71,541 research outputs found
J. Lechner, El compromiso en la poesía española del siglo XX.
No full textZimmermann M.-C. J. Lechner, El compromiso en la poesía española del siglo XX.. In: Bulletin Hispanique, tome 74, n°3-4, 1972. pp. 526-529
Chern-kernels and anomaly cancellation in M-theory
No full textThis paper deals with magnetic equations of the type dH = J where the current
J is a –function on a brane worldvolume and H a p–form field strength. In many
situations in M–theory this equation needs to be solved for H in terms of a potential.
A standard universality class of solutions, involving Dirac–branes, gives rise
to strong intermediate singularities in H which in many physically relevant cases
lead to inconsistencies. In this paper we present an alternative universality class
of solutions for magnetic equations in terms of Chern–kernels, and provide relevant
applications, among which the anomaly–free effective action for open M2–branes
ending on M5–branes. The unobservability of the Dirac–brane requires a Dirac
quantization condition; we show that the requirement of “unobservability” of the
Chern–kernel leads in M–theory to classical gravitational anomalies which cancel
precisely their quantum counterparts
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Intersecting D-branes, Chern-kernels and the inflow mechanism
No full textWe analyse a system of arbitrarily intersecting D–branes in ten–
dimensional supergravity. Chiral anomalies are supported on the intersection branes,
called I–branes. For non–transversal intersections anomaly cancellation has been
realized until now only cohomologically but not locally, due to short–distance singularities.
In this paper we present a consistent local cancellation mechanism, writing
the –like brane currents as differentials of the recently introduced Chern–kernels,
J = dK. In particular, for the first time we achieve anomaly cancellation for dual
pairs of D–branes. The Chern–kernel approach allows to construct an effective action
for the RR–fields which is free from singularities and cancels the quantum anomalies
on all D–branes and I–branes
Mapping the political persona (PoliPers): A unified framework for ideal candidates’ and real politicians’ personality profiles
No full textSupplementary Material for the Preprint:
Lechner, C. M., Aichholzer, J., Birkenmaier, L., & Bluemke, M. (2025, January 27). Mapping the Political Personality (PoliPers): An Integrative Framework for Assessing Ideal and Actual Personality Profiles in Politicians. https://doi.org/10.31234/osf.io/w42p
Letter from Carl Hayden to M. J. Riordan
No full textLetter from Carl Hayden to M. J. Riordan expressing his support for Coconino County in turning over the Bright Angel Trail to the federal government
Mapping the political persona (PoliPers): A unified framework for ideal candidates’ and real politicians’ personality profiles
No full textSupplementary Material for the Preprint:
Lechner, C. M., Aichholzer, J., Birkenmaier, L., & Bluemke, M. (2025, January 27). Mapping the Political Personality (PoliPers): An Integrative Framework for Assessing Ideal and Actual Personality Profiles in Politicians. https://doi.org/10.31234/osf.io/w42p
Letter from M. J. Riordan, Arizona Lumber and Timber Company, to Carl Hayden
No full textLetter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail
Supplementary materials to: Combining sensors and surveys to study social interactions: A case of four science conferences
No full textSupplementary materials to: Génois, M., Zens, M., Oliveira, M., Lechner, C. M., Schaible, J., & Strohmaier, M. (2023). Combining sensors and surveys to study social interactions: A case of four science conferences. Personality Science, 4, Article e9957. https://doi.org/10.5964/ps.9957Venue plans and example of form of consent.unknownunknow
Supplementary materials [code] to: Combining sensors and surveys to study social interactions: A case of four science conferences
No full textSupplementary materials [code] to: Génois, M., Zens, M., Oliveira, M., Lechner, C. M., Schaible, J., & Strohmaier, M. (2023). Combining sensors and surveys to study social interactions: A case of four science conferences. Personality Science, 4, Article e9957. https://doi.org/10.5964/ps.9957Script to produce Figures 3 and 4.unknownunknow
- …
