19,375 research outputs found
High Level Trigger Using ALICE ITS Detector
The high trigger capabilities of the ALICE inner tracking system (ITS)
as a standalone detector have been investigated. Since the high charged
particles mostly lead to the linear trajectories within this ITS sector, it is
possible to select tracks of of the order of 2 GeV and above by confining
to a narrow search window in the () space. Also shown that by
performing a principal component transformation, it is possible to rotate from
a 12 dimensional (-) space (in this space, a good ITS track has 6
pairs of hit co-ordinates) into a parametric space characterized by only two
independent components when the track momentum exceeds a particular limit. This
independent component analysis (ICA) has been uitilised further to reduce the
false track contribution to an acceptable level particularly when the charged
multiplicity is large. Finally, it is shown that with a narrow bin width of
radian and with PCA or ICA cut, the
ITS can be used to trigger the jet particles with GeV. Apart from
triggering these high particles, this method can also be used to estimate
the initial momentum of the high tracks for seeding which can be further
prolonged into the TPC detector both for offline and online Kalman tracking or
even to detect those high tracks of rare events which might get lost in
the TPC-TRD dead zone.Comment: 20 pages, 10 figure
Unequal Access: Immigrants and U.S. Health Care
Despite the important role that immigrants play in the U.S. economy, they disproportionately lack health insurance and receive fewer health services than native-born Americans. Some policymakers have called for limits on immigrants' access to health insurance, particularly Medicaid, which are even more stringent than those already in place. However, policies that restrict immigrants' access to some health care services lead to the inefficient and costly use of other services (such as emergency room care) and negatively impact public health
Neutrino and astroparticle physics : Working group report
The contributions made to the Working Group activities on neutrino and
astroparticle physics are summarised in this article. The topics discussed were
leptogenesis in Left-Right symmetric model, inflationary models in
Raman-Sundrum scenarios, ultra high energy cosmic rays and neutrino
oscillations in 4 flavour and decaying neutrino models.Comment: 11 pages; arXiv copy of contribution to WHEPP-6 proceeding
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