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Prospects for $K^+ \to \pi^+ \nu \bar{ \nu }$ at CERN in NA62
/ Newson, Francis (Birmingham U.) ; Aglieri Rinella, G. ; Aliberti, R. ; Ambrosino, F. ; Angelucci, B. ; Antonelli, A. ; Anzivino, G. ; Arcidiacono, R. ; Azhinenko, I. ; Balev, S. et al.
The NA62 experiment will begin taking data in 2015. [...]
arXiv:1411.0109.
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2014. - 8 p.
Preprint - Full text
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SEARCH FOR AN INVISIBLE VECTOR BOSON FROM $\pi^{0}$ DECAYS AT NA62
/ NA62 Collaboration
The high-intensity setup, trigger system flexibility and detector performance make the NA62 experiment at CERN particularly suitable to perform direct searches for long-lived hidden-sector particles, such as dark photons, dark scalars, axion-like particles, and heavy neutral leptons, using kaon and pion decays as well as operating the experiment in dump mode. Results from NA62 will be presented on a search for $π^0$ decays to one photon and an invisible massive dark photon. [...]
2019 - 6 p.
- Published in : (2019) , pp. 194-199
Fulltext: PDF;
In : International Conference on the Structure and the Interactions of the Photon, Frascati, Italy, 3 - 7 Jun 2019, pp.194-199
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Recent NA48/2 and NA62 results
/ Madigozhin, D. (Dubna, JINR) ; Ambrosino, F. ; Antonelli, A. ; Anzivino, G. ; Arcidiacono, R. ; Baldini, W. ; Balev, S. ; Batley, J.R. ; Behler, M. ; Bifani, S. et al.
The NA48/2 Collaboration at CERN has accumulated and analysed unprecedented statistics of rare kaon decays in the $K_{e4}$ modes: $K_{e4}(+-)$ ($K^\pm \to \pi^+ \pi^- e^\pm \nu$) and $K_{e4}(00)$ ($K^\pm \to \pi^0 \pi^0 e^\pm \nu$) with nearly one percent background contamination. It leads to the improved measurement of branching fractions and detailed form factor studies. [...]
arXiv:1408.0585.-
2014 - 4 p.
- Published in : (2014) , pp. 369-374
Fulltext: Pages_from_C14-03-22_369 - PDF; arXiv:1408.0585 - PDF; External link: Preprint
In : 49th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 22 - 29 Mar 2014, pp.369-374
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ZZ production in $e^{+}e^{-}$ interactions at $\sqrt{s}$ = 183 - 209 GeV
/ DELPHI Collaboration
Measurements of on-shell ZZ production are described, using data from the DELPHI experiment at LEP in e+e- collisions at centre-of-mass energies between 183 and 209 GeV, corresponding to an integrated luminosity of about 665 pb^{-1}. Results obtained in each of the final states q anti-q q anti-q, nu anti-nu q anti-q, mu+ mu- q anti-q, e+ e- q anti-q, tau+ tau- q anti-q, l+ l- l+ l-, and nu anti-nu l+ l- (with l=e,mu) are presented. [...]
hep-ex/0307050; CERN-EP-2003-009; CERN-EP-2003-009.-
Geneva : CERN, 2003 - 35 p.
- Published in : Eur. Phys. J. C 30 (2003) 447-466
Fulltext: 0307050 - PDF; arXiv:hep-ex_0307050 - PDF; External link: Preprint
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Study of Triple-Gauge-Boson Couplings ZZZ, ZZ$\gamma$ and Z$\gamma\gamma$ at LEP
/ DELPHI Collaboration
Neutral triple-gauge-boson couplings ZZZ, ZZgam and Zgamgam have been studied with the DELPHI detector using data at energies between 183 and 208 GeV. Limits are derived on these couplings from an analysis of the reactions e+e- -> Zgam, using data from the final states gamma f fbar, with f = q or neutrino, from e+e- -> ZZ, using data from the four-fermion final states q qbar q qbar, q qbar mu+ mu-, q qbar e+ e-, q qbar nu nubar, mu+ mu- nu nubar and e+ e- nu nubar, and from e+e- -> Zgam*, in which the final state gamma is off mass-shell, using data from the four-fermion final states q qbar e+ e- and q qbar mu+ mu-. [...]
arXiv:0706.2741; HEP-PH-EP-2006-008; CERN-PH-EP-2006-008.-
Geneva : CERN, 2007 - 29 p.
- Published in : Eur. Phys. J. C 51 (2007) 525-542
Fulltext: PDF; External link: Fulltext
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Precision Measurement of the Ratio of the Charged Kaon Leptonic Decay Rates
/ Lazzeroni, C. (Birmingham U.) ; Romano, A. (Birmingham U.) ; Ceccucci, A. (CERN) ; Danielsson, H. (CERN) ; Falaleev, V. (CERN) ; Gatignon, L. (CERN) ; Goy Lopez, S. (CERN ; Madrid, CIEMAT) ; Hallgren, B. (CERN ; Birmingham U.) ; Maier, A. (CERN) ; Peters, A. (CERN) et al.
A precision measurement of the ratio $R_K$ of the rates of kaon leptonic decays $K^\pm \to e^\pm\nu$ and $K^\pm \to \mu^\pm \nu$ with the full data sample collected by the NA62 experiment at CERN in $2007-2008$ is reported. The result, obtained by analysing $\sim\!150000$ reconstructed $K^\pm \to e^\pm \nu$ candidates with $11\%$ background contamination, is $R_K = (2.488\pm0.010)\times10^{-5}$, in agreement with the Standard Model expectation..
arXiv:1212.4012; CERN-PH-EP-2012-367; CERN-PH-EP-2012-367.-
Geneva : CERN, 2013-02-26 - 18 p.
- Published in : Phys. Lett. B 719 (2013) 326-336
Draft (restricted): PDF; Fulltext: authors list - TEX; arXiv:1212.4012 - PDF; CERN-PH-EP-2012-367 - PDF;
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$Z\gamma*$ production in $e^+ e^-$ interactions at $\sqrt{s}$ = 183 - 209 GeV
/ DELPHI Collaboration
Measurements of Zgamma* production are presented using data collected by the DELPHI detector at centre-of-mass energies ranging from 183 to 209 GeV, corresponding to an integrated luminosity of about 667 pb^{-1}. The measurements cover a wide range of the possible final state four-fermion configurations: hadronic and leptonic (e+ e- q qbar, mu+ mu- q qbar, q qbar nu nubar), fully leptonic (l+ l- l'+ l'-) and fully hadronic final states (q qbar q qbar, with a low mass q qbar pair). [...]
arXiv:0706.2565; CERN-PH-EP-2006-022; CERN-PH-EP-2006-022.-
2007 - 38 p.
- Published in : Eur. Phys. J. C 51 (2007) 503-523
Fulltext: PDF; External link: Preprint
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A Measurement of the Tau Topological Branching Ratios
/ DELPHI Collaboration
Using data collected in the DELPHI detector at LEP-1, measurements of the inclusive tau branching ratios for decay modes containing one, three, or five charged particles have been performed, giving the following results: B_1 = B(\tau^- -> (particle)^- \geq 0pi^0 \geq 0K^0 \nu_\tau(\bar{\nu})) = (85.316 +/- 0.093 +/- 0.049)%; B_3 = B(\tau^- -> 2h^-h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (14.569 +/- 0.093 +/- 0.048)%; B_5 = B(\tau^- -> 3h^-2h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (0.115 +/- 0.013 +/- 0.006)%, where h is either a charged pi or K meson. The first quoted uncertainties are statistical and the second systematic..
hep-ex/0105047; CERN-EP-2001-030; CERN-DELPHI-2001-091-CONF-519; CERN-EP-2001-030; DELPHI-2001-091-CONF-519.-
Geneva : CERN, 2001 - 32 p.
- Published in : Eur. Phys. J. C 20 (2001) 617-637
Fulltext: 0105047 - PDF; arXiv:hep-ex_0105047 - PDF; External link: Preprint
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