X. Liu

activity

20242026

collaborators

14 papers

astro-ph.HE2026

Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV

LHAASO Collaboration, Zhen Cao, F. Aharonian +321

We report a measurement of the cosmic ray helium energy spectrum in the energy interval 0.16 -- 13~PeV, derived by subtracting the proton spectrum from the light component~(proton…

hep-ex2026

Study of $I^\cdot \to I ¨ ^{+} I ¨ ^{-} l^{+} l^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +639

Using a sample of $(10087 \pm 44) \times 1 0^{6}$ $J / I ¨ $ events accumulated with the BESIII detector, we analyze the decays $I^\cdot \to I ¨ ^{+} I ¨ ^{-} l^{+} l^{-}$ ( $l = e$ or $I^¼$ ) via the process…

hep-ex2025

Observation of Charmonium $h_{c}$ Radiative Decays to Multiple Light Hadrons and the Tensor State $f_{2} (1270)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +668

Using $I ¨ (3686) \to I ¨ ^{0} h_{c}$ decays from a data sample of $(27.12 \pm 0.14) \times 1 0^{8}$ $I ¨ (3686)$ events collected by the BESIII detector at the BEPCII collider, $h_{c}$ …

hep-ex2025

Measurement of the phase between strong and electromagnetic amplitudes in the decay $J / I ¨ \to I ¨ I^\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +652

The first direct measurement of the relative phase between the strong and electromagnetic amplitudes for a $J / I ¨ $ decaying into a vector-pseudoscalar final state is performed using…

hep-ex2025

Observation of the charmonium decay $I^\cdot_{c} \to I^^{3} I^^{3}$ in $J / I ¨ \to I^^{3} I^\cdot_{c}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +662

Using $(2712.4 \pm 14.3) \times 1 0^{6}$ $I ¨ (3686)$ events collected with the BESIII detector at the BEPCII collider, the decay $I^\cdot_{c} \to I^^{3} I^^{3}$ in $J / I ¨ \to I^^{3} I^\cdot_{c}$ is observed. We determin…

hep-ex2025

Precision measurement of the branching fraction for the decay $I ¨ (2 S) \to I ¨ ^{+} I ¨ ^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +684

Using $(2259.3 \pm 11.1) \times 1 0^{6}$ $I ¨ (2 S)$ events acquired with the BESIII detector, the branching fraction of $I ¨ (2 S) \to I ¨ ^{+} I ¨ ^{-}$ is measured with improved precisi…

Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV

Study of I^⋅→I¨+I¨−l+l−

Observation of Charmonium hc​ Radiative Decays to Multiple Light Hadrons and the Tensor State f2​(1270)

Measurement of the phase between strong and electromagnetic amplitudes in the decay J/I¨→I¨I^⋅

Observation of the charmonium decay I^⋅c​→I^3I^3 in J/I¨→I^3I^⋅c​

Precision measurement of the branching fraction for the decay I¨(2S)→I¨+I¨−

Study of $I^\cdot \to I ¨ ^{+} I ¨ ^{-} l^{+} l^{-}$

Observation of Charmonium $h_{c}$ Radiative Decays to Multiple Light Hadrons and the Tensor State $f_{2} (1270)$

Measurement of the phase between strong and electromagnetic amplitudes in the decay $J / I ¨ \to I ¨ I^\cdot$

Observation of the charmonium decay $I^\cdot_{c} \to I^^{3} I^^{3}$ in $J / I ¨ \to I^^{3} I^\cdot_{c}$

Precision measurement of the branching fraction for the decay $I ¨ (2 S) \to I ¨ ^{+} I ¨ ^{-}$