F. J. Ronga

Predictions for supersymmetric particle masses using indirect experimental and cosmological constraints

In view of the imminent start of the LHC experimental programme, we use the available indirect experimental and cosmological information to estimate the likely range of parameters of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), using a Markov-chain Monte Carlo (MCMC) technique to sample the parameter space. The 95% confidence-level area in the (m0, m1/2) plane of the CMSSM lies largely within the region that could be explored with 1 fb−1 of integrated luminosity at 14 TeV, and much of the 68% confidence-level area lies within the region that could be explored with 50 pb−1 of integrated luminosity at 10 TeV. A same-sign dilepton signal could well be visible in most of the 68% confidence-level area with 1 fb−1 of integrated luminosity at 14 TeV. We discuss the sensitivities of the preferred ranges to variations in the most relevant indirect experimental and cosmological constraints and also to deviations from the universality of the supersymmetry-breaking contributions to the masses of the Higgs bosons.

Supersymmetry and dark matter in light of LHC 2010 and XENON100 data

We make frequentist analyses of the CMSSM, NUHM1, VCMSSM and mSUGRA parameter spaces taking into account all the public results of searches for supersymmetry using data from the 2010 LHC run and the XENON100 direct search for dark matter scattering. The LHC data set includes ATLAS and CMS searches for

Predictions for mt and MW in minimal supersymmetric models

\mathrm{jets} + {\not}E_{T}

Predictions for m(t) and M(W) in Minimal Supersymmetric Models

events (with or without leptons) and for the heavier MSSM Higgs bosons, and the upper limit on BR(Bs→μ+μ−) including data from LHCb as well as CDF and DØ. The absence of signals in the LHC data favours somewhat heavier mass spectra than in our previous analyses of the CMSSM, NUHM1 and VCMSSM, and somewhat smaller dark matter scattering cross sections, all close to or within the pre-LHC 68% CL ranges, but does not impact significantly the favoured regions of the mSUGRA parameter space. We also discuss the impact of the XENON100 constraint on spin-independent dark matter scattering, stressing the importance of taking into account the uncertainty in the π-nucleon σ term ΣπN, which affects the spin-independent scattering matrix element, and we make predictions for spin-dependent dark matter scattering. Finally, we discuss briefly the potential impact of the updated predictions for sparticle masses in the CMSSM, NUHM1, VCMSSM and mSUGRA on future e+e− colliders.

Measurement of the branching fractions for B- → D (*)+π-ℓ-v̄ℓ and B̄0 → D(*)0π+ℓ -v̄ℓ

Using a frequentist analysis of experimental constraints within two versions of the minimal supersymmetric extension of the standard model, we derive the predictions for the top quark mass, m{sub t}, and the W boson mass, M{sub W}. We find that the supersymmetric predictions for both m{sub t} and M{sub W}, obtained by incorporating all the relevant experimental information and state-of-the-art theoretical predictions, are highly compatible with the experimental values with small remaining uncertainties, yielding an improvement compared to the case of the standard model.

Measurement of Wγ and Zγ production in pp collisions at root s=7 TeV

Using a frequentist analysis of experimental constraints within two versions of the minimal supersymmetric extension of the standard model, we derive the predictions for the top quark mass, m{sub t}, and the W boson mass, M{sub W}. We find that the supersymmetric predictions for both m{sub t} and M{sub W}, obtained by incorporating all the relevant experimental information and state-of-the-art theoretical predictions, are highly compatible with the experimental values with small remaining uncertainties, yielding an improvement compared to the case of the standard model.

Predictions formtandMWin minimal supersymmetric models

We report on a measurement of the branching fractions for B- → D(*)+π- l -vl and B0 → D (*)0π+l-vl with 275 × 106 BB events collected at the γ(4S) resonance with the Belle detector at KEKB. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain B(B- → D+π- l-vl = (0.54±0.07(stat)±0.07(syst)±0.06(BR))× 10 -2, B(B- → D(*)+π- l-vl = (0.67 ±0.11(stat) ±0.09(syst) ±0.03(BR)) × 10-2, B(B0 → D0π+ l -vl) = (0.33 ±0.06(stat) ± 0.06(syst) ±0.03(BR)) × 10-2, B(B0 → D(*)0π+l -vl) = (0.65 ±0.12(stat) ± 0.08(syst) ±0.05(BR)) × 10-2, where the third error comes from the error on B → D(*)l -vl decays. Contributions from B0 → D(*)+l-vl decays are excluded in the measurement of B0 → D0π +l-vl.

Measurement of CP violation in B{sup 0}{yields}D*{sup -}{pi}{sup +} and B{sup 0}{yields}D{sup -}{pi}{sup +} decays

Article history: Received 14 May 2011 Received in revised form 6 June 2011 Accepted 12 June 2011 Available online 16 June 2011 Editor: M. Doser

Improved Evidence for Direct CP Violation in B{sup 0}{yields}{pi}{sup +}{pi}{sup -} Decays and Model-Independent Constraints on {phi}{sub 2}

Using a frequentist analysis of experimental constraints within two versions of the minimal supersymmetric extension of the standard model, we derive the predictions for the top quark mass, m{sub t}, and the W boson mass, M{sub W}. We find that the supersymmetric predictions for both m{sub t} and M{sub W}, obtained by incorporating all the relevant experimental information and state-of-the-art theoretical predictions, are highly compatible with the experimental values with small remaining uncertainties, yielding an improvement compared to the case of the standard model.

Weak neutral-current effects in e/sup +/e/sup -/. -->. mu. /sup +/. mu. /sup -/ at 29 GeV

We report measurements of time-dependent decay rates for B{sup 0}{yields}D{sup (*)-}{pi}{sup +} decays and extraction of CP violation parameters that depend on {phi}{sub 3}. Using fully reconstructed D{sup (*)}{pi} events and partially reconstructed D*{pi} events from a data sample that contains 386x10{sup 6} BB pairs that was collected near the {upsilon}(4S) resonance, with the Belle detector at the KEKB asymmetric energy e{sup +}e{sup -} collider, we obtain the CP violation parameters S{sup +}(D{sup (*)}{pi}) and S{sup -}(D{sup (*)}{pi}). We obtain S{sup +}(D*{pi})=0.049{+-}0.020(stat){+-}0.011(sys), S{sup -}(D*{pi})=0.031{+-}0.019(stat){+-}0.011(sys), and S{sup +}(D{pi})=0.031{+-}0.030(stat){+-}0.012(sys), S{sup -}(D{pi})=0.068{+-}0.029(stat){+-}0.012(sys). These results are an indication of CP violation in B{sup 0}{yields}D*{sup -}{pi}{sup +} and B{sup 0}{yields}D{sup -}{pi}{sup +} decays at the 2.5{sigma} and 2.2{sigma} levels, respectively. If we use the values of R{sub D{sup (*}}{pi}} that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B{yields}D{sub s}{sup (*)}{pi} modes, and lattice QCD calculations, we can restrict the allowed region of |sin(2{phi}{sub 1}+{phi}{sub 3})| to be above 0.44 and 0.52 at 68% confidence level from the D*{pi} and D{pi} modes, respectively.