1,479 research outputs found
Impacts of SB2009 on the Higgs Recoil Mass Measurement Based on a Fast Simulation Algorithm for the ILD Detector
This proceeding reports a study of the impacts of the SB2009 beam parameters
on the Higgs recoil mass and Higgs-Strahlung cross-section measurements based
on a dedicated fast simulation algorithm of the ILD detector. The study shows
worse results from SB2009 beam parameters than the previous RDR beam
parameters, because of the smaller luminosity. However, Travel Focus (TF)
technology can recover the degradation to certain level.Comment: LCWS2010 proceeding, 7 pages, 6 figure
Higgs Recoil Mass and Higgs-Strahlung Cross-Section Study for the ILD LOI
This proceeding summarizes the Higgs recoil mass and Higgs-strahlung
cross-section study done for the Letter of Intent (LOI) of the International
Large Detector (ILD) Concept. Assuming a Higgs mass of 120 GeV, working at 250
GeV center of mass energy with beam parameters RDR250 and beam polarization,
this full simulation study predicts that, the ILD detector can achieve 37 MeV
precision on the Higgs mass measurement and 3.3% on the cross-section
measurement from the muon channel, while 83 MeV and 4.9% from the electron
channel, if we have 250 inverse fb integrated luminosity.Comment: LCWS2010 Proceeding, 7 pages, 8 figure
Measurement of the W boson mass with 4.3 fb^-1 of D0 Run II data
A measurement of the W boson mass using 4.3 fb^-1 of integrated luminosity
collected with the D0 detector during Run II of the Fermilab Tevatron collider
is presented. Based on a sample of 1.68 * 10^6 W->enu candidate events, the W
boson mass is measured to be M_W = 80.367 +/- 0.026 GeV. Combining this result
with an earlier D0 result determined using an independent Run II data sample of
1 fb^-1 of integrated luminosity, yields M_W = 80.375 +/- 0.023 GeV.Comment: 8 pages, 7 figures, proceedings for Moriond EW 201
Probing the valence quark region of nucleons with Z bosons at LHCb
In this high- region, both the flavour content and structure of the
nucleon parton distribution functions remains relatively poorly known. New LHCb
measurements of Z and charm jet associated production could indicate a
valence-like intrinsic-charm component in the proton wave function, and
measurements of Z production in pPb collisions provide new constraints on the
partonic structure of nucleons bound inside nuclei. Here we will discuss these
new LHCb measurements and comparisons with state-of-the-art parton distribution
function calculations.Comment: 4 pages, 19 figures, proceedings for the 20th International
Conference on Strangeness in Quark Matter (SQM2022
Recent advances in the production of γ-valerolactone from biomass-derived feedstocks via heterogeneous catalytic transfer hydrogenation
γ-valerolactone (GVL) is an important intermediate chemical with a wide range of applications as fuel, fuel additive and as a green solvent which has received a great deal of attentions from both academia and industry. This review aims to summarise the advances in conversion of renewable feedstocks into GVL through heterogeneous catalytic transfer hydrogenation (CTH) with a strong emphasis on discussing preparation, characterisation and performance of the catalysts in order to provide a better understanding of various catalytic systems and also to compare them in terms of catalytic performance
Conversion of biomass platform molecules into fuel additives and liquid hydrocarbon fuels
[EN] In this work some relevant processes for the preparation of liquid hydrocarbon fuels and fuel additives
from cellulose, hemicellulose and triglycerides derived platform molecules are discussed. Thus, it is
shown that a series of platform molecules such as levulinic acid, furans, fatty acids and polyols can be
converted into a variety of fuel additives through catalytic transformations that include reduction, esterification,
etherification, and acetalization reactions. Moreover, we will show that liquid hydrocarbon fuels
can be obtained by combining oxygen removal processes (e.g. dehydration, hydrogenolysis, hydrogenation,
decarbonylation/descarboxylation etc.) with the adjustment of the molecular weight via C C coupling
reactions (e.g. aldol condensation, hydroxyalkylation, oligomerization, ketonization) of the reactive
platform molecules.This work has been supported by the Spanish Government-MINECO through Consolider Ingenio 2010-Multicat and CTQ.-2011-27550, ITQ thanks the "Program Severo Ochoa" for financial support.Climent Olmedo, MJ.; Corma Canós, A.; Iborra Chornet, S. (2014). Conversion of biomass platform molecules into fuel additives and liquid hydrocarbon fuels. Green Chemistry. 16(2):516-547. https://doi.org/10.1039/c3gc41492bS51654716
Study of the decay
The decay is studied
in proton-proton collisions at a center-of-mass energy of TeV
using data corresponding to an integrated luminosity of 5
collected by the LHCb experiment. In the system, the
state observed at the BaBar and Belle experiments is
resolved into two narrower states, and ,
whose masses and widths are measured to be where the first uncertainties are statistical and the second
systematic. The results are consistent with a previous LHCb measurement using a
prompt sample. Evidence of a new
state is found with a local significance of , whose mass and width
are measured to be and , respectively. In addition, evidence of a new decay mode
is found with a significance of
. The relative branching fraction of with respect to the
decay is measured to be , where the first
uncertainty is statistical, the second systematic and the third originates from
the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb
public pages
Measurement of the ratios of branching fractions and
The ratios of branching fractions
and are measured, assuming isospin symmetry, using a
sample of proton-proton collision data corresponding to 3.0 fb of
integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The
tau lepton is identified in the decay mode
. The measured values are
and
, where the first uncertainty is
statistical and the second is systematic. The correlation between these
measurements is . Results are consistent with the current average
of these quantities and are at a combined 1.9 standard deviations from the
predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb
public pages
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