نتایج جستجو برای: cross section dependence

تعداد نتایج: 759052  

2003
Nikolaos Kidonakis Ramona Vogt

We calculate next-to-next-to-leading order soft-gluon corrections to top quark total and differential cross sections in hadron colliders. We increase the accuracy of our previous estimates by including additional subleading terms, including next-to-next-to-next-toleading-logarithmic and some virtual terms. We show that the kinematics dependence of the cross section vanishes near threshold and i...

Journal: :Physics Letters B 2023

We discuss in detail the dependence of Gallium Anomaly on detection cross section. provide updated values size and find that its significance is larger than about $5\sigma$ for all section models. assumed value half life ${}^{71}\text{Ge}$, which determines sections transitions from ground state ${}^{71}\text{Ga}$ to ${}^{71}\text{Ge}$. show a ${}^{71}\text{Ge}$ standard one can reduce or even ...

2004
V. K. Magas L. Roca E. Oset

We perform calculations for the production of φ mesons in nuclei at energies just above threshold and study the A dependence of the cross section. We use results for the φ selfenergy in the medium obtained within a chiral unitary approach. We find a strong A dependence which is tied to the distortion of the incident proton and to the absorption of the φ in its way out of the nucleus. The effect...

Journal: :Journal of Econometrics 2021

This paper proposes a novel Lasso-based approach to handle unobserved parameter heterogeneity and cross-section dependence in nonstationary panel models. In particular, penalized principal component (PPC) method is developed estimate group-specific long-run relationships common factors jointly identify the unknown group membership. The PPC estimators are shown be consistent under weakly depende...

A. Eskandari-asl

The one photon absorption (OPA) cross section of a current carrying two-orbital quantum dot (QD) with strong electron-phonon interaction (polaron regime) is considered. Using the self-consistent non-equilibrium Hartree-Fock (HF) approximation, we determine the dependence of OPA cross section on the applied bias voltage, the strength of effective electron-electron interaction, and level spacing ...

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