185 research outputs found
Muon g-2: Theory overview
No full textn this talk I reviewed the theoretical calculation of the anomalous magnetic moment of the muon in the Standard Model mainly as it has been presented in the White Paper, as well as the most recent developments on the data-driven side, but in particular for what concerns
lattice calculations of hadronic vacuum polarization and hadronic light-by-light. All this is presented in the light of the new measurement of (g−2)μ recently released by the Fermilab experiment, which led to an increase of the discrepancy with the Standard Model from
3.7 to 4.2σ
Data-driven approaches to the evaluation of hadronic contributions to the (
No full textIn this talk I reviewed the data-driven theoretical calculation of the hadronic contributions to the anomalous magnetic moment of the muon in the Standard Model mainly as it has been presented in the White Paper, but also including the most recent developments. All this is presented in the light of the new measurement of (g − 2)μ recently released by the Fermilab experiment, which led to an increase of the discrepancy with the Standard Model from 3.7 to 4.2σ
FLAG phase 2: Status and prospects
No full textIn this talk I presented the FLAG initiative, discussed the history of the project, its aim and scope. After completing the first review in 2010, we decided to extend the review to more quantities and to involve a larger group of people. I have illustrated the phase 2 of the project, its new structure and the schedule for the release of the next review
Pion loops in quenched quantum chromodynamics
No full textWe calculate the divergences of the generating functional of quenched Chiral Perturbation Theory to one loop for a generic number of flavours. The flavour number dependence of our result enlightens the mechanism of quark loop cancellation in the quenched effective theory for any Green function or S matrix element. We also apply our results to ππ scattering and evaluate the coefficient of the chiral log in the S-wave scattering lengths for the quenched case.
LE MASCHERE E I NEMICI DELLE APPARENZE. JEAN STAROBINSKI INTERPRETE DEL TOTALITARISMO
No full textThis paper analyses the motives and the contents of the research carried out
by Jean Starobinski in the Forties on the theme of mask and simulation. After reconstructing
the historical context and the theoretical intention of Starobinski’s essay Interrogatoire du
masque (1946, republished 2015), the author examines the definition of the mask as an
essential element of interaction between nature and culture. He then discusses the interpretation
of modern culture as a project of demystification of appearances and search for true reality
beyond the masks. Finally, the author shows that the investigation of problems of simulation
and dissimulation is linked to the desire to understand the reasons for the success of totalitarianism.
According to Starobinski, in the Twentieth century dictatorial regimes have used the
rhetoric of authenticity to credit the mythical images of a human existence and a social order
finally free of any simulation, or any artifice of appearances
Responsabilità e democrazia. Winnicott interprete del dispositvo elettorale
No full textWinnicott's "Some Thoughts on the Meaning of the Word Democracy" is a problematic, layered work, which analyzes the importance of unconscious emotional factors in the election and removal of leaders. According to Winnicott, a true democracy exists only if a certain number of individuals, thanks to the secrecy of the vote, are capable of producing a psychic field in which the public sphere is brought back to interiority, so as to produce a specific individual responsibility. Voting is considered an intermediate zone of experience, to which both internal and external life contribute. The author shows the relationship that this interpretation of the democratic electoral system has with the concept of "transitional area"
Quenched chiral perturbation theory to one loop
No full textWe calculate the divergences of the generating functional of quenched chiral perturbation theory at one loop, and renormalize the theory by an appropriate definition of the counterterms. We show that the quenched chiral logarithms can be accounted for by defining a renormalized B0 parameter which, at lowest order, is proportional to the vacuum expectation value of the scalar quark density. Finally, we calculate several quantities at one loop to better analyze the modifications induced by quenching in the ultraviolet finite part of the one-loop corrections. We point out that some of the finite loop corrections may diverge in the chiral limit.
- …
