177 research outputs found
excited states within a HQSS model
We have reviewed the renormalization procedure used in the unitarized
coupled-channel model of Phys. Rev. D85 114032 (2012), and its impact in the
, , and sector, where five states have been
recently observed by the LHCb Collaboration. The meson-baryon interactions used
in the model are consistent with both chiral and heavy-quark spin symmetries
and lead to a successful description of the observed lowest-lying odd parity
resonances and , and and
resonances. We show that some (probably at least three) of
the states observed by LHCb will also have odd parity and spins and
, belonging two of them to the same HQSS multiplets that the latter strangenessless
heavy baryons.Comment: 11 pages, 3 figures, 6 tables, published in The European Physical
Journal
and excited states within a HQSS model
We study odd parity and resonances using a unitarized
coupled-channel framework based on a HQSS-extended
Weinberg-Tomozawa baryon-meson interaction, while paying a special attention to
the renormalization procedure. We predict a large molecular
component for the with a dominant light-degree-of-freedom
spin configuration. We discuss the differences between the
and states, and conclude that they cannot be
SU(3) siblings, whereas we predict the existence of other states, two
of them related to the two-pole structure of the . It is of
particular interest a pair of and poles, which form a HQSS
doublet and that we tentatively assign to the and ,
respectively. Within this picture, the would be part of a SU(3)
sextet, containing either the or the , and
that would be completed by the . Moreover, we identify a
sextet with the state and the recently discovered
. Assuming the equal spacing rule and to complete this
multiplet, we predict the existence of a odd parity state,
with a mass of 6360 MeV and that should be seen in the channel.Comment: 13 pages, 5 figures, 4 table
Genomic tools for the conservation and genetic improvement of a highly fragmented breed : the ramo grande cattle from the Azores
Research Areas: Agriculture ; Veterinary Sciences ; ZoologyRamo Grande is a local cattle breed raised in the archipelago of Azores, with a small
and dispersed census, where inbreeding control is of utmost importance. A single nucleotide
polymorphism (SNP) Beadchip array was used to assess inbreeding, by analysis of genomic regions
harboring contiguous homozygous genotypes named runs of homozygosity (ROH), and to estimate
past e ective population size by analysis of linkage disequilibrium (LD). Genetic markers associated
with production traits were also investigated, exploiting the unique genetic and adaptation features
of this breed. A total of 639 ROH with length >4 Mb were identified, with mean length of 14.96 Mb.
The mean genomic inbreeding was 0.09, and long segments of ROH were common, indicating recent
inbred matings. The LD pattern indicates a large e ective population size, suggesting the inflow
of exotic germplasm in the past. The genome-wide association study identified novel markers
significantly a ecting longevity, age at first calving and direct genetic e ects on calf weight.
These results provide the first evidence of the association of longevity with genes related with
DNA recognition and repair, and the association of age at first calving with aquaporin proteins,
which are known to have a crucial role in reproduction.info:eu-repo/semantics/publishedVersio
Mapping the Design Process for Urban Ecology Researchers
The integration of research into the design process is an opportunity to build ecologically informed urban design solutions. To date, designers have traditionally relied on environmental consultants to provide the best available science; however, serious gaps in our understanding of urban ecosystems remain. To evaluate ecosystem processes and services for sustainable urban design and to further advance our understanding of social-ecological processes within the urban context, we need to integrate primary research into the urban design process. In this article, we develop a road map for such a synthesis. Supporting our proposals by case studies, we identify strategic entry points at which urban ecology researchers can integrate their work into the design process
- …