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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - New Result on K+ → φ+v v from the NA62 Experiment
AU - Ruggiero, G.
PY - 2020/6/2
Y1 - 2020/6/2
N2 - The NA62 experiment at the CERN SPS is designed to measure the branching ratio of the K+ → φ+v v with a decay-in-ight technique and took data in 2016{2018. The statistics collected in 2017 allows NA62 to achieve the best up{to{date single event sensitivity for K+ → φ+v v corresponding to more than 2 Standard Model K+ → φ+v v expected events. The analysis of the 2017 data has revealed 2 candidate K+ → φ+v v events, while 1.5 background were expected. Together with the candidate found on the 2016 data, this result leads to 1:85 × 10-10 as preliminary upper limit at 90% C.L. on the branching ratio of the K+ → φ+v v decay. The 2017 data also allow NA62 to achieve the best up{to{date sensitivity on the search for the φ0 → invisible decay.
AB - The NA62 experiment at the CERN SPS is designed to measure the branching ratio of the K+ → φ+v v with a decay-in-ight technique and took data in 2016{2018. The statistics collected in 2017 allows NA62 to achieve the best up{to{date single event sensitivity for K+ → φ+v v corresponding to more than 2 Standard Model K+ → φ+v v expected events. The analysis of the 2017 data has revealed 2 candidate K+ → φ+v v events, while 1.5 background were expected. Together with the candidate found on the 2016 data, this result leads to 1:85 × 10-10 as preliminary upper limit at 90% C.L. on the branching ratio of the K+ → φ+v v decay. The 2017 data also allow NA62 to achieve the best up{to{date sensitivity on the search for the φ0 → invisible decay.
KW - Physics
KW - Branching ratio
KW - New results
KW - Single event
KW - Standard model
KW - Upper limits
KW - Hadrons
U2 - 10.1088/1742-6596/1526/1/012003
DO - 10.1088/1742-6596/1526/1/012003
M3 - Journal article
VL - 1526
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012003
T2 - International Conference on Kaon Physics 2019
Y2 - 10 September 2019 through 13 September 2019
ER -