53 research outputs found
Search for the doubly heavy baryon decaying to
A first search for the
decay is performed by the LHCb experiment with a data sample of proton-proton
collisions, corresponding to an integrated luminosity of
recorded at centre-of-mass energies of 7, 8, and . Two peaking structures are seen with a local (global) significance of
and standard deviations at masses of
and , respectively. Upper limits are set on the baryon
production cross-section times the branching fraction relative to that of the
decay at centre-of-mass energies of 8 and
, in the and in the
rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to
, respectively. Upper limits are presented
as a function of the mass and lifetime.Comment: All figures and tables, along with machine-readable versions and any
supplementary material and additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-005.html (LHCb
public pages
Study of the lineshape of the chi(c1) (3872) state
A study of the lineshape of the chi(c1) (3872) state is made using a data sample corresponding to an integrated luminosity of 3 fb(-1) collected in pp collisions at center-of-mass energies of 7 and 8 TeV with the LHCb detector. Candidate chi(c1)(3872) and psi(2S) mesons from b-hadron decays are selected in the J/psi pi(+)pi(-) decay mode. Describing the lineshape with a Breit-Wigner function, the mass splitting between the chi(c1 )(3872) and psi(2S) states, Delta m, and the width of the chi(c1 )(3872) state, Gamma(Bw), are determined to be (Delta m=185.598 +/- 0.067 +/- 0.068 Mev,)(Gamma BW=1.39 +/- 0.24 +/- 0.10 Mev,) where the first uncertainty is statistical and the second systematic. Using a Flatte-inspired model, the mode and full width at half maximum of the lineshape are determined to be (mode=3871.69+0.00+0.05 MeV.)(FWHM=0.22-0.04+0.13+0.07+0.11-0.06-0.13 MeV, ) An investigation of the analytic structure of the Flatte amplitude reveals a pole structure, which is compatible with a quasibound D-0(D) over bar*(0) state but a quasivirtual state is still allowed at the level of 2 standard deviations
Measurement of the CKM angle in and decays with
A measurement of -violating observables is performed using the decays
and , where the meson is
reconstructed in one of the self-conjugate three-body final states and (commonly denoted ). The decays are analysed in bins of the -decay phase space, leading
to a measurement that is independent of the modelling of the -decay
amplitude. The observables are interpreted in terms of the CKM angle .
Using a data sample corresponding to an integrated luminosity of
collected in proton-proton collisions at centre-of-mass
energies of , , and with the LHCb experiment,
is measured to be . The hadronic
parameters , , , and ,
which are the ratios and strong-phase differences of the suppressed and
favoured decays, are also reported
Measurement of CP asymmetries and branching fraction ratios of Bâ decays to two charm mesons
The asymmetries of seven decays to two charm mesons are measured using data corresponding to an integrated luminosity of of proton-proton collisions collected by the LHCb experiment. Decays involving a or meson are analysed by reconstructing only the or decay products. This paper presents the first measurement of and , and the most precise measurement of the other five asymmetries. There is no evidence of violation in any of the analysed decays. Additionally, two ratios between branching fractions of selected decays are measured.The CP asymmetries of seven B decays to two charm mesons are measured using data corresponding to an integrated luminosity of 9 fb of proton-proton collisions collected by the LHCb experiment. Decays involving a D or meson are analysed by reconstructing only the D or decay products. This paper presents the first measurement of (BâD) and (BâD), and the most precise measurement of the other five CP asymmetries. There is no evidence of CP violation in any of the analysed decays. Additionally, two ratios between branching fractions of selected decays are measured.[graphic not available: see fulltext]The asymmetries of seven decays to two charm mesons are measured using data corresponding to an integrated luminosity of of proton-proton collisions collected by the LHCb experiment. Decays involving a or meson are analysed by reconstructing only the or decay products. This paper presents the first measurement of and , and the most precise measurement of the other five asymmetries. There is no evidence of violation in any of the analysed decays. Additionally, two ratios between branching fractions of selected decays are measured
Sex differences in the outcome of juvenile social isolation on HPA axis function in rats
Women are more likely than men to suffer from anxiety disorders and major depression. These disorders share hyperresponsiveness to stress as an etiological factor. Thus, sex differences in brain arousal systems and their regulation by chronic stress may account for the increased vulnerability to these disorders in women. Social isolation is a model of early life stress that results in neurobiological alterations leading to increased anxiety-like and depressive-like behaviors. Here we investigated the sex difference in the effects of post-weaning social isolation on acute stress sensitivity and behavior in rats. In both sexes, social isolation at weaning reduced basal levels of the neuroactive steroid allopregnanolone in the brain and of corticosterone in plasma. Moreover, acute stress increased plasma corticosterone levels in both group-housed and socially isolated male and female rats; however this effect was greater in male than female rats subjected to social isolation. Intriguingly, group-housed female rats showed no change in plasma and brain levels of allopregnanolone after acute foot-shock stress. The absence of stress-induced effects on allopregnanolone synthesis might be due to the physiologically higher levels of this hormone in females vs. males. Accordingly, increasing allopregnanolone levels in male rats blunted the response to foot-shock stress in these animals. Socially isolated male, but not female, rats also display depressive-like behavior and increased hippocampal brain-derived neurotrophic factor (BDNF). The ovarian steroids could âbufferâ the effect of this adverse experience in females on these parameters. Finally, the dexamethasone (DEX) suppression test indicated that the chronic stress associated with social isolation impairs feedback inhibition in both sexes in which an increase in the abundance of glucocorticoid receptors (GRs) in the hippocampus was found. Altogether, these results demonstrate that social isolation affects neuroendocrine reactivity to stress, plasticity and emotionality in a sexually dimorphic manner
Operational evaluation of the Mediterranean Monitoring and Forecasting Centre products: Implementation and Results
A web-based validation platform has been developed at the Istituto Nazionale di Geofisica e Vulcanologia (INGV) for the Near Real Time validation of the MyOcean-Mediterranean Monitoring and Forecasting Centre products (Med-MFC).
A network for the collection of the in-situ observations, the nested sub-basin forecasting systems model data (provided by the partners of the Mediterranean Operational Oceanography Network, MOON) and the Sea Surface Temperature (SST) satellite data has been developed and is updated every day with the new available data. The network collects temperature, salinity, currents and sea level data. The validation of the biogeochemical forecast products is done by use of ocean colour satellite data produced for the Mediterranean Sea.
All the data are organized in an ad hoc database interfaced with a dedicated software which allows interactive visualizations and statistics (CalVal SW). This tool allows to evaluate NRT products by comparison with independent observations for the first time.
The heterogeneous distribution and the scarcity of moored observations reflect with large areas uncovered with measurements. Nevertheless, the evaluation of the forecast at the locations of observations could be very useful to discover sub-regions where the model performances can be improved, thus yielding an important complement to the basin-mean statistics regularly calculated for the Mediterranean MFC products using semi-independent observations
Habitat III - Italyâs National Report
La Conferenza internazionale Habitat III, organizzata da Un-Habitat, lâAgenzia delle Nazioni Unite sugli Insediamenti Umani, si svolgerĂ a Quito (Ecuador) nellâottobre 2016 ed Ăš dedicata al tema dello sviluppo urbano sostenibile.
Lâevento intende porre al centro del dibattito le questioni urbane intese nella loro complessitĂ e varietĂ , con lâobiettivo di rafforzare lâimpegno mondiale sul tema dellâurbanizzazione sostenibile e dellâattuazione della âNuova Agenda Urbanaâ, costruita sullâAgenda Habitat adottata ad Istanbul nel 1996.
I paesi partecipanti sono chiamati a redigere un Rapporto nazionale sulle politiche urbane, sia in attuazione degli impegni assunti nella precedente Conferenza Habitat II del 1996, sia in relazione ai temi connessi agli insediamenti urbani in ambito nazionale.
Sulla base dellâesperienza della II Conferenza di Istanbul del 1996, nel novembre 2015 il Dipartimento per le Politiche di Coesione della Presidenza del Consiglio dei Ministri, dâintesa con il Dipartimento per la Programmazione e il Coordinamento della Politica Economica, ha assunto il coordinamento delle attivitĂ per la partecipazione italiana alla Conferenza e la predisposizione del rapporto nazionale. Il Rapporto descrive le peculiaritĂ della situazione italiana, caratterizzata da un policentrismo che, se un lato si fonda su grandi agglomerati urbani (le cittĂ metropolitane), dallâaltro presenta una specifica vivacitĂ nelle cittĂ di media dimensione che costituiscono poli rilevanti di offerta di servizi e sulla presenza di un numero elevato di piĂč piccole realtĂ . Il Rapporto vuole offrire un contributo di conoscenze, di esperienze e di proposte che, ancorchĂ© parziali, potranno costituire un supporto per le scelte strategiche che si potranno intraprendere successivamente. Lâattenzione per le cittĂ Ăš cresciuta, trovando motivazione e sostegno nelle politiche europee e nelle politiche nazionali, attraverso la programmazione 2014-2020 dei fondi strutturali comunitari e lâimpiego delle risorse ordinarie e di coesione di origine nazionale.
Questo Rapporto puĂČ rappresentare unâopportunitĂ per una riflessione sui processi economici e sociali in atto nelle nostre cittĂ , per la promozione di politiche di gestione e riuso del patrimonio edilizio, per alimentare la discussione in merito alle sfide della pianificazione e gestione degli spazi urbani, nel riconoscimento alle cittĂ del loro ruolo strategico di motore dello sviluppo.Habitat III, the international Conference organised by UN-Habitat (UN Agency for Human Settlements) will be held in Quito (Ecuador) in October 2016, dedicated to the theme of Housing and Sustainable Urban Development.
The event aims to focus the debate on urban issues perceived in their complexity and variety, with the aim to strengthen global commitment on sustainable urbanisation and implementation of the "New Urban Agenda", built upon the Habitat Agenda adopted in Istanbul in 1996.
Participating Countries are required to develop a national report on urban policies, both in implementing the commitments undertaken within the previous Habitat II Conference of 1996, and in relation to issues connected to urbanisation nationwide. The Report describes the peculiarities of Italyâs situation and dimensions, characterised by a polycentric structure based both on large conurbations (metropolitan cities) and specifically vibrant medium-sized cities endowed with remarkable services supply systems, and on the presence of a high number of smaller realities.
The Report aims to contribute knowledge, experiences and proposals which, although partial, will be a support to the strategic choices that may be undertaken subsequently.This Report may provide an opportunity to reflect on the economic and social process taking place within our cities, for promotion of management policies and reuse of building stock in order to feed the debate on the challenges related to planning and management of urban spaces, and acknowledging citiesâ strategic role as development driver
ECMM-FIMUA survey on invasive fungal infections in intensive care units : ad interim analysis after 12 months
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