V. Obraztsov

activity

19972026

most citedStudy of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c

333 citations · 2.6k across the 81 of their papers we have counts for

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73 papers · 1 filter

hep-ex2026

A search for the dark photon in the OKA experiment

The OKA Collaboration, A. S. Sadovsky, A. P. Filin +35

A search for the massless dark photon in the decay $K^{+} \to π^{+} π^{0} γ$ is performed with the OKA detector exposed to 17.7 GeV/c RF separated secondary beam of the…

hep-ex2024

The upper limit on the $K^{+} \to π^{0} π^{0} π^{0} e^{+} ν$ decay

A. V. Kulik, S. N. Filippov, E. N. Gushchin +26

A search for the $K^{+} \to π^{0} π^{0} π^{0} e^{+} ν$ decay is performed by the OKA collaboration. The search is based on $3.65 \times 1 0^{9} K^{+}$ decays. No signal is observed. The upp…

hep-ex2023

Observation of $K^{+} \to π^{+} π^{0} π^{0} γ$ decay

S. N. Filippov, E. N. Gushchin, A. A. Khudyakov +29

The $K^{+} \to π^{+} π^{0} π^{0} γ$ decay is observed by the OKA collaboration. The branching ratio is measured to be $(4.1 \pm 0.9 (s t a t) \pm 0.4 (sy s t)) \times 1 0^{- 6}$ . The branching…

hep-ex2023★ 3 cited

Searches for the light invisible axion-like particle in $K^{+} \to π^{+} π^{0} a$ decay

A. S. Sadovsky, A. P. Filin, S. A. Akimenko +31

A high statistics data sample of the $K^{+}$ decays is recorded by the OKA collaboration. A missing mass analysis is performed to search for a light invisible pseudoscalar axion-li…

hep-ex2022★ 7 cited

Measurement of T-odd asymmetry in radiative K+ -> pi0 e+ nu gamma decay using OKA detector

A. Yu. Polyarush, S. A. Akimenko, A. V. Artamonov +32

The paper presents a measurement of the T-odd correlation in radiation decay \boldmath $K^{+} \to π^{0} e^{+} ν_{e} γ$ performed on the installation of the 101200 candidate e…

hep-ex2020★ 16 cited

Study of $K^{+} \to π^{0} e^{+} ν γ$ decay with OKA setup

A. Yu. Polyarush, V. A. Duk, S. N. Filippov +34

Results of a study of the $K^{+} \to π^{0} e^{+} ν γ$ decay at OKA setup are presented. More than 32000 events of this decay are observed. The differential spectra over the ph…

hep-ex2019★ 13 cited

Measurement of the $K^{+} \to μ^{+} ν_{μ} γ$ decay form factors in the OKA experiment

V. I. Kravtsov, V. A. Duk, S. N. Filippov +36

A precise measurement of the vector and axial-vector form factors difference $F_{V} - F_{A}$ in the $K^{+} \to μ^{+} ν_{μ} γ$ decay is presented. About 95K events of $K^+\rightarrow{μ^…

hep-ex2019★ 72 cited

Search for production of an invisible dark photon in $π^{0}$ decays

NA62 collaboration

The results of a search for $π^{0}$ decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of $4.12 \times 1 0^{8}$ tagg…

hep-ex2019★ 12 cited

KLEVER: An experiment to measure BR( $K_{L} \to π^{0} ν ν ˉ$ ) at the CERN SPS

F. Ambrosino, R. Ammendola, A. Antonelli +75

Precise measurements of the branching ratios for the flavor-changing neutral current decays $K \to π ν ν ˉ$ can provide unique constraints on CKM unitarity and, potentially, evidence…

hep-ex2018★ 71 cited

First search for $K^{+} \to π^{+} ν ν ˉ$ using the decay-in-flight technique

NA62 collaboration

The NA62 experiment at the CERN SPS reports the first search for $K^{+} \to π^{+} ν ν ˉ$ using the decay-in-flight technique, based on a sample of $1.21 \times 1 0^{11}$ $K^{+}$ de…

hep-ex2018★ 5 cited

Study of the decay $K^{+} \to π^{+} π^{-} π^{+} γ$ in the OKA experiment

M. M. Shapkin, S. A. Akimenko, A. V. Artamonov +37

A high statistics data sample of the decays of $K^{+}$ mesons to three charged particles was accumulated by the OKA experiment in 2012 and 2013. This allowed to select a clean sample…

hep-ex2018

Search for $K^{+} \to π^{+} ν ν$ at NA62

NA62 Collaboration, G. Aglieri Rinella, R. Aliberti +249

$K^{+} \to π^{+} ν ν$ is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experi…

hep-ex2017★ 25 cited

Search for heavy neutrino in $K^{+} \to μ^{+} ν_{H}$ decay

A. S. Sadovsky, V. F. Kurshetsov, A. P. Filin +38

A high statistics data sample of the $K^{+} \to μ^{+} ν_{μ}$ decay was accumulated by the OKA experiment in 2012. The missing mass analysis was performed to search for the decay channel…

hep-ex2016

Search for $K^{+} \to π^{+} ν ν ˉ$ at NA62

Matthew Moulson

The decay $K^{+} \to π^{+} ν ν ˉ$ is highly suppressed in the Standard Model (SM), while its rate can be predicted with minimal theoretical uncertainty. The branching ratio (BR) for this…

hep-ex2016★ 13 cited

Search for the rare decay $K^{+} \to μ^{+} ν ν ˉ ν$

A. V. Artamonov, B. Bassalleck, B. Bhuyan +57

Evidence of the $K^{+} \to μ^{+} ν ν ˉ ν$ decay was searched for using E949 experimental data with an exposure of $1.70 \times 1 0^{12}$ stopped kaons. The data sample is dominated by the b…

hep-ex2016

ChPT tests at the NA48 and NA62 experiments at CERN

NA48/2, NA62 Collaborations, : +159

The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) ( $K^{\pm} \to π^{+} π^{-} e^{\pm} ν$ ) and Ke4(00) ($K^\pm \to π^0 π^…

hep-ex2014★ 102 cited

Search for heavy neutrinos in $K^{+} \to μ^{+} ν_{H}$ decays

A. V. Artamonov, B. Bassalleck, B. Bhuyan +57

Evidence of a heavy neutrino, $ν_{H}$ , in the $K^{+} \to μ^{+} ν_{H}$ decays was sought using the E949 experimental data with an exposure of $1.70 \times 1 0^{12}$ stopped kaons. With the major…

hep-ex2014

Recent NA48/2 and NA62 results

F. Ambrosino, A. Antonelli, G. Anzivino +156

The NA48/2 Collaboration at CERN has accumulated and analysed unprecedented statistics of rare kaon decays in the $K_{e 4}$ modes: $K_{e 4} (+ -)$ ( $K^{\pm} \to π^{+} π^{-} e^{\pm} ν$ ) and $K_…

hep-ex2014★ 22 cited

First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider

R. Aaij, B. Adeva, M. Adinolfi +700

The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in $b b ˉ$ pair production…

hep-ex2013★ 15 cited

Branching fraction and CP asymmetry of the decays $B^{+} \to K_{S}^{0} π^{+}$ and $B^{+} \to K_{S}^{0} K^{+}$

LHCb collaboration, R. Aaij, B. Adeva +655

An analysis of $B^{+} \to K_{S}^{0} π^{+}$ and $B^{+} \to K_{S}^{0} K^{+}$ decays is performed with the LHCb experiment. The $pp$ collision data u…

hep-ex2013★ 120 cited

Measurement of CP violation in the phase space of $B^{\pm} \to K^{\pm} π^{+} π^{-}$ and $B^{\pm} \to K^{\pm} K^{+} K^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +647

The charmless decays $B^{\pm} \to K^{\pm} π^{+} π^{-}$ and $B^{\pm} \to K^{\pm} K^{+} K^{-}$ are reconstructed using data, corresponding to an integrated luminosity of 1.0 fb $^{- 1}$ , collected b…

hep-ex2012★ 47 cited

Observation of CP violation in B+ to DK+ decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +589

An analysis of B+ to DK+ and B+ to Dpi+ decays is presented where the D meson is reconstructed in the two-body final states: K+pi-, K+K-, pi+pi- and pi+K-. Using 1.0 fb-1 of LHCb d…

hep-ex2011★ 16 cited

Search for Heavy Neutrino in K->mu nu_h(nu_h-> nu gamma) Decay at ISTRA+ Setup

ISTRA+ collaboration, :, V. A. Duk +19

Heavy neutrino nu_h with m_h < 300MeV/c^2 can be effectively searched for in kaon decays. We put upper limits on mixing matrix element |U_mu_h}|^2 for radiatively decaying nu_h fro…

hep-ex2011★ 39 cited

Test of Lepton Flavour Universality in K+ --> l+nu Decays

C. Lazzeroni et al.

A precision test of lepton flavour universality has been performed by measuring the ratio RK of kaon leptonic decay rates K+ --> e+nu and K+ --> mu+nu in a sample of 59813 reconstr…

A search for the dark photon in the OKA experiment

The upper limit on the K+→π0π0π0e+ν decay

Observation of K+→π+π0π0γ decay

Searches for the light invisible axion-like particle in K+→π+π0a decay

Measurement of T-odd asymmetry in radiative K+ -> pi0 e+ nu gamma decay using OKA detector

Study of K+→π0e+νγ decay with OKA setup

Measurement of the K+→μ+νμ​γ decay form factors in the OKA experiment

Search for production of an invisible dark photon in π0 decays

KLEVER: An experiment to measure BR(KL​→π0ννˉ) at the CERN SPS

First search for K+→π+ννˉ using the decay-in-flight technique

Study of the decay K+→π+π−π+γ in the OKA experiment

Search for K+→π+νν at NA62

Search for heavy neutrino in K+→μ+νH​ decay

Search for K+→π+ννˉ at NA62

Search for the rare decay K+→μ+ννˉν