722, 123-129 (2013)
doi: 10.1016/j.physletb.2013.04.012
eprint: 1212.4319 [hep-ph]

"Higgs Boson Mass and New Physics"
Bezrukov, Fedor and Kalmykov, Mikhail Yu. and Kniehl, Bernd A. and Shaposhnikov, Mikhail
JHEP 1210, 140 (2012)
doi: 10.1007/JHEP10(2012)140
eprint: 1205.2893 [hep-ph]

"Renormalization in general theories with inter-generation mixing"
Kniehl, Bernd A. and Sirlin, Alberto
Phys.Rev. D85, 036007 (2012)
doi: 10.1103/PhysRevD.85.036007
eprint: 1201.4333 [hep-ph]

"Quark mixing renormalization effects in the determination of |V_tq|"
Almasy, Andrea A. and Kniehl, Bernd A. and Sirlin, Alberto
Phys.Rev. D83, 096004 (2011)
doi: 10.1103/PhysRevD.83.096004
eprint: 1101.5758 [hep-ph]

"Novel formulations of CKM matrix renormalization"
Kniehl, Bernd A. and Sirlin, Alberto
AIP Conf.Proc. 1182, 327-330 (2009)
doi: 10.1063/1.3293809
eprint: 0906.2670 [hep-ph]

"On-shell renormalization of the mixing matrices in Majorana neutrino theories"
Almasy, Andrea A. and Kniehl, Bernd A. and Sirlin, Alberto
Nucl. Phys. B818, 115-134 (2009)
doi: 10.1016/j.nuclphysb.2009.03.025
eprint: 0902.3793 [hep-ph]

"A Novel Formulation of Cabibbo-Kobayashi-Maskawa Matrix Renormalization"
Kniehl, Bernd A. and Sirlin, Alberto
Phys. Lett. B673, 208-210 (2009)
doi: 10.1016/j.physletb.2009.02.024
eprint: 0901.0114 [hep-ph]

"Quark-mixing renormalization effects on the W-boson partial decay widths"
Almasy, A. A. and Kniehl, B. A. and Sirlin, A.
Phys. Rev. D79, 076007 (2009)
doi: 10.1103/PhysRevD.79.076007
eprint: 0811.0355 [hep-ph]

"Pole Mass, Width, and Propagators of Unstable Fermions"
Kniehl, Bernd A. and Sirlin, Alberto
Phys. Rev. D77, 116012 (2008)
doi: 10.1103/PhysRevD.77.116012
eprint: 0801.0669 [hep-th]

"Simple on-shell renormalization framework for the Cabibbo- Kobayashi-Maskawa matrix"
Kniehl, Bernd A. and Sirlin, Alberto
Phys. Rev. D74, 116003 (2006)
doi: 10.1103/PhysRevD.74.116003
eprint: hep-th/0612033

"Simple Approach to Renormalize the Cabibbo-Kobayashi- Maskawa Matrix"
Kniehl, Bernd A. and Sirlin, Alberto
Phys. Rev. Lett. 97, 221801 (2006)
doi: 10.1103/PhysRevLett.97.221801
eprint: hep-ph/0608306

Impressum  | last modified 30 Jan 2017