Y. Niu

works on

BESIII 1 charm mesons 1 e+e- collisions 1 mass difference 1 precision measurement 1

From the 1 of 13 linked papers with an AI index.

collaborators

13 papers

hep-ex2026

Precision Measurement of $D_{s}^{*+}$ - $D_{s}^{+}$ Mass Difference

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

The paper reports a precise measurement of the mass difference between the charm-strange mesons D_s*+ and D_s+ using e⁺e⁻ collision data collected by the BESIII detector.

hep-ex2026

Study of the reactions $n ˉ p \to 2 I ¨ ^{+} I ¨ ^{-}$ , $2 I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ , and $2 I ¨ ^{+} I ¨ ^{-} 2 I ¨ ^{0}$ using $J / I ¨ \to p I ¨ ^{-} n ˉ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

We report an experimental investigation of the reactions $n ˉ p \to 2 I ¨ ^{+} I ¨ ^{-}$ , $n ˉ p \to 2 I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ , and $n ˉ p \to 2 I ¨ ^{+} I ¨ ^{-} 2 I ¨ ^{0}$ using $(10.087…

hep-ex2026

Search for the charmonium semi-leptonic weak decay $J / I ¨ \to D_{s}^{-} e^{+} I^½_{e} + c . c .$

BESIII Collaboration, M. Ablikim, M. N. Achasov +685

Using a data sample of $(10087 \pm 44) \times 1 0^{6}$ $J / I ¨ $ events collected with the BESIII detector at a centre-of-mass energy of $s = 3.097 GeV$ , a dedicated searc…

hep-ex2026

Search for a hypothetical gauge boson and dark photons in charmonium transitions

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

We report a direct search for a new gauge boson, $X$ , with a mass of $17 MeV / c^{2}$ , which could explain the anomalous excess of $e^{+} e^{-}$ pairs observed in the $^{8} Be$ n…

hep-ex2025

First measurements of the branching fractions of $J / I ¨ \to I^^{0} I^ˉ K_{S}^{0} + c . c .$ , $J / I ¨ \to I^^{0} I^ˉ £^{0} K_{S}^{0} + c . c .$ , and $J / I ¨ \to I^^{0} I^ˉ £^{-} K^{+} + c . c .$

BESIII Collaboration, M. Ablikim, M. N. Achasov +686

By analyzing $(10087 \pm 44) \times 1 0^{6}$ $J / I ¨ $ events collected with the BESIII detector at the BEPCII, the decays $J / I ¨ \to I^^{0} I^ˉ K_{S}^{0} + c . c .$ , $J / I ¨ \to I^^{0} I^ˉ £^{0} K_{S}^{0} + c . c .$ …

hep-ex2025

Measurement of branching fractions of $I^_{c}^{+}$ decays to $I^£^{+} I^\cdot$ and $I^£^{+} I^\cdot^{'}$

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

By analyzing $e^{+} e^{-}$ collision data taken at center-of-mass energies $s$ between 4.600 and 4.699 GeV with the BESIII detector at the BEPCII collider, corresponding to an in…

Precision Measurement of Ds∗+​-Ds+​ Mass Difference

Study of the reactions nˉp→2I¨+I¨−, 2I¨+I¨−I¨0, and 2I¨+I¨−2I¨0 using J/I¨→pI¨−nˉ

Search for the charmonium semi-leptonic weak decay J/I¨→Ds−​e+I^½e​+c.c.

Search for a hypothetical gauge boson and dark photons in charmonium transitions

First measurements of the branching fractions of J/I¨→I^0I^ˉKS0​+c.c., J/I¨→I^0I^ˉ£0KS0​+c.c., and J/I¨→I^0I^ˉ£−K++c.c.

Measurement of branching fractions of I^c+​ decays to I^£+I^⋅ and I^£+I^⋅′

Precision Measurement of $D_{s}^{*+}$ - $D_{s}^{+}$ Mass Difference

Study of the reactions $n ˉ p \to 2 I ¨ ^{+} I ¨ ^{-}$ , $2 I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ , and $2 I ¨ ^{+} I ¨ ^{-} 2 I ¨ ^{0}$ using $J / I ¨ \to p I ¨ ^{-} n ˉ$

Search for the charmonium semi-leptonic weak decay $J / I ¨ \to D_{s}^{-} e^{+} I^½_{e} + c . c .$

First measurements of the branching fractions of $J / I ¨ \to I^^{0} I^ˉ K_{S}^{0} + c . c .$ , $J / I ¨ \to I^^{0} I^ˉ £^{0} K_{S}^{0} + c . c .$ , and $J / I ¨ \to I^^{0} I^ˉ £^{-} K^{+} + c . c .$

Measurement of branching fractions of $I^_{c}^{+}$ decays to $I^£^{+} I^\cdot$ and $I^£^{+} I^\cdot^{'}$