Pietro Slavich

Learn More
The status of the evaluation of the MSSM Higgs sector is reviewed. The phe-nomenological impact of recently obtained corrections is discussed. In particular it is shown that the upper bound on m h within the MSSM is shifted upwards. Consequently , lower limits on tan β obtained by confronting the upper bound as function of tan β with the lower bound on m h(More)
We compute the O(α b α s) two–loop corrections to the neutral Higgs boson masses in the Minimal Supersymmetric Standard Model, using the effective potential approach. Such corrections can be important in the region of parameter space corresponding to tan β ≫ 1 and sizeable µ. In spite of the formal analogy with the O(α t α s) corrections, there are(More)
We present the implementation of the radiative corrections of the Higgs sector in three public computer codes for the evaluation of the particle spectrum in the Minimal Supersymmetric Standard Model, SoftSusy, SPheno and SuSpect. We incorporate the full one–loop corrections to the Higgs boson masses and the electroweak symmetry breaking conditions, as well(More)
We hypothesised that amending an acidic ferralsol with biochar would improve the productivity of a subtropical dairy pasture via reducing soil acidity related constraints and result in improved nitrogen use efficiency. We examined two contrasting biochars with different carbon, nutrient content and acid neutralising values. Field plots were amended with one(More)
We compute the O(α t α s) two–loop corrections to the neutral Higgs boson masses in the Minimal Supersymmetric extension of the Standard Model. An appropriate use of the effective potential allows us to obtain simple analytical formulae, valid for arbitrary values of m A and of the mass parameters in the stop sector. We elucidate some subtleties of the(More)
We study the O(α t α s +α 2 t) two–loop corrections to the minimization conditions of the MSSM effective potential, providing compact analytical formulae for the Higgs tadpoles. We connect these results with the renormalization group running of the MSSM parameters from the grand unification scale down to the weak scale, and discuss the corrections to the(More)
On the two–loop Yukawa corrections to the MSSM Higgs boson masses at large tan β Abstract We complete the effective potential calculation of the two–loop, top/bottom Yukawa corrections to the Higgs boson masses in the Minimal Supersymmetric Standard Model, by computing the O(α 2 t + α t α b + α 2 b) contributions for arbitrary values of the bottom Yukawa(More)
We present the Flavour Les Houches Accord (FLHA) which specifies a set of conventions for flavour-related parameters and observables. The FLHA uses the generic SUSY Les Houches Accord (SLHA) file structure. It defines the relevant Standard Model masses, Wilson coefficients, decay constants, bag parameters, flavour observ-ables, etc. The accord provides a(More)
We address the µ problem of gauge mediation by considering a singlet chiral superfield coupled to the Higgs and messenger fields. We compute the soft terms generated below the messenger scale and study the phenomenological consequences of the model. The experimental bound on the Higgs mass provides a severe constraint that identifies three special regions(More)
We compute the gluino lifetime and branching ratios in Split Supersymmetry. Using an effective–theory approach, we resum the large logarithmic corrections controlled by the strong gauge coupling and the top Yukawa coupling. We find that the resummation of the radiative corrections has a sizeable numerical impact on the gluino decay width and branching(More)