We present SUSY_FLAVOR version 2 — a Fortran 77 program that calculates low-energy flavor observables in the general R-parity conserving MSSM. For a set of MSSM parameters as input, the code gives ...predictions for: 1.Electric dipole moments of the leptons and the neutron.2.Anomalous magnetic moments (i.e. g−2) of the leptons.3.Radiative lepton decays (μ→eγ and τ→μγ,eγ).4.Rare Kaon decays (KL0→π0ν̄ν and K+→π+ν̄ν).5.Leptonic B decays (Bs,d→l+l−, B→τν and B→Dτν).6.Radiative B decays (B→X̄sγ).7.ΔF=2 processes (K̄0–K0, D̄–D, B̄d–Bd and B̄s–Bs mixing). Comparing to SUSY_FLAVOR v1, where the matching conditions were calculated strictly at one-loop level, SUSY_FLAVOR v2 performs the resummation of all chirally enhanced corrections, i.e. takes into account the enhanced effects from tanβ and/or large trilinear soft mixing terms to all orders in perturbation theory. Also, in SUSY_FLAVOR v2 new routines calculation of B→(D)τν, g−2, radiative lepton decays and Br(l→l′γ) were added. All calculations are done using exact diagonalization of the sfermion mass matrices. The program can be obtained from http://www.fuw.edu.pl/susy_flavor.
Program title:SUSY_FLAVOR v2
Catalogue identifier: AEGV_v2_0
Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEGV_v2_0.html
Program obtainable from: CPC Program Library, Queen’s University, Belfast, N. Ireland
Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html
No. of lines in distributed program, including test data, etc.: 15683
No. of bytes in distributed program, including test data, etc.: 89130
Distribution format: tar.gz
Programming language: Fortran 77.
Computer: Any.
Operating system: Any, tested on Linux.
Classification: 11.6.
Does the new version supersede the previous version?: Yes
Catalogue identifier of previous version: AEGV_v1_0
Journal reference of previous version: Comput. Phys. Comm. 181 (2010) 2180
Nature of problem:
Predicting CP-violating observables, meson mixing parameters and branching ratios for set of rare processes in the general R-parity conserving MSSM.
Solution method:
We use standard quantum theoretical methods to calculate Wilson coefficients in MSSM and at one loop including QCD corrections at higher orders when this is necessary and possible. The input parameters can be read from an external file in SLHA format.
Reasons for new version:
A major rewrite of the internal code structure to accommodate higher order corrections; new observables added.
Summary of revisions:1.SUSY_FLAVOR v2.0 is able to perform resummation of chirally enhanced corrections to all orders of perturbation expansion (v1.0 included 1-loop terms only).2.Routines calculating new observables are added: g-2 lepton magnetic moment anomaly, μ to eγ and τ to eγ,μγ decays, B to Dτν decays, B to μe,τe,τμ decays.3.Parameter initialization in the sfermion sector is simplified and follows, by default, the SLHA2 conventions.Restrictions: The results apply only to the case of MSSM with R-parity conservation.
Running time: For a single parameter set approximately 1 s in double precision on a PowerBook Mac G4.
Flavor physics of leptons and dipole moments Raidal, M.; van der Schaaf, A.; Bigi, I. ...
European physical journal. C, Particles and fields (Print),
09/2008, Letnik:
57, Številka:
1-2
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
This chapter of the report of the “Flavor in the era of the LHC” Workshop discusses the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sector ...and in flavor conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavor structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the standard model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.
We present SUSY_FLAVOR – a Fortran 77 program that calculates important leptonic and semi-leptonic low-energy observables in the general
R-parity conserving MSSM. For a set of input MSSM parameters, ...the code gives predictions for the
K
¯
0
K
0
,
D
¯
D
,
B
¯
d
B
d
and
B
¯
s
B
s
mixing parameters;
B
→
X
s
γ
,
B
s
,
d
→
l
+
l
−
,
K
L
0
→
π
0
ν
¯
ν
and
K
+
→
π
+
ν
¯
ν
decay branching ratios; and the electric dipole moments of the leptons and the neutron. All these quantities are calculated at one-loop level (with some higher-order QCD corrections included) in the exact sfermion mass eigenbasis, without resorting to mass insertion approximations. The program can be obtained from
http://www.fuw.edu.pl/susy_flavor.
Program title: SUSY_FLAVOR
Catalogue identifier: AEGV_v1_0
Program summary URL:
http://cpc.cs.qub.ac.uk/summaries/AEGV_v1_0.html
Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland
Licensing provisions: Standard CPC licence,
http://cpc.cs.qub.ac.uk/licence/licence.html
No. of lines in distributed program, including test data, etc.: 14 603
No. of bytes in distributed program, including test data, etc.: 82 126
Distribution format: tar.gz
Programming language: Fortran 77
Computer: PCs and workstations
Operating system: Any, tested on Linux
Classification: 11.6
Nature of problem: Predicting CP-violating observables, meson mixing parameters and branching ratios for a set of rare processes in the general
R-parity conserving MSSM.
Solution method: We use standard quantum theoretical methods to calculate Wilson coefficients in MSSM and at one loop including QCD corrections at higher orders when this is necessary and possible. The input parameters can be read from an external file in SLHA format.
Restrictions: The results apply only to the case of MSSM with
R-parity conservation.
Running time: For single parameter set approximately 1 s in double precision on a PowerBook Mac G4.
Z′ and the Appelquist–Carrazzone decoupling Chankowski, P.H.; Pokorski, S.; Wagner, J.
The European physical journal. C, Particles and fields,
7/2006, Letnik:
47, Številka:
1
Journal Article
Recenzirano
Odprti dostop
We consider the electroweak theory with an additional neutral vector boson Z′ at one loop. We propose a renormalization scheme which makes the decoupling of heavy Z′ effects manifest. The proposed ...scheme justifies the usual procedure of performing fits to the electroweak data by combining the full SM loop corrections to observables with the tree-level corrections due to the extended gauge structure. Using this scheme we discuss in the model with extra an U(1)′ group factor one-loop results for the ρ parameters defined in several different ways.
(Non)decoupling of the Higgs triplet effects Chankowski, P.H.; Pokorski, S.; Wagner, J.
The European physical journal. C, Particles and fields,
05/2007, Letnik:
50, Številka:
4
Journal Article
Recenzirano
Odprti dostop
We consider the electroweak theory with an additional Higgs triplet at one loop, using the hybrid renormalization scheme based on αEM, GF and MZ as input observables. We show that in this scheme loop ...corrections can in a natural way be split into a standard model part and corrections due to “new physics”. The latter, however, do not decouple in the limit of an infinite triplet mass parameter, if the triplet trilinear coupling to the SM Higgs doublets grows with the triplet mass. For electroweak observables computed at one loop this effect can be attributed to the radiative generation in this limit of a nonvanishing vacuum expectation value of the triplet. We also point out that whenever tree level expressions for the electroweak observables depend on vacuum expectation values of scalar fields other than the standard model Higgs doublet, a tadpole contribution to the “oblique” parameter T should in principle be included. The origin of nondecoupling is discussed also on the basis of symmetry principles in a simple scalar field theory.
A mechanism of double protection of the Higgs potential, by supersymmetry and by a global symmetry, is investigated in a class of supersymmetric models with the SU(3)cxSU(3)wxU(1)x gauge symmetry. ...The electroweak symmetry can be then broken with no fine-tuning at all.
We identify fixed points in the renormalization group equations for neutrino mixing angles, which can be reached during the evolution for several mass patterns and give sin
22
θ
sol=sin
22
θ
atmsin
2
...θ
3/(sin
2
θ
atmcos
2
θ
3+sin
2
θ
3)
2, consistently with the present experimental information. Further experimental test of this relation is of crucial interest. Several interesting mass patterns show stability in the presence of fixed point solutions for the angles.
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