517 research outputs found
Meson spectroscopy with antineutrons
No full textThe results on meson spectroscopy using antineutrons as projectiles are reported. Three-body (pi+pi+pi-) and five-body (pi+pi+pi+pi-pi-) final states following the annihilation of 100 to 290 MeV/c antineutrons on hydrogen were analyzed
A Search For Exotic T = 2 Or T = 3/2 Meson States At Lear
No full textWe discuss particular ( {Mathematical expression} p) two-body annihilation reactions as a tool to search for exotic meson resonances presumably described in terms of (2q {Mathematical expression}) configurations. These reactions may be studied within the comprehensive program of the OBELIX spectrometer at LEAR
Project of Thin Targets for the NUMEN Experiment
No full textAbstract
.
The goal of the NUMEN collaboration is
the measurement of
the cross sections
of
Double Charge Exchange reactions for several couple of ion projectile
-
target
, in order to provide
helpful data
to
study the nuclear matrix elements of the neutrino
-
le
ss
double β
-
decay. The need
of big statistics and high precision in the measurements require the use of high intensity beams
and very thin targets. This creates some problems to the design of the target frame and to the
dissipation of the heat generated by
the beam. The present paper reports
a possible
solution for
the cooling system and the production technique of
a tin target, together with the results of the
preliminary tests of heat dissipation
Antiproton stopping power at very low energies
No full textNew data about antiproton annihilations in gaseous targets at very low pressure (0.2 hPa), collected by the OBELIX apparatus at LEAR, show significant differences between H-2 and D-2; the right way to explain these differences seems to be through a nuclear stopping power, as confirmed by Monte Carlo simulations. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Botta, Elena/G-9742-2012; Villa, Mauro/C-9883-2009; Fontana, Andrea/I-4375-2012; Filippi, Alessandra/I-9530-201
Study of the isovector scalar mesons in the channel (p)over-bar-p->K(+/-)K-S(0)pi(-/+) at three hydrogen target densities
No full textThe study of the I = 1,0(++) states with the OBELIX detector in the channel --> (K+/-KS0) pi(-/+) at three different target densities is reported. We discuss in particular the results about a(0)(980) and the evidence of an extra scalar state with mass 1.29 +/- 0.01 GeV/c(2) and width 0.080 +/- 0.005 GeV/c(2). RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Botta, Elena/G-9742-2012; Fontana, Andrea/I-4375-2012; Filippi, Alessandra/I-9530-201
Study of phi pi pi final state in (p)over-bar-p annihilation at rest
No full textphi pi(+)pi(-) production in (p) over bar p annihilation at rest in liquid and gaseous hydrogen at low pressure (5 mbar) is studied in the OBELIX experiment at LEAR (CERN). It is found that this reaction is dominated by the annihilation from the (p) over bar p spin-triplet initial states. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Botta, Elena/G-9742-2012; Villa, Mauro/C-9883-2009; Fontana, Andrea/I-4375-2012; Filippi, Alessandra/I-9530-201
Mercati globali e marketing internazionale
No full textLa forte crescita degli scambi internazionali e degli investimenti esteri che si è manifestata negli ultimi due decenni ha dato vita a uno scenario profondamente diverso rispetto al passato, con assetti economici, dinamiche sociali e influenze culturali sempre più caratterizzate da connessioni e interdipendenze fra Paesi e aree geografiche. In questo quadro, le cui implicazioni ricadono entro il concetto, ormai ampiamente noto, di globalizzazione, potrebbe apparire superata la distinzione fra marketing per il contesto domestico e marketing internazionale. In realtà tale distinzione merita di essere conservata, non tanto a indicare differenze nei principi di base o nelle metodologie – che non cambiano – quanto per riconoscere, da una parte, le diverse condizioni in cui tali principi e metodologie trovano applicazione, dall’altra la maggiore incertezza e complessità che caratterizza il contesto di mercato, competitivo e ambientale di riferimento.
Il contenuto del capitolo è il seguente:
Lo sviluppo dei mercati internazionali e i fattori determinanti.
L'approccio globale ai mercati: le finalità del marketing internazionale.
Le spinte all'integrazione dei settori e dei mercati.
La ricerca delle opportunità di sviluppo: la macro e la
microsegmentazione della domanda.
La scelta dei segmenti di domanda: l'attrattività e l'accessibilità (barriere culturali, competitive
e artificiali).
Il posizionamento a livello internazionale (l'alternativa
contestualizzazione/standardizzazione).
Alleanze commerciali, mercati e accordi internazionali
Le strategie di entrata sui mercati esteri.
Le alleanze internazionali tra vantaggi e criticità
PHI AND OMEGA-MESON PRODUCTION IN (N)-OVER-BAR-P ANNIHILATION AND THE OZI RULE
No full textThe phipi+/omegapi+ ratio from npBAR annihilations on a liquid hydrogen target, for nBAR momenta between 64 and 297 MeV/c, was measured using the OBELIX spectrometer at LEAR. The ratio R(phipi/omegapi) = sigma(npBAR --> phipi+)/sigma(npBAR --> omegapi+) turned out 0.110 +/- 0.015(stat) +/- 0.006syst. Implications of this result on the OZI rule are discussed. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Botta, Elena/G-9742-2012; Villa, Mauro/C-9883-2009; Fontana, Andrea/I-4375-201
THE PHI-PI(+) OMEGA-PI(+) RATIO FROM (N)OVER-BAR-P ANNIHILATIONS
No full textA preliminary study of up three-prong annihilations into the channels K- K+ pi(+) and pi(-)pi(+)pi(+)pi(0) is presented for similar to 100-297 MeV/c () over bar n beam, the OZI rule is strongly violated. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Villa, Mauro/C-9883-2009; Filippi, Alessandra/I-9530-201
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