Fermilab muon g-2 experiment

The Fermilab muon g-2 experiment will measure the muon anomalous magnetic moment aμ to 140 ppb – a four-fold improvement over the earlier Brookhaven experiment. The measurement of aμ is well known as a unique test of the standard model with broad sensitivity to new interactions, particles and phenomena. The goal of 140 ppb is commensurate with ongoing improvements in the SM prediction of the anomalous moment and addresses the longstanding 3.5σ discrepancy between the BNL result and the SM prediction. In this article I discuss the physics motivation and experimental technique for measuring aμ, and the current status and the future work for the project.

Anomalous chromomagnetic moment of quarks

We do a perturbative calculation of the anomalous chromomagnetic dipole moment (CMDM) of quarks at one-loop, considering the effect of a small mass of the gluon. We find partial agreement with a previous calculation, as well as a divergence. We explain these results by noting that perturbation theory is not valid at the energy scales where these calculations were done, and proceed to give the results at the [Formula: see text] scale. We find significant variation, of the anomalous moment of the light quarks, as a function of gluon mass.

THE HADRONIC CONTRIBUTION TO THE MUON MAGNETIC ANOMALOUS MOMENT

Theoretical input, in the form of the operator product expansion, is used to quench the contribution of the e+e-data used to calculate the lowest-order hadronic contribution to the g-2 of the muon. This procedure reduces the current 3.6σ discrepancy between the experimental and theoretical results for the g-2 of the muon by 1.2σ. In addition, a clear discrepancy between the operator product expansion and the e+e-data is found.

CHRISTIANITY AND THE STATE OF SLAVERY IN JANE EYRE

POSTCOLONIAL READINGS OFJane Eyre have often highlighted the historical occlusion of West Indian slavery in the novel. Carl Plasa, for instance, argues thatPenny Boumelha points out that by her reckoning there are “ten explicit references to slavery in Jane Eyre. They allude to slavery in Ancient Rome and in the seraglio, to the slaveries of paid work as a governess and of dependence as a mistress. None of them refers to the slave trade upon which the fortunes of all in the novel are based” (62). While Jane Eyre's allusion to slavery in the seraglio is indeed the most precise historical allusion in the novel, critics working with general schemes of slave and imperial history have not been able to identify or unpack its topical reference to an anomalous moment in the history of British abolition of slavery. Like all of Jane's references to slavery, however, this allusion gains considerably in importance when read against that history, as I will demonstrate in this essay. I will also elaborate the generic and more broadly historical intertextuality of Jane's Gothic narratives of identification with the slave. By doing so, I disclose further meanings of slavery and empire in Jane Eyre, as well as the ways in which Gothic and heroic modes become a means, for Brontë and her characters alike, of articulating fraught racialized identifications and disavowals. Jane's growth of religious feeling, which Barbara Hardy has influentially suggested is taken “for granted” rather than demonstrated (66), is, I argue, grounded in her consciousness of the tensions between slavery and Christianity as they are played out in domestic and imperial spheres at a particular historical moment. That historical moment may be established through Brontë's allusions to slave rebellions and charters, and to a particular edition of Sir Walter Scott's poem Marmion.

ON MOMENT MAPS ASSOCIATED TO A TWISTED HEISENBERG DOUBLE

We review the concept of the (anomalous) Poisson–Lie symmetry in a way that emphasizes the notion of Poisson–Lie Hamiltonian. The language that we develop turns out to be very useful for several applications: we prove that the left and the right actions of a group G on its twisted Heisenberg double (D, κ) realize the (anomalous) Poisson–Lie symmetries and we explain in a very transparent way the concept of the Poisson–Lie subsymmetry and that of Poisson–Lie symplectic reduction. Under some additional conditions, we construct also a non-anomalous moment map corresponding to a sort of quasi-adjoint action of G on (D, κ). The absence of the anomaly of this "quasi-adjoint" moment map permits to perform the gauging of deformed WZW models.