L. K. Li

activity

20242026

collaborators

22 papers

hep-ex2026

Test of lepton flavor universality with measurements of $R (D^{+})$ and $R (D^{*+})$ using semileptonic $B$ tagging at the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +450

We report measurements of the ratios of branching fractions ${\cal R}(D^{(*)+}) = \frac{{\cal B}(\overline{B}{}^0 \to D^{(*)+} \,Ï^- \, \overlineÎ½_Ï)}{{\cal B}(\overline{B}{}^0…

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

First observation of $I^_{c} (2595)^{+} \to I^_{c}^{+} I ¨ ^{0} I ¨ ^{0}$ and $I^_{c} (2625)^{+} \to I^_{c}^{+} I ¨ ^{0} I ¨ ^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +658

By analysing $e^{+} e^{-}$ annihilation data corresponding to an integrated luminosity of 368.48~pb $^{- 1}$ collected at the centre-of-mass energies of $s = 4.918$ and $4.951$ ~GeV…

hep-ex2025

Search for Pcs(4459) and Pcs(4338) in Upsilon(1S,2S) inclusive decays at Belle

I. Adachi, L. Aggarwal, H. Ahmed +402

Using data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we search f…

hep-ex2025

Search for lepton-flavor-violating tau decays to $ℓ I^\pm$ at Belle

Belle Collaboration, K. Uno, K. Hayasaka +123

We report a search for the lepton-flavor-violating decays $I ¨ ^{\pm} \to ℓ^{\pm} I^\pm$ ~( $ℓ = e, I^¼$ ), where $I^\pm$ is an undetected spin-0 particle, such as an axion-like particle using…

hep-ex2025

Observation of $D \to K ˉ_{1} (1270) I^¼^{+} I^½_{I^} ¼$ and test of lepton flavor universality with $D \to K ˉ_{1} (1270) ℓ^{+} I^½_{ℓ}$

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

By analyzing 7.93 $f b^{- 1}$ of $e^{+} e^{-}$ collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we report t…

Test of lepton flavor universality with measurements of R(D+) and R(D∗+) using semileptonic B tagging at the Belle II experiment

Study of I^⋅→I¨+I¨−l+l−

First observation of I^c​(2595)+→I^c+​I¨0I¨0 and I^c​(2625)+→I^c+​I¨0I¨0

Search for Pcs(4459) and Pcs(4338) in Upsilon(1S,2S) inclusive decays at Belle

Search for lepton-flavor-violating tau decays to ℓI^± at Belle

Observation of D→Kˉ1​(1270)I^¼+I^½I^​¼ and test of lepton flavor universality with D→Kˉ1​(1270)ℓ+I^½ℓ​

Test of lepton flavor universality with measurements of $R (D^{+})$ and $R (D^{*+})$ using semileptonic $B$ tagging at the Belle II experiment

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

First observation of $I^_{c} (2595)^{+} \to I^_{c}^{+} I ¨ ^{0} I ¨ ^{0}$ and $I^_{c} (2625)^{+} \to I^_{c}^{+} I ¨ ^{0} I ¨ ^{0}$

Search for lepton-flavor-violating tau decays to $ℓ I^\pm$ at Belle

Observation of $D \to K ˉ_{1} (1270) I^¼^{+} I^½_{I^} ¼$ and test of lepton flavor universality with $D \to K ˉ_{1} (1270) ℓ^{+} I^½_{ℓ}$