Measurement of the very rare K+→π+ννˉK^+ \to \pi^+ \nu \bar\nu decay

The decay K+→π+νν¯ , with a very precisely predicted branching ratio of less than 10−10 , is among the best processes to reveal indirect effects of new physics. The NA62 experiment at CERN SPS is designed to study the K+→π+νν¯ decay and to measure its branching ratio using a decay-in-flight technique. NA62 took data in 2016, 2017 and 2018, reaching the sensitivity of the Standard Model for the K+→π+νν¯ decay by the analysis of the 2016 and 2017 data, and providing the most precise measurement of the branching ratio to date by the analysis of the 2018 data. This measurement is also used to set limits on BR(K+→π+X ), where X is a scalar or pseudo-scalar particle. The final result of the BR(K+→π+νν¯ ) measurement and its interpretation in terms of the K+→π+X decay from the analysis of the full 2016-2018 data set is presented, and future plans and prospects are reviewed

VPI-Venice Platform for Innovation and Technology Transfer presenta TRExDUE+UNO=SETTE PROGETTI DI (EXTRA)ORDINARIA INNOVAZIONE

Introducono Salvatore Basile, partner Cortellazzo&Soatto Ercole Bonini, fondatore Studio Bonini Mikael Troberg, direttore dei settori Ricerca e sviluppo e Test e performance di Wärtsilä Italia Giuseppe Morandini, presidente di Cassa di Risparmio Friulia Venezia Giulia Presentano i progetti di innovazione Gabriele Bedon, ricercatore Leaf Project Group Andrea Demozzi, fondatore Irislab Luca Fiori, ricercatore Green Process Engineering, Università di Trento Michele Gubert, business development manager SOFC Power Ermanno Imbergamo, ricercatore a termine, Università di Perugia Massimiliano Occhiali, managing director Akkutrack Alberto Tessarolo, ricercatore Dipartimento di Ingegneria e Architettura, Università di Trieste Conduce Massimo Russo, direttore Wired Italia A seguire TRAFERIMENTO TECNOLOGICO: COME FAR INCONTRARE RICERCA E IMPRESA Dibattito con Diego Bravar, presidente e amministratore delegato TBS Group Maurizio Fermeglia, rettore Università di Trieste Roberto Zuccato, presidente Confindustria Veneto Concludono Paolo Gubitta, docente di Organizzazione aziendale Università di Padova, direttore Area Imprenditorialità, Fondazione CUOA Francesco Venier, direttore Executive MBA, MIB School of Management Trieste Modera Paolo Possamai, direttore Il Piccolo Quali sono gli ingredienti che permettono a un’idea originale di trasformarsi in un progetto di successo e di trovare uno sbocco sul mercato? E’ questa la domanda cui tenteranno di rispondere i sei protagonisti dell'evento, iniziativa speciale di Trieste Next curata da VPI-Venice Platform for Innovation and Technology Transfer, progetto promosso da Fondazione Cuoa, MIB-School of Management, Studio Bonini, Studio Cortellazzo&Soatto, VeneziePost, con la collaborazione degli uffici di trasferimento tecnologico delle Università delle Venezie, con l’obiettivo di favorire l’incontro tra ricercatori e innovatori impegnati nello sviluppo di progetti e di soluzioni avanzate e imprenditori, manager e professionisti interessati a incrementare il contenuto di innovazione (tecnologica, funzionale, estetica, etc.) nei prodotti e servizi di imprese, enti e istituzioni

Construction and test of a RICH prototype for the NA62 experiment

A RICH prototype has been constructed and tested. The detector was cylindrical, 17 m long and 60 cm diameter, filled with neon gas at atmospheric pressure. A spherical mirror with 17 m focal length was used and 96 photomultipliers were placed in the mirror focal plane. The prototype was exposed to a 200 GeV/c momentum negative beam derived from the CERN SPS in the 2007 fall. The performances of the detector in terms of Cherenkov angle resolution, number of photoelectrons and time resolution are presented

Measurement of the polarization of the Xi0 (anti-Xi0) hyperon beam by the NA48/1 experiment

A total of 368415 Xi(0) --> Lambda Xi(0) and 31 171 (Xi(0)) over bar --> (Lambda) over bar pi(0) were selected from data recorded in the NA48/1 experiment during 2002 data taking. From this sample, the polarization of Xi(0) and (Xi(0)) over bar hyperons was measured to be P(Xi 0) = -0.102 +/- 0.012(stat) +/- 0.008(syst) and P((Xi 0) over bar) = -0.01 +/- 0.04(stat) 0.008(syst). The dependence of P(Xi 0) on the Xi(0) transverse momentum with respect to the primary proton beam is also presented. With the same data sample. the ratio of (Xi(0)) over bar and Xi(0) fluxes in proton collisions at 400 GeV/c oil a beryllium target was measure

Search for heavy neutrinos in K+→μ+νμK^+ \rightarrow \mu^+ \nu_{\mu} decays

International audienceThe NA62 experiment recorded a large sample of K+→μ+νμ decays in 2007. A peak search has been performed in the reconstructed missing mass spectrum. In the absence of a signal, limits in the range 2×10−6 to 10−5 have been set on the squared mixing matrix element |Uμ4|2 between muon and heavy neutrino states, for heavy neutrino masses in the range 300–375 MeV/ c2 . The result extends the range of masses for which upper limits have been set on the value of |Uμ4|2 in previous production search experiments

Determination of the relative decay rate KS -> πeν / KL -> πeν

The decay rate of K-S -> pi ev relative to the rate of K-L -> pi rev has been measured by the NA48 Collaboration in a neutral kaon beam originating from 400 GeV proton-Be interactions at the CERN SPS. The result is 0.993 +/- 0.026(stat) +/- 0.022(syst), compatible with I in agreement with the Standard Model prediction at tree level. It implies B R (K-S -> pi ev) = (7.05 +/- 0.18(stat) +/- 0.16(syst)) X 10(-4)

New high statistics measurement of K-e4 decay form factors and pi pi scattering phase shifts

We report results from a new measurement of the K-e4 decay K-+/- -> pi(+)pi(-)e(+/-)nu by the NA48/2 collaboration at the CERN SPS, based on a partial sample of more than 670 000 K-e4 decays in both charged modes collected in 2003. The form factors of the hadronic current (F,G,H) and pi pi phase difference (delta=delta(s)-delta(p)) have been measured in ten independent bins of the pi pi mass spectrum to investigate their variation. A sizeable acceptance at large pi pi mass, a low background and a very good resolution contribute to an improved experimental accuracy, a factor two better than in the previous measurement, when extracting the pi pi scattering lengths a(0) (0) and a(0) (2). Under the assumption of isospin symmetry and using numerical solutions of the Roy equations, the following values are obtained in the plane (a(0) (0),a(0) (2)): a(0) (0)=0.233 +/- 0.016(stat)+/- 0.007(syst),a(0) (2)=-0.0471 +/- 0.011(stat)+/- 0.004syst. The presence of potentially large isospin effects is also considered and will allow comparison with precise predictions from Chiral Perturbation Theory