A Theoretical Prediction of the Bs-Meson Lifetime Difference

We present the results of a quenched lattice calculation of the operator matrix elements relevant for predicting the Bs width difference. Our main result is (\Delta\Gamma_Bs/\Gamma_Bs)= (4.7 +/- 1.5 +/- 1.6) 10^(-2), obtained from the ratio of matrix elements, R(m_b)=/<\bar B_s^0|Q_L|B_s^0>=-0.93(3)^(+0.00)_(-0.01). R(m_b) was evaluated from the two relevant B-parameters, B_S^{MSbar}(m_b)=0.86(2)^(+0.02)_(-0.03) and B_Bs^{MSbar}(m_b) = 0.91(3)^(+0.00)_(-0.06), which we computed in our simulation.Comment: 21 pages, 7 PostScript figure

Combined Relativistic and static analysis for all Delta B=2 operators

We analyse matrix elements of Delta B=2 operators by combining QCD results with the ones obtained in the static limit of HQET. The matching of all the QCD operators to HQET is made at NLO order. To do that we have to include the anomalous dimension matrix up to two loops, both in QCD and HQET, and the one loop matching for all the Delta B=2 operators. The matrix elements of these operators are relevant for the prediction of the B-\bar B mixing, B_s meson width difference and supersymmetric effects in Delta B=2 transitions.Comment: 3 pages, 1 figure. Lattice2001(heavyquark

Réadaptation et psychose : de l’enveloppe soignante à l’enveloppe sociale

International audienceAfter a theoretical reminder of main notions of readjustment, rehabilitation, reintegration, the authors broaden the thought on readjustment from clinical experience near chronic psychotic patients in therapeutic flats.They show how the patient converts his ties with his circle and social world, through a new psychic organization with moments of crisis: the patient must gradually free oneself from “nursing envelope” to invest others envelopes, before being able to integrate a new group which constitute “social envelope”.Après un rappel théorique des notions essentielles de réadaptation, réhabilitation et réinsertion, les auteurs ouvrent la réflexion sur la réadaptation à partir d’une expérience clinique auprès de patients psychotiques chroniques en appartements thérapeutiques. Ils montrent comment le patient réaménage ses liens à son entourage et au monde social, à travers une réorganisation psychique parsemée de moments de crise: le patient doit progressivement se détacher de l’«enveloppe soignante» pour investir des enveloppes substitutives, avant de pouvoir intégrer un nouveau groupe constitutif de l’«enveloppe sociale»

The Receptor-Like Kinase SERK3/BAK1 Is Required for Basal Resistance against the Late Blight Pathogen Phytophthora infestans in Nicotiana benthamiana

BACKGROUND The filamentous oomycete plant pathogen Phytophthora infestans causes late blight, an economically important disease, on members of the nightshade family (Solanaceae), such as the crop plants potato and tomato. The related plant Nicotiana benthamiana is a model system to study plant-pathogen interactions, and the susceptibility of N. benthamiana to Phytophthora species varies from susceptible to resistant. Little is known about the extent to which plant basal immunity, mediated by membrane receptors that recognise conserved pathogen-associated molecular patterns (PAMPs), contributes to P. infestans resistance. PRINCIPAL FINDINGS We found that different species of Phytophthora have varying degrees of virulence on N. benthamiana ranging from avirulence (incompatible interaction) to moderate virulence through to full aggressiveness. The leucine-rich repeat receptor-like kinase (LRR-RLK) BAK1/SERK3 is a major modulator of PAMP-triggered immunity (PTI) in Arabidopsis thaliana and N. benthamiana. We cloned two NbSerk3 homologs, NbSerk3A and NbSerk3B, from N. benthamiana based on sequence similarity to the A. thaliana gene. N. benthamiana plants silenced for NbSerk3 showed markedly enhanced susceptibility to P. infestans infection but were not altered in resistance to Phytophthora mirabilis, a sister species of P. infestans that specializes on a different host plant. Furthermore, silencing of NbSerk3 reduced the cell death response triggered by the INF1, a secreted P. infestans protein with features of PAMPs. CONCLUSIONS/SIGNIFICANCE We demonstrated that N. benthamiana NbSERK3 significantly contributes to resistance to P. infestans and regulates the immune responses triggered by the P. infestans PAMP protein INF1. In the future, the identification of novel surface receptors that associate with NbSERK3A and/or NbSERK3B should lead to the identification of new receptors that mediate recognition of oomycete PAMPs, such as INF1.This work was supported by the Gatsby Charitable Foundation, BBSRC, Nuffield Foundation and the German Research Foundation (DFG). SS was supported by a personal research fellowship (SCHO1347/1-1). JPR is an Australian Research Council Future Fellow (FT0992129). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript

Plasticidad y evolutividad de los pacientes psicôticos en psicoterapia

International audienceThis writing maintains thé idea of change of psychic process with psychoticpatients. By proping up thé psychomerapy of a schizophrénie patient, thé authors show psychotic patient's évolution, byemphasizing thé modification of défensive mechanisms, of type of anguish, and thé transformation of status of deliriousideas. This évolution finds one of its expressions in thé relation with another ; so thé setting of therapeutic relation containsthé mark of it, as thé change of psychotic transfer and of clinician's psychic position bring out.Cet écrit soutient l'idée d'une plasticité du fonctionnement psychique des patients psychotiques. En s'étayant sur le suivid'un patient schizophrène, les auteurs montrent l'évolutivité du patient psychotique, en insistant sur la modification desmécanismes défensifs, du type d'angoisse et sur la transformation du statut des idées délirantes. Cette évolution trouve unede ses expressions dans la relation à un autre que soi ; le cadre de la relation psychothérapeutique en contient donc lamarque, comme le met en évidence le changement du transfert psychotique et du positionnement psychique du clinicien.El articule sostiene la idea de una plasticidad delfuncionamiento psfquico de los pacientes psicôticos. Basândose en el seguimiento de un paciente esquizofrénico, losautores muestran la evolutividad del paciente psicôtico, haciendo hincapié sobre la modificaciôn de los mécanismesdéfensives, del tipo de ansiedad y sobre la transformaciôn del estatuto de las ideas délirantes. Esta evoluciôn encuentra unade sus expresiones en la relaciôn a otro que a uno mismo; el marco de la relaciôn psicoterapéutica contiene la marca de ello,como lo demuestra el cambio de la transferencia psicôtica y el cambio del posicionamiento psfquico del terapeuta

Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks

We compute non-perturbatively the B-parameters of the complete basis of four-fermion operators needed to study the Kaon oscillations in the SM and in its supersymmetric extension. We perform numerical simulations with two dynamical maximally twisted sea quarks at three values of the lattice spacing on configurations generated by the ETMC. Unwanted operator mixings and O(a) discretization effects are removed by discretizing the valence quarks with a suitable Osterwalder-Seiler variant of the Twisted Mass action. Operators are renormalized non-perturbatively in the RI/MOM scheme. Our preliminary result for BK(RGI) is 0.73(3)(3).Comment: 7 pages, 3 figures, 1 table, proceedings of the XXVII Int'l Symposyum on Lattice Field Theory (LAT2009), July 26-31 2009, Peking University, Beijing (China

Recent results from lattice calculations

Recent results from lattice QCD calculations relevant to particle physics phenomenology are reviewed. They include the calculations of strong coupling constant, quark masses, kaon matrix elements, and D and B meson matrix elements. Special emphasis is on the recent progress in the simulations including dynamical quarks.Comment: 13 pages, 8 figures, plenary talk at the 32nd International Conference on High-Energy Physics (ICHEP 2004), August 16-22, 2004, Beijing, Chin

The Mass of the Convective Zone in FGK Main Sequence Stars and the Effect of Accreted Planetary Material on Apparent Metallicity Determinations

The mass of the outer convective zone in FGK main sequence stars decreases dramatically with stellar mass. Therefore, any contamination of a star's atmosphere by accreted planetary material should affect hotter stars much more than cool stars. If recent suggestions that high metal abundances in stars with planets are caused by planetesimal accretion are correct, then metallicity enhancements in earlier-type stars with planets should be very pronounced. No such trend is seen, however.Comment: Submitted ApJ Letters March 26th; accepted April 30th. 12 pages, 2 figure