78 research outputs found
Puzzles in charm spectroscopy
We briefly analyze aspects of open and hidden charm resonances, discussing in
particular the mesons and X(3872).Comment: 8 pages, 4 figures. Invited talk given at the YKIS Seminar on New
Frontiers in QCD: Exotic Hadrons and Hadronic Matter, Kyoto, Japan, 20 Nov. -
8 Dec. 200
FCNC and transitions: Standard Model versus a single Universal Extra Dimension scenario
We study the FCNC and transitions in the Standard Model and in
a scenario with a single Universal Extra Dimension. In particular, we focus on
the present knowledge of the hadronic uncertainties and on possible
improvements. We discuss how the measurements of these modes can be used to
constrain the new parameter involved in the extra dimensional scenario, the
radius of the extra dimension, completing the information available from
B-factories. The rates of these induced decays are within the reach
of new experiments, such as LHCb.Comment: LaTex, 8 pages, 7 eps figures. Version to be published in Physical
Review
Premiers enseignements des effets du froid de janvier 1985 sur les espèces forestières étudiées en arboretums et en plantations comparatives de provenances en région méditerranéenne française
Les dégâts de gel dus au froid exceptionnel de janvier 1985 ont été observés sur les essais de sélection d'espèces et de provenance installés dans les 20 dernières années en zone méditerranéenne
Bounding effective parameters in the chiral Lagrangian for excited heavy mesons
We use recent experimental data on charmed mesons to constrain three coupling
constants in the effective lagrangian describing the interactions of excited
heavy-light mesons with light pseudoscalar mesons at order .
Predictions in the beauty sector are also derived.Comment: LaTex, 11 pages, 1 eps figur
Model independent analysis of a class of decay modes
The widths of a class of two-body decays induced by and transitions are determined in a
model-independent way, using symmetry and existing information on
and decays, with and a
light pseudoscalar or vector meson. The results are relevant for the
physics programmes at the hadron colliders and at the factories
running at the peak of .Comment: LaTeX, 10 pages, 3 figures. Results for B_s \to D \eta(') in Table 1
correcte
Excited Charmed Mesons: Observations, Analyses and Puzzles
We review the status of recently observed positive parity charmed resonances,
both in the non-strange and in the strange sector. We describe the experimental
findings, the main theoretical analyses and the open problems deserving further
investigations.Comment: LaTeX, 25 pages, 5 figures. Invited revie
Recommendations for pre-symptomatic genetic testing for hereditary transthyretin amyloidosis in the era of effective therapy: a multicenter Italian consensus
Hereditary transthyretin amyloidosis (ATTRv, v for variant) is a late-onset, autosomal dominant disease caused by progressive extracellular deposition of transthyretin amyloid fibrils, leading to organ damage and death. For other late-onset fatal diseases, as Huntington's disease, protocols for pre-symptomatic genetic testing (PST) are available since decades. For ATTRv, limited experience has been reported to date, mostly gathered before the availability of approved therapies. We aimed at developing recommendations for a safe and feasible PST protocol in ATTRv in the era of emerging treatments, taking also into account Italian patients' characteristics and healthcare system rules. After an initial survey on ongoing approaches to PST for ATTRv in Italy, two roundtable meetings were attended by 24 experts from 16 Italian centers involved in the diagnosis and care of this disease. Minimal requirements for PST offer and potential critical issues were highlighted. By November 2019, 457 families affected by ATTRv with 209 molecularly confirmed pre-symptomatic carriers were counted. The median age at PST was 41.3years of age, regardless of the specific mutation. Half of the Italian centers had a multidisciplinary team, including a neurologist, an internist, a cardiologist, a medical geneticist and a psychologist, although in most cases not all the specialists were available in the same center. A variable number of visits was performed at each site. Experts agreed that PST should be offered only in the context of genetic counselling to at risk individuals aged 18 or older. Advertised commercial options for DNA testing should be avoided. The protocol should consist of several steps, including a preliminary clinical examination, a pre-test information session, an interval time, the genetic test and a post-test session with the disclosure of the test results, in the context of an experienced multidisciplinary team. Recommendations for best timing were also defined. Protocols for PST in the context of ATTRv can be refined to offer at risk individuals the best chance for early diagnosis and timely treatment start, while respecting autonomous decisions and promoting safe psychological adjustment to the genetic result
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