562 citations · 1.2k across the 18 of their papers we have counts for
20 papers
The dead-cone effect in charm, bottom and top quark jets in angular and momentum space
Redamy Perez-Ramos, Stefan Kluth, Wolfgang Ochs
The dead-cone effect reflects the mass dependence of QCD radiation from heavy quarks. We investigate this phenomenon from charm and bottom to top quarks using two-dimensional angul…
The Dead Cone Effect in Heavy-Quark Jets: A Unified Study from Charm and Bottom to Top
Redamy Perez-Ramos, Stefan Kluth, Wolfgang Ochs
We present a unified overview of recent progress in the study of QCD radiation in heavy-quark jets, focusing on the dead-cone effect. Using precision data from LEP at $\sqrt{s}=91.…
How to identify the dead cone in the top-quark jet
Stefan Kluth, Wolfgang Ochs, Redamy Perez-Ramos
The gluon emission from an energetic heavy quark is suppressed in the forward direction below the angle for a quark of mass and energy according to pert…
The dead cone effect in heavy quark jets observed in momentum space and its QCD explanation
Stefan Kluth, Wolfgang Ochs, Redamy Perez Ramos
The production of a heavy quark is accompanied by gluon bremsstrahlung with angular and momentum spectra predicted by perturbative Quantum Chromo Dynamics (QCD). The radiation off…
Dead cone effect in charm and bottom quark jets
Stefan Kluth, Wolfgang Ochs, Redamy Perez-Ramos
The evolution of a heavy quark initiated jet is mainly ruled by gluon bremsstrahlung. As a consequence of the dead-cone effect, this radiation is suppressed in the forward directio…
Observation of the dead cone effect in charm and bottom quark jets and its QCD explanation
Stefan Kluth, Wolfgang Ochs, Redamy Perez Ramos
The production of a heavy quark is accompanied by gluon bremsstrahlung which is suppressed at small angles for mass and high energy according to perturb…
High-precision measurements from LHC to FCC-ee
David d'Enterria, Peter Z. Skands, S. Alekhin +30
This document provides a writeup of all contributions to the workshop on "High precision measurements of : From LHC to FCC-ee" held at CERN, Oct. 12--13, 2015. The workshop ex…
Measurement of observables sensitive to coherence effects in hadronic Z decays with the OPAL detector at LEP
Nadine Fischer, Stefan Gieseke, Stefan Kluth +3
A study of QCD coherence is presented based on a sample of about 397000 hadronic annihilation events collected at GeV with the OPAL detector at LEP. The stud…
World Summary of (2012)
Siegfried Bethke
Determinations of the strong coupling strength, , are summarised and a new world average value of is determined, using a new method of pre-averaging results within…
Observation of CP violation in the B^0 meson system
B. Aubert, BABAR Collaboration
We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result use…
Measurement of CP-violating asymmetries in B0 decays to CP eigenstates
The BABAR Collaboration, B. Aubert
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23 million Upsilon(4S)-->B-a…
Measurements of Flavour Dependent Fragmentation Functions in Z^0 -> qq(bar) Events
The OPAL Collaboration, K. Ackerstaff et al
Fragmentation functions for charged particles in Z -> qq(bar) events have been measured for bottom (b), charm (c) and light (uds) quarks as well as for all flavours together. The r…
Search for an Excess in the Production of Four-Jet Events from e^+e^- Collisions at \sqrt{s} = 130-184 GeV
The OPAL Collaboration, K. Ackerstaff et al
Events with four distinct jets from e^+e^- collisions, collected by the OPAL detector at centre-of-mass energies between 130 and 184 GeV, are analysed for a peak in the sum of dije…
Production of f_0(980), f_2(1270) and ϕ(1020) in hadronic Z^0 decay
The OPAL Collaboration, K. Ackerstaff et al
Inclusive production of the f_0(980), f_2(1270) and ϕ(1020) resonances has been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL experiment at LEP. A coupled ch…
Search for a Massive Di-photon Resonance at sqrt{s} = 91-172 GeV
The OPAL Collaboration, K. Ackerstaff et al
A search for the resonant production of high mass photon pairs associated with a leptonic or hadronic system has been performed using a total data sample of 25.7 pb^-1 taken at cen…
Measurement of the Photon Structure Function F_2^gamma at Low x
The OPAL Collaboration, K. Ackerstaff et al
Deep inelastic electron-photon scattering is studied using e+e- data collected by the OPAL detector at centre-of-mass energies sqrt{s_ee} ~ M_{Z^0}. The photon structure function F…
A Measurement of the B_s^0 Lifetime using Reconstructed D_s^- Mesons
The OPAL Collaboration, K. Ackerstaff et al
We report a measurement of the B^0_s meson lifetime from B_s^0 -> D^-_s X decays, where D_s^- mesons are reconstructed in the D_s^- -> phi pi^- and D_s^- -> K^{*0} K^- decay channe…
Spin alignment of leading K*(892)^0 mesons in hadronic Z^0 decays
The OPAL Collaboration, K. Ackerstaff et al
Helicity density matrix elements for inclusive K*(892)^0 mesons from hadronic Z^0 decays have been measured over the full range of K^*0 momentum using data taken with the OPAL expe…
Measurement of f(c -> D^*+ X), f(b -> D^*+ X) and Gamma_cc(bar)/Gamma_had using D^*+/- Mesons
The OPAL Collaboration, K. Ackerstaff et al
The production rates of D^*+/- mesons in charm and bottom events at centre-of-mass energies of about 91 GeV and the partial width of primary cc(bar) pairs in hadronic Z^0 decays ha…
A Study of B Meson Oscillations Using Hadronic Z^0 Decays Containing Leptons
The OPAL Collaboration, K. Ackerstaff et al
An event sample enriched in semileptonic decays of b hadrons is selected using an inclusive lepton selection from approximately 3.0 million hadronic Z^0 decays collected with the O…