Y. Y. Ji

activity

20242026

collaborators

13 papers

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

Study of the electromagnetic Dalitz decay $J / I ¨ \to e^{+} e^{-} I ¨ ^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +640

We report the first measurement of the di-electron invariant mass dependent transition form factor in the electromagnetic Dalitz decay $J / I ¨ \to e^{+} e^{-} I ¨ ^{0}$ using $(10087 \pm 44) \…

hep-ex2025

Cross section measurement of $e^{+} e^{-} \to I^\cdot I ¨ (2 S)$ and search for $e^{+} e^{-} \to I^\cdot X ~ (3872)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +645

The energy-dependent cross section for $e^{+} e^{-} \to I^\cdot I ¨ (2 S)$ is measured at eighteen center of mass energies from 4.288 GeV to 4.951 GeV using the BESIII detector. Using the same da…

hep-ex2025

Search for a $1^{-+}$ molecular state via $e^{+} e^{-} \to I^^{3} D_{s}^{+} D_{s 1}^{-} (2536) + c . c .$

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

We search, for the first time, for an exotic molecular state with quantum numbers $J^{P C} = 1^{-+}$ , called $X$ , via the process $e^{+} e^{-} \to I^^{3} D_{s}^{+} D_{s 1}^{-} (2536) + c . c .$ u…

hep-ex2025

Measurement of Branching Fractions for $I^_{c}^{+} \to n K_{S}^{0} I ¨ ^{+}$ and $I^_{c}^{+} \to n K_{S}^{0} K^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +611

Based on 4.5 fb $^{- 1}$ of $e^{+} e^{-}$ collision data accumulated at center-of-mass energies between $4.600 GeV$ and $4.699 GeV$ with the BESIII detector, we me…

hep-ex2025

Partial wave analyses of $I ¨ (3686) \to p p ˉ I ¨ ^{0}$ and $I ¨ (3686) \to p p ˉ I^\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Using a sample of $(2712 \pm 14) \times 1 0^{6}$ $I ¨ (3686)$ events collected with the BESIII detector, we perform partial wave analyses of the decays $I ¨ (3686) \to p p ˉ I ¨ ^{0}$ and $Ï(36…

Study of I^⋅→I¨+I¨−l+l−

Study of the electromagnetic Dalitz decay J/I¨→e+e−I¨0

Cross section measurement of e+e−→I^⋅I¨(2S) and search for e+e−→I^⋅X~(3872)

Search for a 1−+ molecular state via e+e−→I^3Ds+​Ds1−​(2536)+c.c.

Measurement of Branching Fractions for I^c+​→nKS0​I¨+ and I^c+​→nKS0​K+

Partial wave analyses of I¨(3686)→ppˉ​I¨0 and I¨(3686)→ppˉ​I^⋅

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

Study of the electromagnetic Dalitz decay $J / I ¨ \to e^{+} e^{-} I ¨ ^{0}$

Cross section measurement of $e^{+} e^{-} \to I^\cdot I ¨ (2 S)$ and search for $e^{+} e^{-} \to I^\cdot X ~ (3872)$

Search for a $1^{-+}$ molecular state via $e^{+} e^{-} \to I^^{3} D_{s}^{+} D_{s 1}^{-} (2536) + c . c .$

Measurement of Branching Fractions for $I^_{c}^{+} \to n K_{S}^{0} I ¨ ^{+}$ and $I^_{c}^{+} \to n K_{S}^{0} K^{+}$

Partial wave analyses of $I ¨ (3686) \to p p ˉ I ¨ ^{0}$ and $I ¨ (3686) \to p p ˉ I^\cdot$