4,364 research outputs found
Seasonal variations of the rate of multiple-muons in the Gran Sasso underground laboratory
It is well known that the rate of cosmic ray muons depends on the atmospheric
temperature, and that for events with a single muon the peak of the rate is in
summer, in underground laboratories in the northern hemisphere. In 2015 the
MINOS experiment, in USA, found that, for small distances between the
multiple-muons, the rate of multiple-muons peaks in the winter and that the
amplitude of the modulation is smaller than in the case of a single muon. I
have done a re-analysis of data of the past MACRO experiment. The result is
that under Gran Sasso the rate of multiple-muons at small distances peaks in
the summer. This difference with MINOS could be explained by differences in the
atmospheric temperature due to latitude. This results could be of interest for
dark matter experiments looking to dark matter seasonal modulation due to the
Earth's motion.Comment: presented to the RICAP 2016 conferenc
Schubert Calculus according to Schubert
We try to understand and justify Schubert Calculus the way Schubert did it.Comment: 17 pages in english, 7 figures. This is the english, extended version
of a previously posted preprint math.AG/040928
Multiplicative properties of Morin maps
In the first part of the paper we construct a ring structure on the rational
cobordism classes of Morin maps (i. e. smooth generic maps of corank 1). We
show that associating to a Morin map its singular strata defines a ring
homomorphism to \Omega_* \otimes \Q, the rational oriented cobordism ring.
This is proved by analyzing multiple-point sets of product immersion. Using
these homomorphisms we are able to identify the ring of Morin maps.
In the second part of the paper we compute the oriented Thom polynomial of
the singularity type with \Q coefficients. Then we provide a
product formula for the and the singularities.Comment: Corrected some small misprints and made lot of minor (mainly
grammatical) alterations. 10 page
New distributed offline processing scheme at Belle
The offline processing of the data collected by the Belle detector has been
recently upgraded to cope with the excellent performance of the KEKB
accelerator. The 127/fb of data (120 TB on tape) collected between autumn 2003
and summer 2004 has been processed in 2 months, thanks to the high speed and
stability of the new, distributed processing scheme. We present here this new
processing scheme and its performance.Comment: 4 pages, 8 figures, uses CHEP2004.cl
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