6,678 research outputs found
Exclusive MSSM Higgs production at the LHC after Run I
We investigate the prospects for Central Exclusive Production (CEP) of MSSM
Higgs bosons at the LHC using forward proton detectors proposed to be installed
at 220 m and 420 m distance around ATLAS and / or CMS. We summarize the
situation after the first and very successful data taking period of the LHC.
The discovery of a Higgs boson and results from searches for additional MSSM
Higgs bosons from both the ATLAS and CMS experiments, based on data samples
each corresponding to about 25 fb-1, have recently led to a proposal of new
low-energy MSSM benchmark scenarios. The CEP signal cross section for the
process H/h -> bb and its backgrounds are estimated in these new scenarios. We
also make some comments about the experimental procedure if the proposed
forward proton detectors are to be used to measure the CEP signal.Comment: 21 pages, 10 figures. Changes reflecting the review process in
submission to EPJC: minor textual improvements, plots 1-6 with a more
appropriate range on y-axis, added reference
Elliptic rook and file numbers
Utilizing elliptic weights, we construct an elliptic analogue of rook numbers
for Ferrers boards. Our elliptic rook numbers generalize Garsia and Remmel's
q-rook numbers by two additional independent parameters a and b, and a nome p.
These are shown to satisfy an elliptic extension of a factorization theorem
which in the classical case was established by Goldman, Joichi and White and
later was extended to the q-case by Garsia and Remmel. We obtain similar
results for our elliptic analogues of Garsia and Remmel's q-file numbers for
skyline boards. We also provide an elliptic extension of the j-attacking model
introduced by Remmel and Wachs. Various applications of our results include
elliptic analogues of (generalized) Stirling numbers of the first and second
kind, Lah numbers, Abel numbers, and r-restricted versions thereof.Comment: 45 pages; 3rd version shortened (elliptic rook theory for matchings
has been taken out to keep the length of this paper reasonable
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