12 research outputs found
Study of the production of A(b)(0) and (B)over-bar(0) hadrons in pp collisions and first measurement of the A(b)(0)-> J/psi pK(-) branching fraction
The product of the A(b)(0) ((B) over bar (0)) differential production
cross-section and the branching fraction of the decay A(b)(0)-> J/psi
pK(-) ((B) over bar (0)-> J/psi p (K) over bar*(892)(0)) is measured
as a function of the beauty hadron transverse momentum, p(T), and
rapidity, y. The kinematic region of the measurements is p(T) <20 GeV/c
and 2.0 < y < 4.5. The measurements use a data sample corresponding to
an integrated luminosity of 3fb(-1) collected by the LHCb detector in pp
collisions at centre-of-mass energies root s=7 TeV in 2011 and root s=8
TeV in 2012. Based on previous LHCb results of the fragmentation
fraction ratio, f(Ab0)/f(d), the branching fraction of the decay
A(b)(0)-> J/psi pK(-) is measured to be
B(A(b)(0)-> J/psi pK(-))=(3.17 +/- 0.04 +/- 0.07 +/-
0.34(-0.28)(+0.45))x10(-4)
where the first uncertainty is statistical, the second is systematic,
the third is due to the uncertainty on the branching fraction of the
decay (B) over bar (0)-> J/psi p (K) over bar*(892)(0), and the fourth
is due to the knowledge of f(Ab0)/f(d). The sum of the asymmetries in
the production and decay between A(b)(0) and (A) over bar (0)(b) is also
measured as a function of p(T) and y. The previously published branching
fraction of A(b)(0)-> J/psi p pi(-), relative to that of A(b)(0)-> J/psi
pK(-), is updated. The branching fractions of A(b)(0)-> P-c(+)(-> J/psi
p)K- are determined
Change in alcohol outlet density and alcohol-related harm to population health (CHALICE)
Excess alcohol consumption has serious adverse effects on health and violence-related harm. In the UK around 37% of men and 29% of women drink to excess and 20% and 13% report binge drinking. The potential impact on population health from a reduction in consumption is considerable. One proposed method to reduce consumption is to reduce availability through controls on alcohol outlet density. In this study we investigate the impact of a change in the density of alcohol outlets on alcohol consumption and alcohol-related harms to health in the community