Fu-Sheng Yu

New horizon in particle physics: first observation of CP violation in baryon decays

Fu-Sheng Yu, Cai-Dian LÃ¼

Recently, the LHCb Collaboration achieved the observation of CP violation (CPV) in baryon decays through the process of $I^_{b}^{0} \to p K^{-} I ¨ ^{+} I ¨ ^{-}$ , reporting an asymmetry of $(2.45\p…

hep-ex2025

CP violation studies at Super Tau-Charm Facility

Hai-Yang Cheng, Zhi-Hui Guo, Xiao-Gang He +16

Charge-parity ( $C P$ ) violation in the tau-charm energy region is a promising area for sensitive tests of Standard Model (SM) predictions and searches for new, beyond the SM physi…

Discovery potentials of double-charm tetraquarks

Qin Qin, Yin-Fa Shen, Fu-Sheng Yu

In this study, we investigate the discovery potential of double-charm tetraquarks $T_{[q ˉ q ˉ^{'}]}^{{cc}}$ . We find that their production cross sections at the LHCb with $\…

hep-ph2014

Photon Polarization in the b->s gamma processes in the Left-Right Symmetric Model

Fu-Sheng Yu, Emi Kou, Cai-Dian LÃ¼

The circular-polarization of the photon in the radiative B decays is dominantly left-handed in the Standard Model (SM), but the right-handed polarization may be enhanced in some ne…

hep-ph2016

Test Flavor SU(3) symmetry in Exclusive $I^_{c}$ decays

Cai-Dian LÃ¼, Wei Wang, Fu-Sheng Yu

Flavor SU(3) symmetry is a powerful tool to analyze charmed baryon decays, however its applicability remains to be experimentally validated. Since there is not much data on $I^_{c}$ …

hep-ph2014

Branching ratios and direct CP asymmetries in $D \to P V$ decays

Qin Qin, Hsiang-nan Li, Cai-Dian LÃ¼ +1

We study the two-body hadronic $D \to P V$ decays, where $P$ ( $V$ ) denotes a pseudoscalar (vector) meson, in the factorization-assisted topological-amplitude approach proposed in our…

Final-state rescattering mechanism of double-charm baryon decays: $B_{cc} \to B_{c} P$

Xiao-Hui Hu, Cai-Ping Jia, Ye Xing +1

In this study, we examine the non-leptonic weak decays of doubly charmed baryons, denoted as $B_{cc} \to B_{c} P$ , where $B_{cc}$ represents the doubly charmed ba…

$C P$ violation in charmed hadron decays into neutral kaons

Di Wang, Fu-Sheng Yu, Hsiang-nan Li

We find a new $C P$ violating effect in charmed hadron decays into neutral kaons, which is induced by the interference between the Cabibbo-favored and doubly Cabibbo-suppressed ampl…

hep-lat2025

Ill-Posedness in Limited Discrete Fourier Inversion and Regularization for Quasi Distributions in LaMET

Ao-Sheng Xiong, Jun Hua, Ting Wei +3

We systematically investigated the limited inverse discrete Fourier transform of the quasi distributions from the perspective of inverse problem theory. This transformation satisfi…

$K_{S}^{0} - K_{L}^{0}$ asymmetries in $D$ -meson decays

Di Wang, Fu-Sheng Yu, Peng-Fei Guo +1

The $K_{S}^{0} - K_{L}^{0}$ asymmetries in the $D$ meson decays, induced by the interference between the Cabibbo-favored and the doubly Cabibbo-suppressed amplitudes, can help to und…

The $I^_{b} \to I^$ transition form factors in perturbative QCD approach

Lei Yang, Jia-Jie Han, Qin Chang +1

In this work, we investigate the $I^_{b} \to I^$ transition form factors in the perturbative QCD (PQCD) approach, incorporating higher-twist light-cone distribution amplitudes (LCDAs…

hep-ex2019

Summary of WG7 at CKM 2018: "Mixing and $C P$ violation in the $D$ system: $x_{D}$ , $y_{D}$ , $∣ q / p ∣_{D}$ , $I ¨ _{D}$ , and direct $C P$ violation in $D$ decays"

Vishal Bhardwaj, Mirco Dorigo, Fu-Sheng Yu

The "10 $^{th}$ International Workshop on the CKM Unitary Triangle" took place at the University of Heidelberg on September 17 $^{th}$ -21 $^{st}$ , 2018. In this write-up,…

hep-ph2023

Diagrammatic analysis of hidden- and open-charm tetraquark production in $B$ decays

Qin Qin, Jing-Liang Qiu, Fu-Sheng Yu

Discoveries of tetraquarks not only enrich the hadronic spectrum but also provide more platforms to understand quantum chromodynamics. We study the production processes of hidden-c…

Inclusive approach to hunt for the beauty-charmed baryons $I^_{b c}$

Qin Qin, Yu-Ji Shi, Wei Wang +3

With a distinctive internal structure from all established hadrons, the beauty-charmed baryons $I^_{b c}$ can provide us with new points of view to decipher the strong interaction.…

Transition form factors of the $I^_{b} \to I^ (1520)$ in QCD light-cone sum rules

Ke-Sheng Huang, Hua-Yu Jiang, Fu-Sheng Yu

In this work, we investigate the transition form factors for $I^_{b} \to I^ (1520)$ within the framework of light-cone sum rules (LCSR), using the light-cone distribution ampl…

Implications on the first observation of charm CPV at LHCb

Hsiang-nan Li, Cai-Dian LÃ¼, Fu-Sheng Yu

Very recently, the LHCb Collaboration observed the $C P$ violation (CPV) in the charm sector for the first time, with $ÎA_{CP}^{\rm dir}\equiv A_{CP}(D^0\to K^+K^-)-A_{CP}(D^0\to Ï…

hep-ph2015

Analysis of Two-body Charmed $B$ Meson Decays in Factorization-Assisted Topological-Amplitude Approach

Si-Hong Zhou, Yan-Bing Wei, Qin Qin +3

Within the factorization-assisted topological-amplitude approach, we study the two-body charmed $B$ meson decays $B_{u, d, s} \to D^{(*)} M$ , with $M$ denoting a light pseudoscalar (o…

Probing Direct $C P$ Violation in $I^_{b}^{0} \to P_{c}^{+} h^{-}$ $(h = I ¨ , K)$ with Final-State Rescattering

Zhu-Ding Duan, Tian-Liang Feng, Rui-Hui Li +3

The LHCb collaboration has recently reported a measurement of the difference in direct CP asymmetries for the decays $I^_{b}^{0} \to J / I ¨ p h^{-}$ (with $h = K, I ¨ $ ), offering new e…

Discovery of $T_{c s ˉ 0}^{a} (2900)^{0, ++}$ implies new charmed-strange pentaquark system

Hong-Tao An, Zhan-Wei Liu, Fu-Sheng Yu +1

Inspired by the very recently discovered tetraquark states $T_{c s ˉ 0}^{a} (2900)^{0, ++}$ from the LHCb Collaboration, we predict the existence of a new charmed-strange pentaquark…

Final-state rescattering mechanism in bottom-baryon decays

Zhu-Ding Duan, Jian-Peng Wang, Run-Hui Li +2

The first observation of $C P$ violation in baryon decays was recently reported by the LHCb collaboration in $I^_{b}^{0} \to p K^{-} I ¨ ^{+} I ¨ ^{-}$ with $A_{C P} = (2.45 \pm 0.46 \pm 0.10) %$ , whi…

Complementary $C P$ violation induced by $T$ -odd and $T$ -even correlations

Jian-Peng Wang, Qin Qin, Fu-Sheng Yu

In this letter, we propose a novel approach to concurrently measure the complementary $C P$ violation observables induced by $T$ -odd correlations and their corresponding $T$ -even co…

hep-ph2014

Near Mass Degeneracy in the Scalar Meson Sector: Implications for $B_{(s) 0}^{*}$ and $B_{(s) 1}^{'}$ Mesons

Hai-Yang Cheng, Fu-Sheng Yu

The empirical observation of near degeneracy of scalar mesons above 1 GeV, namely, the mass of the strange-flavor scalar meson is similar to that of the non-strange one, is at vari…

Invisible and Semi-invisible Decays of Bottom Baryons

Yong Zheng, Jian-Nan Ding, Dong-Hao Li +3

The similar densities of dark matter and baryons in the universe imply that they might arise from the same ultraviolet model. The B-Mesogenesis, which assumes dark matter is charge…

Colour and baryon number fluctuation of preconfinement system in production process and T_cc structure

Yi Jin, Shi-Yuan Li, Yan-Rui Liu +3

We suggest to study the production mechanism and some details of the production properties to probe the structure of the DDpi resonance T_cc^+ recently observed by the LHCb Collabo…

Revisiting Quark Confinement in the Proton through the Force on Quarks

Ji-Xin Yu, Ao-Sheng Xiong, Ji Xu +2

Quark confinement, the fact that colored quarks are permanently bound inside color-neutral hadrons and have never been observed as isolated particles, remains one of the central is…

hep-ph2023

$I^_{b} \to p, N^{*} (1535)$ Form Factors from QCD Light-Cone Sum Rules

Ke-Sheng Huang, Wei Liu, Yue-Long Shen +1

In this work we calculate the transition form factors of $I^_{b}$ decaying into proton and $N^{*} (1535)$ ( $J^{P} = 1/2^{+}$ and $1/2^{-}$ respectively), within the framework of light-cone…

Weak Decays of Doubly Heavy Baryons: the $1/2 \to 1/2$ case

Wei Wang, Fu-Sheng Yu, Zhen-Xing Zhao

Very recently, the LHCb collaboration has observed in the final state $I^_{c}^{+} K^{-} I ¨ ^{+} I ¨ ^{+}$ a resonant structure that is identified as the doubly-charmed baryon $I^_{cc}^{++}$ . Insp…

$K_{S}^{0} - K_{L}^{0}$ Asymmetries and $C P$ Violation in Charmed Baryon Decays into Neutral Kaons

Di Wang, Peng-Fei Guo, Wen-Hui Long +1

We study the $K_{S}^{0} - K_{L}^{0}$ asymmetries and $C P$ violations in charm-baryon decays with neutral kaons in the final state. The $K_{S}^{0} - K_{L}^{0}$ asymmetry can be used to search for two-b…

Discovery Potentials of Doubly Charmed Baryons

Fu-Sheng Yu, Hua-Yu Jiang, Run-Hui Li +3

The existence of doubly heavy flavor baryons has not been well established experimentally so far. In this Letter we systematically investigate the weak decays of the doubly charmed…

hep-ph2011

Nonleptonic two-body decays of charmed mesons

Fu-Sheng Yu, Xiao-Xia Wang, Cai-Dian LÃ¼

Nonleptonic decays of charmed mesons into two pseudoscalar mesons or one pseudoscalar meson and one vector meson are studied on the basis of a generalized factorization method cons…

hep-ex2020

Role of decay in the searches for double-charm baryons

Fu-Sheng Yu

Invited viewpoint on the role of decay in the search of the single-charge double-charm baryon by the LHCb Collaboration.

hep-th2026

Inverse Problem Approach for Non-Perturbative QCD: Theoretical Foundation

Ao-Sheng Xiong, Fu-Sheng Yu, Yong Zheng +1

A novel theoretical framework, the inverse problem approach, is proposed to calculate non-perturbative quantities in quantum chromodynamics (QCD). Based on the dispersion relation…

Weak Decays of Stable Open-bottom Tetraquark by SU(3) Symmetry Analysis

Ye Xing, Fu-Sheng Yu, Ruilin Zhu

The exotic state $X (5568)$ which was observed by D0 Collaboration is very likely to be a tetraquark state with four different valence quark flavors, though the existence was not co…

Rescattering mechanism of weak decays of double-charm baryons

Jia-Jie Han, Hua-Yu Jiang, Wei Liu +2

The doubly charmed baryon $I^_{cc}^{++}$ was recently observed by LHCb via the decay processes of $I^_{cc}^{++} \to I^_{c}^{+} K^{-} I ¨ ^{+} I ¨ ^{+}$ and $I^_{c}^{+} I ¨ ^{+}$ . These discovery channels we…

Weak decays of bottom-charm baryons: $B_{b c} \to B_{b} P$

Jia-Jie Han, Rui-Xiang Zhang, Hua-Yu Jiang +2

After the discovery of the double-charm baryon $I^_{cc}^{++}$ by LHCb, one of the most important topics is to search for the bottom-charm baryons which contain a $b$ quark, a $c$ q…

Final-state rescattering mechanism of charmed baryon decays

Cai-Ping Jia, Hua-Yu Jiang, Jian-Peng Wang +1

The dynamical studies on the non-leptonic weak decays of charmed baryons are always challenging, due to the large non-perturbative contributions at the charm scale. In this work, w…

$I^_{b} \to p$ transition form factors in perturbative QCD

Jia-Jie Han, Ya Li, Hsiang-nan Li +3

We reanalyze the $I^_{b} \to p$ transition form factors in the perturbative QCD (PQCD) approach by including higher-twist light-cone distribution amplitudes (LCDAs) of a $I^_{b}$ baryon…

CP violation observables in baryon decays

Jian-Peng Wang, Qin Qin, Fu-Sheng Yu

The era of baryon physics is on the horizon with the accumulation of increasing data by collaborations such as LHCb, Belle II, and BESIII. Despite the wealth of data, one of the cr…

Study of $C P$ violation in $I^_{b}^{0} \to N^{*} M$ decays with the final-state rescattering mechanism

Hui-Qiang Shang, Tian-Liang Feng, Jing Gao +2

In this work, we investigate the charmless non-leptonic two-body $I^_{b}$ decays within the framework of final-state rescattering mechanism. In contrast to the Cutkosky cutting metho…

A self-consistent framework of topological amplitude and its $S U (N)$ decomposition

Di Wang, Cai-Ping Jia, Fu-Sheng Yu

We propose a systematic theoretical framework for the topological amplitudes of the heavy meson decays and their $S U (N)$ decomposition. In the framework, the topological amplitudes…

Tomography of high-twist proton structure through $e p$ elastic scattering

Ji-Xin Yu, Shan Cheng, Jia-Jie Han +2

We present the first high-twist study of the proton form factors $F_{1, 2} (Q^{2})$ in $e p$ elastic scattering based on the perturbative QCD $k_{T}$ factorization, $Q^{2}$ being momentum t…

$D^{0}$ - $D^{0}$ mixing parameter $y$ in the factorization-assisted topological-amplitude approach

Hua-Yu Jiang, Fu-Sheng Yu, Qin Qin +2

We calculate the $D^{0}$ - $D^{0}$ mixing parameter $y$ in the factorization-assisted topological-amplitude (FAT) approach, considering contributions from $D^{0} \to P P$ , $P V$ ,…

Final-state rescattering in $B ˉ_{(s)}^{0} \to I^_{c}^{+} I^ˉ _{c}^{-}$ decays

Zhu-Ding Duan, Xiao Huang, Dong-Hao Li +3

The LHCb Collaboration has recently reported the first observation of the decay $B ˉ_{s}^{0} \to I^_{c}^{+} I^ˉ _{c}^{-}$ , along with measurements of the branching fractions for both $\bar…

Weak-decay searches for $Q s u ˉ d ˉ$ tetraquarks

Fu-Sheng Yu

We propose to search for the open heavy-flavor exotic states with the quark components of $Q s u ˉ d ˉ$ with $Q = b, c$ via their weak decays. If there exist such exotic states bel…

An analysis of nuclear parton distribution function based on relative entropy

Shu-Man Hu, Ao-Sheng Xiong, Ji Xu +2

In this work, we propose a method to quantify the difference between nuclear parton distribution functions in different nuclei and parton distribution functions in free nucleons us…

Exploring the neutron momentum distribution in nuclei through $I^^{3} n \to I ¨ ^{-} p$ at an electron-positron collider

Zi-Wei Yan, Shu-man Hu, Wei Wang +3

The neutron momentum distribution is essential both for reliably extracting fundamental free neutron observables from nuclear measurements and for probing the tensor force via the…

hep-ex2020

Charm CPV: observation and prospects

Miroslav Saur, Fu-Sheng Yu

An overview of the recent first observation of CP violation in the Charm sector by the LHCb collaboration. Selection of theoretical models explaining this measurement is reviewed.…

$C P$ asymmetries in charm decays into neutral kaons

Di Wang, Fu-Sheng Yu, Hsiang-nan Li

We find a new $C P$ -violation effect in charm decays into neutral kaons, which results from the interference between two tree (Cabibbo-favored and doubly Cabibbo-suppressed) amplitu…

$D$ meson mixing as an inverse problem

Hsiang-nan Li, Hiroyuki Umeeda, Fanrong Xu +1

We calculate the parameters $x$ and $y$ for the $D$ meson mixing in the Standard Model by considering a dispersion relation between them. The dispersion relation for a fictitious c…

Masses of Scalar and Axial-Vector B Mesons Revisited

Hai-Yang Cheng, Fu-Sheng Yu

The SU(3) quark model encounters a great challenge in describing even-parity mesons. Specifically, the $q q ˉ$ quark model has difficulties in understanding the light scalar meso…

hep-ex2023

Probing hyperon electric dipole moments with a full angular analysis

Jinlin Fu, Hai-Bo Li, Jian-Peng Wang +2

The electric dipole moment (EDM) of elementary particles, arising from flavor-diagonal $C P$ violation, serves as a powerful probe for new physics beyond the Standard Model and hold…

Probing hyperon CP violation from charmed baryon decays

Jian-Peng Wang, Fu-Sheng Yu

CP violation (CPV) in the baryon sectors has not yet been established experimentally. In this work, we propose to search for the hyperon CPV through the Cabibbo-favored charm-baryo…

hep-ph2012

Branching ratios and direct CP asymmetries in $D \to P P$ decays

Hsiang-nan Li, Cai-Dian Lu, Fu-Sheng Yu

We propose a theoretical framework for analyzing two-body nonleptonic $D$ meson decays, based on the factorization of short-distance (long-distance) dynamics into Wilson coefficien…

CP Violation of Baryon Decays with $N I ¨ $ Scatterings

Jian-Peng Wang, Fu-Sheng Yu

There is a long-standing puzzle that the CP violation (CPV) in the baryon systems has never been well established in experiments, while the CPV of mesons have been observed by deca…

The time-dependent $C P$ asymmetry in $B^{0} \to K_{res} I^^{3} \to I ¨ ^{+} I ¨ ^{-} K_{S}^{0} I^^{3}$ decays

Simon Akar, Eli Ben-Haim, Jeremy Hebinger +2

The time-dependent $C P$ asymmetry in $B^{0} \to K_{res} I^^{3} \to I ¨ ^{+} I ¨ ^{-} K_{S}^{0} I^^{3}$ is sensitive to the photon polarisation in the quark level process $b \to s…

Branching fraction of $I^_{b c}^{+} \to I^_{c}^{+} J / I ¨ $ in the final-state-interaction approach

Xiao-Hui Hu, Cai-Ping Jia, Ye Xing +1

The process of $I^_{b c}^{+} \to I^_{c}^{+} J / I ¨ $ is among the most favored modes for searching for bottom-charm baryons. However, its branching fraction has never been studied in the…

Fragmentation-fraction ratio $f_{I^_{b}} / f_{I^_{b}}$ in $b$ - and $c$ -baryon decays

Hua-Yu Jiang, Fu-Sheng Yu

We study the ratio of fragmentation fractions, $f_{I^_{b}} / f_{I^_{b}}$ , from the measurement of $I^_{b}^{0} \to I^_{c}^{+} I ¨ ^{-}$ and $I^_{b}^{0} \to I^_{c}^{+} I ¨ ^{-}$ with $Î_{c}^{+}/Î_{c}^{+}\to p K^-Ï…

Heavy neutrino searches at future $Z$ -factories

Jian-Nan Ding, Qin Qin, Fu-Sheng Yu

We analyze the capacity of future $Z$ -factories to search for heavy neutrinos with their mass from 10 to 85 GeV. The heavy neutrinos $N$ are considered to be produced via the proce…

Study of $C P$ violation in $I^_{b}^{0} / I^_{b}^{-} \to I^ (1520) M$ decays with the final-state rescattering mechanism

Tian-Liang Feng, Hui-Qiang Shang, Jing Gao +2

Recently, the LHCb collaboration reported the first observation of $C P$ violation in baryon decays, with a significance of more than $5 I ¨ $ . This strongly motivates us to investigat…

Solving the Inverse Source Problem in Femtoscopy with a Toy Model

Ao-Sheng Xiong, Qi-Wei Yuan, Ming-Zhu Liu +3

Hadron-hadron interactions, as a non-perturbative effect, play a significant role in understanding phenomenological problems in particle physics. Femtoscopy is a powerful tool in h…

Revisiting semileptonic decays of $I^_{b (c)}$ supported by baryon spectroscopy

Yu-Shuai Li, Xiang Liu, Fu-Sheng Yu

The semileptonic decays of $I^_{b} \to I^_{c}^{(*)} ℓ I^½_{ℓ}$ and $I^_{c} \to I^^{(*)} ℓ I^½_{ℓ}$ are studied in the light-front quark model in this work. Instead of the quark-diqua…

Charmed baryon decays in $S U (3)_{F}$ symmetry

Cai-Ping Jia, Di Wang, Fu-Sheng Yu

In the recent years, fruitful results on charmed baryons are obtained by BESIII, Belle and LHCb. We investigate the two-body non-leptonic decays of charmed baryons in the flavor $S…

Strange Axial-vector Mesons in D Meson Decays

Peng-Fei Guo, Di Wang, Fu-Sheng Yu

The nature of strange axial-vector mesons are not well understood and can be investigated in $D$ meson decays. In this work, it is found that the experimental data of $D^0\rightarr…

Final-state rescattering mechanism of doubly-charmed baryon decays: $B_{cc} \to B_{c} V$

Xiao-Hui Hu, Fu-Sheng Yu, Ye Xing

We study the non-leptonic weak decays of doubly charmed baryons ( $B_{cc}$ ) into singly charmed baryons ( $B_{c}$ ) and vector mesons ( $V$ ), denoted as ${\cal B}_{cc}\to{\…

Branching fractions of $B^{-} \to D^{-} X_{0, 1} (2900)$ and their implications

Yan-Ke Chen, Jia-Jie Han, Qi-Fang LÃ¼ +2

The exotic states $X_{0, 1} (2900)$ with the quark flavor of $cs u ˉ d ˉ$ are recently observed in the mass spectrum of $D^{+} K^{-}$ in $B^{-} \to D^{-} D^{+} K^{-}$ by the LHCb collaboration…

Doubly-Heavy Baryon Weak Decays: $I^_{b c}^{0} \to p K^{-}$ and $I^_{cc}^{+} \to I^£_{c}^{++} (2520) K^{-}$

Run-Hui Li, Cai-Dian LÃ¼, Wei Wang +2

Doubly-heavy baryons, with two heavy and one light quarks, are expected to exist in QCD and their masses have been predicted in the quark model. However their existence is not well…

Charged lepton flavor violating Higgs decays at future $e^{+} e^{-}$ colliders

Qin Qin, Qiang Li, Cai-Dian LÃ¼ +2

After the discovery of the Higgs boson, several future experiments have been proposed to study the Higgs boson properties, including two circular lepton colliders, the CEPC and the…

First determination of $V_{cs, c d}$ from inclusive $D$ meson decays

Kang-Kang Shao, Hai-Long Feng, Xue-Yin Liu +3

We report the first determination of the Cabibbo-Kobayashi-Maskawa matrix elements $∣ V_{cs} ∣$ and $∣ V_{c d} ∣$ from a global fit to data from inclusive and sum-of-exclusive charm dec…

$C P$ violation in two-body hadronic $I^_{b}$ decays in the PQCD approach

Jia-Jie Han, Ji-Xin Yu, Ya Li +4

We systematically investigate the $C P$ -averaged branching ratios and $C P$ violations (CPVs) for the two-body hadronic decays $I^_{b} \to p h$ , where $h$ runs through the mesons $I ¨ ^{-}$ ,…

Establishing CP Violation in $b$ -Baryon Decays

Jia-Jie Han, Ji-Xin Yu, Ya Li +4

It is a long-standing puzzle why the {\it CP} violation (CPV) in the baryon system has not yet been definitively established as in the meson one. We demonstrate that individual par…