34,596 research outputs found
Modules with irrational slope over tubular algebras
Let be a tubular algebra and let be a positive irrational. Let
be the definable subcategory of -modules of slope . Then
the width of the lattice of pp formulas for is . It
follows that if is countable then there is a superdecomposable
pure-injective module of slope .Comment: minor corrections/improvements to argument
Peak finding through Scan Statistics
We discuss the conditions under which Scan Statistics can be fruitfully
implemented to signal a departure from the underlying probability model that
describes the experimental data. It is shown that local perturbations
(``bumps'' or ``excesses'' of events) are better dealt within this framework
and, in general, tests based on these statistics provide a powerful and
unbiased alternative to the traditional techniques related with the chi2 and
Kolmogorov distributions. Approximate formulas for the computation of Scan
Statistics in the range of interest for high energy and nuclear physics
applications are also presented.Comment: 14 pages, 5 figures, to appear in Nucl.Instrum.Meth.
Search for the Cryptoexotic Member of the Baryon Antidecuplet 1/2+ in the Reactions pi- p --> pi- p and pi- p --> K L
The main goal of this proposal is the search for a narrow cryptoexotic
nucleon resonance by scanning of the pi- p system invariant mass in the region
(1610-1770) MeV with the detection of pi- p and K Lambda decays. The scan is
supposed to be done by the variation of the incident pi- momentum and its
measurement with the accuracy of up to +-0.1% (better than 1 MeV in terms of
the invariant mass in the whole energy range) with a set of proportional
chambers located in the first focus of the magnetooptical channel. High
sensitivity of the method to the resonance under search is shown. The secondary
particles scattered from a liquid hydrogen target are detected by sets of the
wire drift chambers equipped with modern electronics. The time scale of the
project is about 3 years. The budget estimate including manpower, the apparatus
and operation cost, is about 40 million rubles. The beam time required is (4-6)
two week runs on "high" (10 GeV/c) flattop of the ITEP proton synchrotron.Comment: 16 pages, 10 figures. v2: an acknowledge adde
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