Results 11 to 20 of about 714,365 (218)
Electric dipole moments of baryons with bottom quarks [PDF]
Physical Review D, 2022 Triggered by experimental prospects to measure electromagnetic dipole moments of baryons containing a bottom quark, we calculate the CP-odd electric dipole moments (EDMs) of spin-1/2 single-bottom baryons.
Hanhart, Christoph +7 more
core +8 more sources
Fragmentation of bottom quarks in top quark decay
, 2004 We review the main aspects of the fragmentation of bottom quarks in top quark decay. The NLO b-quark energy spectrum presents large mass logarithms ln(m_t^2/m_b^2), which can be resummed by the use of the approach of perturbative fragmentation functions.
Corcella, Gennaro
core +3 more sources
Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in s√=8 TeV pp collisions with the ATLAS detector [PDF]
, 2013 The results of a search for pair production of supersymmetric partners of the Standard Model third-generation quarks are reported. This search uses 20.1 fb−1 of pp collisions at s√=8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The
Farrington, Sinead +6 more
core +6 more sources
Bottom-quark fragmentation in top-quark decay [PDF]
Nuclear Physics B, 2002 We study the fragmentation of the b quark in top decay in NLO QCD, within the framework of perturbative fragmentation, which allows one to resum large logarithms $\sim\log (m_t^2/m_b^2)$. We show the b-energy distribution, which we compare with the exact ${\cal O} (α_S)$ result for a massive b quark.
Corcella, Gennaro, Mitov, Alexander D.
openaire +2 more sources
Top-Quark Mass and Bottom-Quark Decay [PDF]
Physical Review Letters, 1983 The possibility of a long B-meson lifetime is explored, in which case the weak mixing angles θ_2 and θ_3 are quite small. This allows the derivation of a lower bound on the top-quark mass as a function of the B-meson lifetime, by comparison of the short-distance prediction for the CP-nonconservation parameter e with its experimental value. The bound is
Paul H. Ginsparg +2 more
openaire +1 more source
Heavy quark effective theory computation of the mass of the bottom quark [PDF]
Journal of High Energy Physics, 2007 We present a fully non-perturbative computation of the mass of the b-quark in the quenched approximation. Our strategy starts from the matching of HQET to QCD in a finite volume and finally relates the quark mass to the spin averaged mass of the Bs meson in HQET. All steps include the terms of order Lambda^2/Mb.
Michele Della Morte +3 more
openaire +5 more sources
Bottom quark mass with calibrated uncertainty
The European Physical Journal C, 2022 AbstractWe determine the bottom quark mass $${\hat{m}}_b$$ m ^ b from QCD sum rules of moments of the vector current correlator calculated in perturbative QCD to $${{\mathcal {O}}} ({\hat ...
Erler, Jens +2 more
openaire +3 more sources
Charm and bottom quark masses: An update [PDF]
Physical Review D, 2009 Using new four-loop results for the heavy quark vacuum polarization and new data for bottom quark production in electron-positron annihilation, an update on the determination of charm- and bottom-quark masses through sum rules has been performed. The previous result for the charm-quark mass, $m_c(3 {\rm GeV})= 0.986(13) {\rm GeV}$, based on the lowest ...
Chetyrkin, K. G. +6 more
openaire +2 more sources
Single bottom quark production in k ⊥-factorisation [PDF]
Journal of High Energy Physics, 2015 We present a study within the kT-factorisation scheme on single bottom quark production at the LHC. In particular, we calculate the rapidity and transverse momentum differential distributions for single bottom quark/anti-quark production. In our setup, the unintegrated gluon density is obtained from the NLx BFKL Green function whereas we included mass ...
Chachamis, Grigorios +4 more
openaire +4 more sources
A phenomenological study of bottom-quark fragmentation in top-quark decay [PDF]
The European Physical Journal C, 2009 Top-quark physics is one of the main fields of investigation at the Tevatron accelerator and, ultimately, at the LHC. We perform a phenomenological analysis of ttbar events at hadron colliders, with a focus on observables relying on bottom-quark fragmentation in top-quark decay.
Corcella, Gennaro, Mescia, Federico
openaire +2 more sources