This content will become publicly available on June 1, 2022

Measurement of the energy dependence of the e+e− → $$B\overline{B}$$, $$B{\overline{B}}^{\ast }$$ and $${B}^{\ast }{\overline{B}}^{\ast }$$ exclusive cross sections
A bstract We report the first measurement of the exclusive cross sections e + e − → $$B\overline{B}$$ B B ¯ , e + e − → $$B{\overline{B}}^{\ast }$$ B B ¯ ∗ , and e + e − → $${B}^{\ast }{\overline{B}}^{\ast }$$ B ∗ B ¯ ∗ in the energy range from 10 . 63 GeV to 11 . 02 GeV. The B mesons are fully reconstructed in a large number of hadronic final states and the three channels are identified using a beam-constrained-mass variable. The shapes of the exclusive cross sections show oscillatory behavior with several maxima and minima. The results are obtained using data collected by the Belle experiment at the KEKB asymmetric-energy e + e − collider.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »
Award ID(s):
Publication Date:
NSF-PAR ID:
10304419
Journal Name:
Journal of High Energy Physics
Volume:
2021
Issue:
6
ISSN:
1029-8479
1. A bstract Using a data sample of 980 fb − 1 collected with the Belle detector at the KEKB asymmetric-energy e + e − collider, we study the processes of $${\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0}$$ Ξ c 0 → Λ K ¯ ∗ 0 , $${\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0}$$ Ξ c 0 → Σ 0 K ¯ ∗ 0 , and $${\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -}$$ Ξ c 0 → Σ + K ∗ − for the first time. The relative branching ratios to the normalization mode of $${\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}$$ Ξ c 0 → Ξ −more »
2. A bstract We present measurements of the branching fractions for the decays B → Kμ + μ − and B → Ke + e − , and their ratio ( R K ), using a data sample of 711 fb − 1 that contains 772 × 10 6 $$B\overline{B}$$ B B ¯ events. The data were collected at the ϒ(4 S ) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. The ratio R K is measured in five bins of dilepton invariant-mass-squared ( q 2 ): q 2 ∈ (0 . 1more »
3. A bstract We present a search for the dark photon A ′ in the B 0 → A ′ A ′ decays, where A ′ subsequently decays to e + e − , μ + μ − , and π + π − . The search is performed by analyzing 772 × 10 6 $$B\overline{B}$$ B B ¯ events collected by the Belle detector at the KEKB e + e − energy-asymmetric collider at the ϒ(4 S ) resonance. No signal is found in the dark photon mass range 0 . 01 GeV /c 2 ≤ m Amore »
4. A bstract A search for the exotic decay of the Higgs boson ( H ) into a b $$\overline{b}$$ b ¯ resonance plus missing transverse momentum is described. The search is performed with the ATLAS detector at the Large Hadron Collider using 139 fb − 1 of pp collisions at $$\sqrt{s}$$ s = 13 TeV. The search targets events from ZH production in an NMSSM scenario where H → $${\overset{\sim }{\chi}}_2^0{\overset{\sim }{\chi}}_1^0$$ χ ~ 2 0 χ ~ 1 0 , with $${\overset{\sim }{\chi}}_2^0$$ χ ~ 2 0 → $$a{\overset{\sim }{\chi}}_1^0more » 5. Abstract The production of$$\pi ^{\pm }$$π ± ,$$\mathrm{K}^{\pm }$$K ± ,$$\mathrm{K}^{0}_{S}$$K S 0 ,$$\mathrm{K}^{*}(892)^{0}$$K ∗ ( 892 ) 0 ,$$\mathrm{p}$$p ,$$\phi (1020)$$ϕ ( 1020 ) ,$$\Lambda $$Λ ,$$\Xi ^{-}$$Ξ - ,$$\Omega ^{-}$$Ω - , and their antiparticles was measured in inelastic proton–proton (pp) collisions at a center-of-mass energy of$$\sqrt{s}$$s = 13 TeV at midrapidity ($$|y|<0.5$$| y | < 0.5 ) as a function of transverse momentum ($$p_{\mathrm{T}} p T ) using the ALICE detector at the CERNmore »