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Showing 2019 · hep-exShow all

68 papers · 2 filters

hep-ex2019★ 1 cited

Measurements of the Branching Fractions $B (B^{-} \to Λ ˉ_{c}^{-} Ξ_{c}^{^{'} 0})$ , $B (B^{-} \to Λ ˉ_{c}^{-} Ξ_{c} (2645)^{0})$ and $B (B^{-} \to Λ ˉ_{c}^{-} Ξ_{c} (2790)^{0})$

Belle Collaboration, Y. Li, Y. B. Li +173

Using the data sample of 711 fb $^{- 1}$ of $Υ (4 S)$ on-resonance data taken by the Belle detector at the KEKB asymmetric-energy electron-positron collider, we present the first measu…

hep-ex2019★ 30 cited

Observation of the $X (2370)$ and search for the $X (2120)$ in $J / ψ \to γ K K ˉ η^{'}$

M. Ablikim, M. N. Achasov, P. Adlarson +473

Using a sample of $1.31 \times 1 0^{9} J / ψ$ events collected with the BESIII detector, we perform a study of $J / ψ \to γ K K ˉ η^{'}$ . The $X (2370)$ is observed in the $K K ˉ η^{'}$ invari…

hep-ex2019★ 2 cited

Study of $B \to p p ˉ π π$

K. Chu, M. -Z. Wang, I. Adachi +174

Using a data sample of $772 \times 1 0^{6}$ BB pairs collected on the $Υ (4 S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we report the observat…

hep-ex2019★ 28 cited

Observation of $D^{+} \to η η π^{+}$ and improved measurement of $D^{0 (+)} \to η π^{+} π^{- (0)}$

BESIII Collaboration

Using an $e^{+} e^{-}$ annihilation data sample corresponding to an integrated luminosity of $2.93 f b^{- 1}$ collected at the center-of-mass energy of 3.773\,GeV with the BESIII det…

hep-ex2019★ 46 cited

Search for an invisibly decaying $Z^{'}$ boson at Belle II in $e^{+} e^{-} \to μ^{+} μ^{-} (e^{\pm} μ^{\mp})$ plus missing energy final states

Belle II Collaboration, I. Adachi, P. Ahlburg +358

Theories beyond the standard model often predict the existence of an additional neutral boson, the $Z^{'}$ . Using data collected by the Belle II experiment during 2018 at the…

hep-ex2019★ 6 cited

Measurement of the charm-mixing parameter $y_{C P}$ in $D^{0} \to K_{S}^{0} ω$ decays at Belle

Belle Collaboration, M. Nayak, D. Cinabro +179

We report the first measurement of the charm-mixing parameter $y_{C P}$ in $D^{0}$ decays to the $C P$ -odd final state $K_{S}^{0} ω$ . The study uses the full Belle $e^{+} e^{-}$ annihila…

hep-ex2019★ 25 cited

Partial wave analysis of $ψ (3686) \to K^{+} K^{-} η$

BESIII Collaboration, M. Ablikim, M. N. Achasov +479

Using a sample of $(448.1 \pm 2.9) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector, we perform the first partial wave analysis of $ψ (3686) \to K^{+} K^{-} η$ . In addi…

hep-ex2019★ 44 cited

Search for $B^{+} \to μ^{+} ν_{μ}$ and $B^{+} \to μ^{+} N$ with inclusive tagging

M. T. Prim, F. U. Bernlochner, P. Goldenzweig +191

We report the result for a search for the leptonic decay of $B^{+} \to μ^{+} ν_{μ}$ using the full Belle data set of 711 fb $^{- 1}$ of integrated luminosity at the $Υ (4 S)$ resonance.…

hep-ex2019★ 3 cited

Observation of the decays $χ_{c J} \to ϕϕ η$

BESIII Collaboration, M. Ablikim, M. N. Achasov +481

Using a data sample of $(448.1 \pm 2.9) \times 1 0^{6}$ $ψ (3686)$ decays collected by the BESIII detector at the Beijing Electron Positron Collider (BEPCII), we observe the decays $χ_{c…

hep-ex2019★ 34 cited

Observation of a vector charmoniumlike state in $e^{+} e^{-} \to D_{s}^{+} D_{s 1} (2536)^{-} + c . c .$

Belle Collaboration, S. Jia, C. P. Shen +171

Using a data sample of 921.9 fb $^{- 1}$ collected with the Belle detector, we study the process of $e^{+} e^{-} \to D_{s}^{+} D_{s 1} (2536)^{-} + c . c .$ via initial-state radiation. We report the fi…

hep-ex2019★ 10 cited

Search for baryon and lepton number violating decays $D^{+} \to Λ ˉ (Σ ˉ^{0}) e^{+}$ and $D^{+} \to Λ (Σ^{0}) e^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +480

Using a 2.93 fb $^{- 1}$ data sample of electron-positron collisions taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, which corresponds to $(8296\pm31\pm64)\ti…

hep-ex2019★ 10 cited

Measurement of {\boldmath $J / ψ \to Ξ (1530)^{-} Ξ ˉ^{+}$ } and evidence for the radiative decay {\boldmath $Ξ (1530)^{-} \to γ Ξ^{-}$ }

BESIII Collaboration, M. Ablikim, M. N. Achasov +478

The SU(3)-flavor violating decay $J / ψ \to Ξ (1530)^{-} Ξ ˉ^{+} + c . c .$ is studied using $(1310.6 \pm 7.0) \times 1 0^{6} J / ψ$ events collected with the BESIII detector at BEPCII and the b…

hep-ex2019★ 25 cited

Cross section measurement of $e^{+} e^{-} \to η^{'} J / ψ$ from $s = 4.178$ to $4.600$ GeV

M. Ablikim, M. N. Achasov, P. Adlarson +477

The cross section of the process $e^{+} e^{-} \to η^{'} J / ψ$ is measured at center-of-mass energies from $s =$ 4.178 to 4.600 GeV using data samples corresponding to a total…

hep-ex2019★ 2 cited

Observation of the radiative decays of $Υ (1 S)$ to $χ_{c 1}$

P. Katrenko, I. Adachi, H. Aihara +166

We report the first observation of the radiative decay of the $Υ (1 S)$ into a charmonium state. The statistical significance of the observed signal of $Υ (1 S) \to γ χ_{c 1}$ is 6.3 sta…

hep-ex2019★ 236 cited

Measurement of $R (D)$ and $R (D^{*})$ with a semileptonic tagging method

The Belle Collaboration, G. Caria, P. Urquijo +188

The experimental results on the ratios of branching fractions $R (D) = B (B ˉ \to D τ^{-} ν ˉ_{τ}) / B (B ˉ \to D ℓ^{-} ν ˉ_{ℓ})$ and $\mathcal{R}(D^…

hep-ex2019★ 36 cited

Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment

Belle II Collaboration, F. Abudinén, I. Adachi +420

From April to July 2018, a data sample at the peak energy of the $Υ (4 S)$ resonance was collected with the Belle~II detector at the SuperKEKB electron-positron collider. This is the…

hep-ex2019★ 46 cited

Measurement of the cross section for $e^{+} e^{-} \to Ξ^{-} Ξ ˉ^{+}$ and observation of an excited $Ξ$ baryon

BESIII Collaboration, M. Ablikim, M. N. Achasov +483

Using a total of 11.0 fb $^{- 1}$ of $e^{+} e^{-}$ collision data with center-of-mass energies between 4.009 GeV and 4.6 GeV and collected with the BESIII detector at BEPCII, we measu…

hep-ex2019★ 8 cited

First observation of the decay $χ_{c J} \to Σ^{+} p ˉ K_{S}^{0} + c . c . (J = 0, 1, 2)$

M. Ablikim, M. N. Achasov, P. Adlarson +478

Using E1 radiative transitions $ψ (3686) \to γ χ_{c J}$ from a sample of $(448.1 \pm 2.9) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector, the decays $χ_{cJ}\to Σ^{+}…

hep-ex2019★ 7 cited

Observation of $τ^{-} \to π^{-} ν_{τ} e^{+} e^{-}$ and search for $τ^{-} \to π^{-} ν_{τ} μ^{+} μ^{-}$

Belle Collaboration, Y. Jin, H. Aihara +195

We present the first measurements of branching fractions of rare tau-lepton decays, $τ^{-} \to π^{-} ν_{τ} ℓ^{+} ℓ^{-}$ ( $ℓ = e$ or $μ$ ), using a data sample corresponding t…

hep-ex2019★ 19 cited

Azimuthal asymmetries of back-to-back $π^{\pm} - (π^{0}, η, π^{\pm})$ pairs in $e^{+} e^{-}$ annihilation

Belle Collaboration, H. Li, A. Vossen +126

This work reports the first observation of azimuthal asymmetries around the thrust axis in $e^{+} e^{-}$ annihilation of pairs of back-to-back charged pions in one hemisphere, and $π^{0}$ …

hep-ex2019★ 8 cited

Study of $e^{+} e^{-} \to D^{+} D^{-} π^{+} π^{-}$ at center-of-mass energies from 4.36 to 4.60 GeV

M. Ablikim, M. N. Achasov, P. Adlarson +476

We report a study of the $e^{+} e^{-} \to D^{+} D^{-} π^{+} π^{-}$ process using $e^{+} e^{-}$ collision data samples with an integrated luminosity of $2.5 fb^{- 1}$ at center-o…

hep-ex2019★ 87 cited

Comprehensive geoneutrino analysis with Borexino

M. Agostini, K. Altenmüller, S. Appel +109

This paper presents a geoneutrino measurement using 3262.74 days of data taken with the Borexino detector at LNGS in Italy. By observing $52.6 ^{+9.4}_{-8.6} ({\rm stat}) ^{+2.7}_{…

hep-ex2019★ 7 cited

Search for the rare decay $η^{'} \to π^{0} π^{0} π^{0} π^{0}$ at BESIII

M. Ablikim, M. N. Achasov, P. Adlarson +476

Based on a sample of 1.31 billion $J / ψ$ events collected with the BESIII detector, we perform a search for the rare decay $η^{'} \to 4 π^{0}$ via $J / ψ \to γ η^{'}$ . No signifi…

hep-ex2019★ 11 cited

First measurement of the CKM angle $ϕ_{3}$ with $B^{\pm} \to D (K_{S}^{0} π^{+} π^{-} π^{0}) K^{\pm}$ decays

Belle Collaboration, P. K. Resmi, J. Libby +165

We present the first model-independent measurement of the CKM unitarity triangle angle $ϕ_{3}$ using $B^{\pm} \to D (K_{S}^{0} π^{+} π^{-} π^{0}) K^{\pm}$ decays, where $D$ indicates either a…

Measurements of the Branching Fractions B(B−→Λˉc−​Ξc′0​), B(B−→Λˉc−​Ξc​(2645)0) and B(B−→Λˉc−​Ξc​(2790)0)

Observation of the X(2370) and search for the X(2120) in J/ψ→γKKˉη′

Study of B→ppˉ​ππ

Observation of D+→ηηπ+ and improved measurement of D0(+)→ηπ+π−(0)

Search for an invisibly decaying Z′ boson at Belle II in e+e−→μ+μ−(e±μ∓) plus missing energy final states

Measurement of the charm-mixing parameter yCP​ in D0→KS0​ω decays at Belle

Partial wave analysis of ψ(3686)→K+K−η

Search for B+→μ+νμ​ and B+→μ+N with inclusive tagging

Observation of the decays χcJ​→ϕϕη

Observation of a vector charmoniumlike state in e+e−→Ds+​Ds1​(2536)−+c.c.

Search for baryon and lepton number violating decays D+→Λˉ(Σˉ0)e+ and D+→Λ(Σ0)e+

Measurement of {\boldmath J/ψ→Ξ(1530)−Ξˉ+} and evidence for the radiative decay {\boldmath Ξ(1530)−→γΞ−}

Cross section measurement of e+e−→η′J/ψ from s​=4.178 to 4.600 GeV

Observation of the radiative decays of Υ(1S) to χc1​

Measurement of R(D) and R(D∗) with a semileptonic tagging method