Results 81 to 90 of about 29,834,971 (168)

Positivity from J-Basis operators in the standard model effective Field Theory

Journal of High Energy Physics
In the effective field theory (EFT), the positivity bound on dim-8 effective operators tells us that the s 2 contribution in the scattering amplitude of 2-to-2 process geometrically corresponds to the convex cone composed of the ultraviolet (UV) states ...
Chengjie Yang, Zhe Ren, Jiang-Hao Yu
doaj   +1 more source

The weak instrument problem of the system GMM estimator in dynamic panel data models [PDF]

The system GMM estimator for dynamic panel data models combines moment conditions for the model in first differences with moment conditions for the model in levels. It has been shown to improve on the GMM estimator in the first differenced model in terms
Frank Windmeijer, Maurice Bun
core  

Complete UV resonances of the dimension-8 SMEFT operators

Journal of High Energy Physics
The effective field theory approach parameterizes the low energy behaviors of all possible ultraviolet (UV) theories in a systematic way. One of the most important tasks is thus to find the connection between the effective operators and their UV origins.
Hao-Lin Li, Yu-Han Ni, Ming-Lei Xiao, Jiang-Hao Yu   +3 more
doaj   +1 more source

Conveni de col·laboració entre Barcelona de Serveis Municipals, SA. (BSM) i PALLAPUPAS [PDF]

Aprovat entre Barcelona de Serveis Municipals, SA.
Barcelona de Serveis Municipals, S.A. (BSM)
core  

Bootstrap and Higher-Order Expansion Validity When Instruments May Be Weak [PDF]

It is well-known that size-adjustments based on Edgeworth expansions for the t-statistic perform poorly when instruments are weakly correlated with the endogenous explanatory variable.
Gustavo A. Suarez, Marcelo J. Moreira, Jack R. Porter   +2 more
core   +2 more sources

Measuring the polarization of boosted, hadronic W bosons with jet substructure observables

Journal of High Energy Physics
In this work, we present a new technique to measure the longitudinal and transverse polarization fractions of hadronic decays of boosted W bosons. We introduce a new jet substructure observable denoted as p θ , which is a proxy constructed purely out of ...
Songshaptak De, Vikram Rentala, William Shepherd   +2 more
doaj   +1 more source

Weak Scale Effects in Growth Models [PDF]

Growth models of the second generation type, e.g. the Jones (1995) or Young (1998) model, all exhibit a so called weak scale effect in per capita production, i.e. larger economies should have a higher per capita production than smaller economies. However,
Juergen Antony
core  

Weak scale supersymmetry [PDF]

, 1990
An introduction to the ideas and current state of weak scale supersymmetry is given. It is shown that LEP data on Z decays has already excluded two of the most elegant models of weak scale supersymmetry.
Hall, L. J., Hall, L.J.
core  

Systematic decomposition of dimension-11 short-range neutrinoless double beta decay operators

Journal of High Energy Physics
Neutrinoless double beta decay (0νββ) may receive sizable contributions from short-range physics beyond the Standard Model. We present a systematic classification of all tree-level ultraviolet completions of the dimension-11 short-range 0νββ decay ...
Shi-Yu Li, Gui-Jun Ding
doaj   +1 more source

CP violation in Σ+ → pℓ + ℓ − within the standard model and beyond

Journal of High Energy Physics
The LHCb collaboration has recently observed the rare hyperon decay Σ+ → pμ + μ −. It can also measure the corresponding antihyperon channel with comparable precision and is thus in a position to extract information on CP violation in this mode ...
Xiao-Gang He, Jusak Tandean, German Valencia   +2 more
doaj   +1 more source