Nonleptonic decays of 
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Liu, Xin; Xiao, Z. J.

doi:10.1103/physrevd.94.113005

Cited by 15 publications

(10 citation statements)

References 94 publications

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“…So far, the f 1 mesons have been investigated in the literature, for example, Refs. [5,8,9,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], but the value with definite sign, i.e., positive or negative, of ϕ is not yet available presently. Nevertheless, its determination from the B → J/ψf 1 (1285) decays for the first time by the LHCb Collaboration reveal a unique insight to these types of issues in the heavy flavor sector, which could in turn deepen our understanding on the nature of these states.…”

Section: Introductionmentioning

confidence: 99%

Phenomenological studies on neutral $B$-meson decays into $J/ψf_1$ and $η_c f_1$

Yao¹,

Liu²,

Liu³

et al. 2022

Preprint

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The neutral B-meson decays into J/ψf1 and ηcf1 are analyzed phenomenologically in the perturbative QCD (PQCD) approach at the known next-to-leading order accuracy, where f1 denotes the axial-vector mesons f1(1285) and f1(1420), the mixture of flavor fn and fs states in the quark-flavor basis. With the extracted mixing angle ϕ Theo ∼ 15 • and ϕ Exp ∼ 24 • , it is of great interest to find that (a) the B → J/ψf1 and ηcf1 decays have large branching ratios(B) that are measurable at Large Hadron Collider beauty and/or Belle-II experiments in the near future. The consistent results within errors in two referenced angles indicate that much more constraints on ϕ from various aspects are still urgently demanded; (b) the large B(B 0 s → (J/ψ, ηc)f1) through f1(1285) → 2π + 2π − , f1(1285) → ηπ + π − and f1(1420) → K 0 S K + π − may be experimentally probed more easily. Several interesting ratios among the B(B → (J/ψ, ηc)f1) are presented for future exploration on the determination of |ϕ| and/or on the estimation of SU(3)F symmetry breaking; (c) the direct CP violations in the B 0 d → (J/ψ, ηc)f1 decays are generally larger than those in the corresponding B 0 s channels with a factor around 20. It suggests that the B 0 s → (J/ψ, ηc)f1 decays could provide helpful information promisingly on constraining |ϕ| due to the highly small penguin contaminations. All the results and predictions will be confronted with the future examinations.

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Section: Introductionmentioning

confidence: 99%

Phenomenological studies on neutral $B$-meson decays into $J/ψf_1$ and $η_c f_1$

Yao¹,

Liu²,

Liu³

et al. 2022

Preprint

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“…In comparison with the existing searches for other decay modes, the h → γγ channel has a small cross section but has the great advantage that most QCD backgrounds are gone, such as done in Refs. [52,53]. This has recently been done by the CMS Collaboration in events with at least one top partner undergoing the T → th(h → γγ) decay chain from the T T production [54], which has excluded the existence of top quark partners with mass up to 540 GeV using 19.7 fb −1 of integrated luminosity under the hypothesis that Br(T → th) = 100%.…”

Section: Introductionmentioning

confidence: 99%

Search for single production of the heavy vectorlike T quark with T→th and h→<

Liu

2017

Phys. Rev. D

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The vectorlike top partners T are predicted in many extensions of the Standard Model (SM). In a simplified model including a single vectorlike T quark with charge 2/3, we investigate the process pp → T j induced by the couplings between the top partner with the first and the third generation quarks at the LHC. We find that the mixing with the first generation can enhance the production cross section. We further study the observability of the single heavy top partner through the process pp → T (→ th)j → t(→ bℓν ℓ )h(→ γγ)j at the high-luminosity (HL)-LHC (a 14 TeV pp collider with an integrated luminosity of 3 ab −1 ). For three typical heavy T quark masses m T = 600, 800 and 1000 GeV, the 3σ exclusion limits, as well as the 5σ discovery reach in the parameter plane of the two variables g * − R L , are respectively obtained at the HL-LHC.

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“…6 −2.6−0.8 ) • with a two-fold ambiguity from the B 0 d,s → J/ψf 1 (1285) decays for the first time [4]. Because there are no interferences between the flavor f n and f s states in this type of decay modes, this ambiguity is expected to be settled in the decay modes with significantly constructive or destructive interferences between those two flavor states, for example, in the B (s) → f 1 P decays [10], the B (s) → f 1 V [25] modes, and other B (s) /D (s) → f 1 M (M stands for the possible mesons) channels. However, it is worth pointing out that the D (s) → f 1 M decays cannot yet be perturbatively calculated based on the QCD theory.…”

mentioning

confidence: 99%

“…in the B 0 d,s → f 1 f 1 decays too. In fact, we have also taken this strategy into account in the studies of B → f 1 V decays [25].…”

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confidence: 99%

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$B_{d,s}^0 \to f_1 f_1$ decays with $f_1(1285)-f_1(1420)$ mixing in the perturbative QCD approach

Jiang,

Yao,

Zou

et al. 2020

Preprint

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We investigate the B 0 d,s → f1f1 decays in the framework of perturbative QCD(PQCD) approach with a referenced value φ f 1 ∼ 24 • . Here, f1 denotes the axial-vector mesons f1(1285) and f1(1420) with mixing angle φ f 1 in the quark-flavor basis. The observables such as branching ratios, direct CP violations, and polarization fractions of the B 0 s → f1f1 decays are predicted for the first time. We find that: (a) the almost pure penguin modes B 0 s → f1f1 have large branching ratios in the order of 10 −6 ∼ 10 −5 due to the Cabibbo-Kobayashi-Maskawa enhancement and generally constructive interferences between the amplitudes of B 0 s → fnfs and B 0 s → fsfs with fn and fs being the quark-flavor states of f1 mesons; (b) the observables receive important contributions from the weak annihilation diagrams in the PQCD approach. In particular, without the annihilation contributions, the B 0 s → f1(1420)f1( 1420) branching ratio will decrease about 81% and its longitudinal polarization fraction will reduce around 43%; (c) the dependence of the B 0 d,s → f1f1 decay rates on φ f 1 exhibits some interesting line-shapes, whose confirmations would be helpful to constrain the determination of φ f 1 inversely. All the PQCD predictions await for the (near) future examinations at Large Hadron Collider beauty and/or Belle-II experiments to further understand the properties of the axial-vector mesons and the perturbative dynamics released from the considered decay modes.

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Nonleptonic decays of B→(f1(1285),f1

Cited by 15 publications

References 94 publications

Phenomenological studies on neutral $B$-meson decays into $J/ψf_1$ and $η_c f_1$

Phenomenological studies on neutral $B$-meson decays into $J/ψf_1$ and $η_c f_1$

Search for single production of the heavy vectorlike T quark with T→th and h→<

$B_{d,s}^0 \to f_1 f_1$ decays with $f_1(1285)-f_1(1420)$ mixing in the perturbative QCD approach

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