Production measurements at LHCb with the first data

We report on the perspective measurements of inclusive particle production in high-energy p-p collisions with data to be collected by the LHCb experiment at CERN's LHC. These include V0 and D meson production studies, which can be based on a minimum bias sample, as well as charmonia production studies, which need a muon-triggered samples. Using reconstructed $J/\psi \to \mu^+ \mu^-$ decays, both the prompt $J/\psi$ and $b\to J/\psi$ production cross-sections will be determined, in the forward pseudo-rapidity range of 2-5 covered by LHCb. Due to the large production rate, such analyses will be possible with very small integrated luminosities of the order of a few $\mathrm{pb}^{-1}$. Other charmonia related measurements will also be discussed, such as that of the $J/\psi$ polarization at production or of the production of some of the new X, Y and Z states.Comment: To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C09072

Evidence for the rare decay Σ+→pμ+μ−\Sigma^+ \to p \mu^+ \mu^- at LHCb

A search for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of $3 fb^{-1}$. An excess of events is observed with respect to the background expectations with a signal significance of 4.0 standard deviations. No significant structure is observed in the dimuon invariant mass distribution.Comment: To appear in the Proceedings of the KAON2016 Conferenc

Rare charm decays: an experimental review

Indirect searches, and in particular rare decays, have proven to be a fruitful field to search for New Physics beyond the Standard Model. While the down-quark sector (B and K) have been studied in detail, less attention was devoted to charm decays due to the smaller expected values and higher theoretical uncertainties of their observables. Recently a renewed interest is growing in rare charm searches. In this article we review the current experimental status of searches for rare decays in charmed hadrons. While the Standard Model rates are yet to be reached, current experimental limits are already putting constraints on New Physics models.Comment: 21 pages, 13 figures, to appear in the proceedings of The 5th International Workshop on Charm Physics (Charm 2012

Forty-four years of land use changes in a Sardinian cork oak agro-silvopastoral system: a qualitative analysis

The island of Sardinia is the biggest producer of natural cork in Italy. In this study, cork oak cover change is investigated in a typical agro-silvopastoral system where the main activities are cereal fodder and wheat cultivation, sheep rearing and cork exploitation. The research method is based on the comparison of two land use maps produced by photo-interpretation of digitised aerial photographs taken in 1954 and 1998, combined with interviews with local farmers, field surveys, and data collected from literature, administrative documentation and decadal censuses (at council level). The results show that the cork oak woodland surface decreased (-29%). It was substituted by other forest, ploughed land, and mixed grassland and shrubland. Apart from the transformation of the cork oak woodland to other forest, other changes have happened probably because of an increase in agricultural and pastoral activities as described by the documental material available for the same area

First observations on the saline content of tbe precipitations in some stations in Sardinia (Italy)

The analysis of the saline contents of the precipitations in some stations in Sardinia are given. The waters samples were collected monthly in nine stations for a year. The analysis revealed that all the ions studied have rather high average values and that they vary considerably both in space and time. The values were also noted to decrease from west to east in correlation with the predominating winds on the island (Fig. 3). The average concentration of Cl and SO4 was very high (180 and 71 kg/ha respectively)

Su Call. fr. 22 Pf. (24 Mass.)

Analisi del pentametro nelle sue componenti lessicali allo scopo di mostrare la capacità di Callimaco di muoversi su diversi registri di stil

Effetti dell'acido gibberellico su alcune modificazioni istologiche dell'epicarpo dei frutti di « Washington navel», « Tarocco», e Clementine « Comune »

Some experiences on « Tarocco» and « Washington Navel » sweet oranges and clementine mandarin concerning the effects of gibberellic acid on fruit rind senescence are here reported. The following treatments were compared: I - one treatment at start of fruit colouring; 2 - one treatment about 40 days later; 3 - one treatment about 80 days later; 4 - two treatment; at start of fruit colouring and 40 days later; 5 - two treatments: at start of fruit colouring and 80 days later; 6 - control. All the treatments were made with 1O p.p.m. of gibberellic acido Rind samples were made from fruits collected at two different period of harvest season: as untreated fruits were ripen and two months later. Histological observations were made on cell size of flavedo and middle albedo and intercellular spaces percentage of inner albedo were evaluted. Results showed no effect of gibberellic acid on clementine mandarin, probably because of typical rind structure of this species, in wich no compact tissues can be observed once during first ripening phases. In «Tarocco» and « Washington Navel» on the contrary, gibberellic acid proved to be effective in reducing rind senescence; infact rind tissues of treated fruits appeared more compact, with smaller celles, and minor intercellular spaces in inner albedo, also in fruits collected two months later. More effective treatments resulted those made at the start of fruit colouring

Prime considerazioni sul chimismo e sul termalismo delle acque minerali della Sardegna settentrionale

Nel presente articolo vengono riportati i risultati di uno studio idrogeologico e idrogeochimico relativo all'area del nord Sardegna

Nuove osservazioni sul chimismo e sul termalismo delle acque minerali della Sardegna settentrionale

La presente nota è basata sulla ulteriore elaborazione dei dati chimici ed isotopici delle acque profonde della Sardegna settentrionale. Nel rapporto vengono presi in considerazione 21 punti d'acqua che vengono divisi in gruppi: uno di questi, il 3b, è costituito dalle acque oligominerali clorurato-bicarbonato-alcaline; ne fanno parte le sorgenti 21 Scala, 42 Lu Bulioni, 62 La Madonnina, 64 S. Antioco e 73 S. Leonardo

Trag. adesp. *120c K.-Sn. (βαγάταν)

Ipotesi su formazione e semantica di βαγάταν