151 research outputs found
Contributions of flavor violating couplings of a Higgs boson to
We study contributions to in models with a new Higgs boson, , and a
neutral lepton, , with couplings and
through the process . Contrary to naive expectations, we find
that contributions to can be very large while satisfying constraints
from standard and searches. Even the excess
observed by ATLAS in , if taken at face value, can be easily
accommodated. The various kinematic distributions fit nicely the experimentally
determined ones. This scenario can arise for example in a two Higgs doublet
model with vectorlike leptons.Comment: 16 pages, 5 figure
Emerging lattice approach to the K-Unitarity Triangle
It has been clear for past many years that in low energy observables new
physics can only appear as a perturbation. Therefore precise theoretical
predictions and precise experimental measurements have become mandatory. Here
we draw attention to the significant advances that have been made on the
lattice in recent years in , , the long-distance part
of and rare K-decays. Thus, in conjunction with experiments, the
construction of a unitarity triangle purely from Kaon physics should soon
become feasible. Along with the B-unitarity triangle, this should allow for
more stringent tests of the Standard Model and tighter constraints on new
physics.Comment: 9 pages, 6 figures, Version to appear on PL
Pojavljanje pajka Amaurobius ferox v jamah
Subterranean habitats house a wide range of species which show a number of adaptations to prevailing ecological conditions. Spiders are among the most abundant predators in caves; however, most studies on cave spiders focus on species adapted to these habitats. This is the first study related to the occurrence of the Black lace-weaver spider, Amaurobius ferox, in caves. The species lacks adaptations to the subterranean habitats and has been observed within meters from the cave entrance all year round, except in late winter until early spring. Furthermore, its occupancy is positively related to the presence of other three cave-dwelling spiders: Metellina merianae, Meta menardi and Tegenaria sp.V različnih podzemnih habitatih živijo številne živalske vrste, ki so bolj ali manj prilagojene na razmere tamkajšnjega okolja. V jamah so pajki med najštevilčnejšimi plenilci, a večina študij je omejenih na tiste vrste, ki so že izrazito prilagojene na podzemlje. Pajek Amaurobius ferox ne sodi mednje, v študiji pa je obravnavano njegovo pojavljanje vzdolž jam. Ta površinska vrsta se pojavlja le v vhodih delih jam v vseh letnih časih, z izjemo pozne zime do začetka pomladi. Njeno pojavljanje v teh delih je povezano s prisotnostjo treh v jamah prebivajočih vrst, in sicer pajkov Metellina merianae, Meta menardi in Tegenaria sp
Summary of the CKM 2016 working group on rare decays
Rare , , and decays offer unique opportunities to probe for
evidence of new particles from physics beyond the Standard Model at mass scales
extending from the electroweak scale to well above those directly accessible at
the LHC. We review a selection of theoretical and experimental results on rare
, , and decays illustrating the progress made during the past two
years.Comment: 15 pages, 3 figures. To appear in the proceedings of the 9th
International Workshop on the CKM Unitarity Triangle, Nov 28- Dec 2 2016,
Mumba
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