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1.
First observation and study of the K±π0π0μ±ν decay / NA48/2 Collaboration
The NA48/2 experiment at CERN reports the first observation of the K±π0π0μ±ν decay based on a sample of 2437 candidates with 15% background contamination collected in 2003-2004. The decay branching ratio in the kinematic region of the squared dilepton mass above 0.03~GeV2/c4 is measured to be (0.65±0.03)×106. [...]
arXiv:2310.20295; CERN-EP-2023-245.- Geneva : CERN, 2024-03-22 - 16 p. - Published in : JHEP 2403 (2024) 137 Draft (restricted): PDF; Fulltext: 2310.20295 - PDF; CERN-EP-2023-245 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
2.
Latest results on rare kaon decays from the NA48/2 experiment @CERN / NA48/2 Collaboration
The NA48/2 experiment at CERN reports the first observation of the K±π±π0e+e decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. [...]
2020 - 9 p. - Published in : Int. J. Mod. Phys. A 35 (2020) 2044019
In : 8th International Conference on New Frontiers in Physics (ICNFP 2019), Kolymbari, Crete, Greece, 21 - 29 Aug 2019, pp.2044019
3.
Latest results on rare kaon decays from the NA48/2 experiment at CERN / NA48/2 Collaboration
The NA48/2 experiment at CERN reports the first observation of the K->pi0e+e-decay from an exposure of 1.7x10^11 charged kaon decays recorded in 2003-2004. A sample of 4919candidates with 4.9% background contamination allows the determination of the branching ratioin the full kinematic region. [...]
SISSA, 2021 - 6 p. - Published in : PoS ICHEP2020 (2021) 413 Fulltext: PDF;
In : 40th International Conference on High Energy Physics (ICHEP), Prague, Czech Republic, 28 Jul - 6 Aug 2020, pp.413
4.
Precision measurement of the form factors of semileptonic charged kaon decays from NA48/2 / NA48/2 Collaboration
We present a measurement of the charged kaon semileptonic form factors based on 4.3 million K±π0e±νe and 2.9 million K±π0μ±νμ decays collectedby the NA48/2 experiment. The single results for the semi-electronic and semi-muonic channel have better and similar precision, respectively, than previousmeasurements. [...]
2018 - 4 p. - Published in : (2018) , pp. 315-318
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.315-318
5.
First observation and study of the K±π±π0e+e decay / NA48/2 Collaboration
The NA48/2 experiment at CERN reports the first observation of the K±π±π0e+e decay from an exposure of 1.7×1011 charged kaon decays recorded in 20032004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR(K±π±π0e+e)=(4.24±0.14)×106. [...]
arXiv:1809.02873; CERN-EP-2018-246.- Geneva : CERN, 2019-01-10 - 10 p. - Published in : Phys. Lett. B 788 (2019) 552-561 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2018-246 - PDF; 1809.02873 - PDF;
6.
Measurement of the form factors of charged kaon semileptonic decays / NA48/2 Collaboration
A measurement of the form factors of charged kaon semileptonic decays is presented, based on 4.4×106 K±π0e±νe (K±e3) and 2.3×106 K±π0μ±νμ (K±μ3) decays collected in 2004 by the NA48/2 experiment. The results are obtained with improved precision as compared to earlier measurements. [...]
arXiv:1808.09041; CERN-EP-2018-231.- Geneva : CERN, 2018-10-24 - 20 p. - Published in : JHEP 10 (2018) 150 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Draft (restricted): PDF; Fulltext: fermilab-pub-18-701 - PDF; CERN-EP-2018-231 - PDF; 1808.09041 - PDF;
7.
Model independent measurement of the leptonic kaon decay K±μ±νμe+e with the NA48/2 experiment / Marchevski, Radoslav (Mainz U.) ; Arcidiacono, R ; Baldini, W ; Balev, S ; Batley, J R ; Behler, M ; Bifani, S ; Biino, C ; Bizzeti, A ; Bloch-Devaux, B et al. /NA48/2
A measurement of the branching ratio of the rare leptonic kaon decay K ± → μ ± ν μ e + e − is pre- sented using data collected by the NA48/2 experiment in 2003 and 2004. The measurement is performed in the region M ee > 140 MeV/c 2 [...]
SISSA, 2016 - 6 p. - Published in : PoS ICHEP2016 (2016) 636 Fulltext: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.636
8.
First observation and study of K±π±π0e+e decay at the NA48/2 experiment / Misheva, M H (Dubna, JINR) ; Anzivino, G ; Arcidiacono, R ; Balev, S ; Batley, J R ; Behler, M ; Bi­fani, S ; Biino, C ; Bizzeti, A ; Bloch-Devaux, B et al.
A sample of almost 2000 K±π±π0e+e rare decays with a background contamination below 3% is observed for the first time by the NA48/2 experiment at CERN/SPS. The preliminary branching ratio in the full kinematic region is obtained to be BR(K±π±π0e+e) = (4.06 ± 0.17) x 106 by analyzing the data set recorded in 3-month NA48/2 run during 2003. [...]
2015 - 4 p. - Published in : , pp. 237-240 Fulltext: PDF;
In : 50th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 21 - 28 Mar 2015, pp.237-240
9.
Searches for lepton number violation and resonances in K±πμμ decays / NA48/2 Collaboration
The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003--2004. A new upper limit on the rate of the lepton number violating decay K±πμ±μ± is reported: B(K±πμ±μ±)<8.6×1011 at 90% CL. [...]
arXiv:1612.04723; CERN-EP-2016-310.- Geneva : CERN, 2017-06-10 - 10 p. - Published in : Phys. Lett. B 769 (2017) 67-76 Article from SCOAP3: PDF; Fulltext: arXiv:1612.04723 - PDF; fermilab-pub-16-700-td - PDF;
10.
ChPT tests at the NA48 and NA62 experiments at CERN / for the NA48/2 and NA62 Collaborations
The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) (K±π+πe±ν) and Ke4(00) (K±π0π0e±ν) with nearly one percent background contamination. The detailed study of form factors and branching rates, based on these data, has been completed recently. [...]
arXiv:1601.08014.- 2014 - 8 p. - Published in : PoS HQL2014 (2014) 022 Fulltext: pdf - PDF; arXiv:1601.08014 - PDF; Published version from PoS: PDF; External link: Preprint
In : XIIth International Conference on Heavy Quarks and Leptons 2014, Mainz, Germany, 25 - 29 Aug 2014, pp.022

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