Measurement of the Direct<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>Asymmetry in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi><mml:mo>→</mml:mo><mml:mi>s</mml:mi><mml:mi>γ</mml:mi></mml:math>Decays

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doi:10.1103/physrevlett.93.021804

Cited by 118 publications

(158 citation statements)

References 14 publications

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147

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“…Since last decade, Belle, BABAR, BESIII, LHCb and other experimental data have indicated a considerable number of exotic hadronic resonances with charm or beauty, the so-called XY Z and P c particles including tetraquark states and pentaquark states [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. All of these exotic states have many unexpected properties, such as masses, decay widths and cross-sections, which are hard to be explained in the conventional quark model.…”

Section: Introductionmentioning

confidence: 99%

Doubly charmed tetraquarks in a diquark–antidiquark model

Yan

Zhong

Zhu

2018

Int. J. Mod. Phys. A

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We study the spectra of the doubly charmed tetraquark states in a diquark-antidiquark model. The doubly charmed tetraquark states form an antitriplet and a sextet configurations according to flavor SU(3) symmetry. For the tetraquark state [qq ][cc], we show the mass for both bound and excited states. The two-body decays of tetraquark states T cc [0 + ] and T cc [1 −− ] to charmed mesons have also been studied. In the end,the doubly charmed tetraquarks decays to a charmed baryon and a light baryon have been studied in the SU(3) flavor symmetry.

show abstract

Section: Introductionmentioning

confidence: 99%

Doubly charmed tetraquarks in a diquark–antidiquark model

Yan

Zhong

Zhu

2018

Int. J. Mod. Phys. A

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“…DCPV in kaon decays is really small. This is in contrast with DCPV in B → Kπ decays, measured [217,218] at strength of 10% and only 5 years after ε /ε, and just 3 years after the measurement [20,21] of indirect CPV in B 0 → J/ψK S , which is order one. CPV, including DCPV, effects in B system are large.…”

Section: ε /εmentioning

confidence: 68%

Flavor physics and CP violation

Chang

Chen

Hou

2017

Progress in Particle and Nuclear Physics

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We currently live in the age of the CKM paradigm. The 3 × 3 matrix that links (d, s, b) quarks to (u, c, t) in the charged current weak interaction, being complex and nominally with 18 parameters, can be accounted for by just 3 rotation angles and one CP violating (CPV) phase, with unitarity and the CKM phases triumphantly tested at the B factories. But the CKM picture is unsatisfactory and has too many parameters. The main aim of Flavor Physics and CP violation (FPCP) studies is the pursuit to uncover New Physics beyond the Standard Model (SM). Two highlights of LHC Run 1 period are the CPV phase φ s of B s mixing and B s → µ + µ − decay, which were found to be again consistent with SM, though the saga is yet unfinished. We also saw the emergence of the P 5 angular variable anomaly in B 0 → K * 0 µ + µ − decay and R K ( * ) anomaly in B → K ( * ) µ + µ − to B → K ( * ) e + e − rate ratios, and the BaBar anomaly in B → D ( * ) τ ν decays, which suggest possible New Physics in these flavor processes, pointing to extra Z , charged Higgs, or leptoquarks. Charmless hadronic, semileptonic, purely leptonic and radiative B decays continue to offer various further windows on New Physics. Away from B physics, the rare K → πνν decays and ε /ε in the kaon sector, µ → e transitions, muon g − 2 and electric dipole moments of the neutron and electron, τ → µγ, µµµ, eee, and a few charm physics probes, offer broadband frontier windows on New Physics. Lastly, flavor changing neutral transitions involving the top quark t and the 125 GeV Higgs boson h, such as t → ch and h → µτ , offer a new window into FPCP, while a new Z related or inspired by the P 5 anomaly, could show up in analogous top quark processes, perhaps even link with low energy phenomena such as muon g − 2 or rare kaon processes. In particular, we advocate the potential new SM, the two Higgs doublet model without discrete symmetries to control flavor violation, as SM2. As we are close to the alignment limit with h rather SM-like, flavor changing neutral Higgs couplings (FCNH) are suppressed by a small mixing angle, but the exotic Higgs doublet possesses FCNH couplings, which we are just starting to probe. As LHC Run 2 runs its course, and with Belle II B physics program to start soon, there is much to look forward to in the flavor and CPV sector. *

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“…A mass was found to be very close to the D 0 D * 0 threshold and width less than 2.3 MeV. The state was confirmed in B-decays by the BaBar experiment [11] and in pp production by the Tevatron experiments CDF [12] and DØ [13]. From the angular analysis performed by several collaborations it was shown that the X(3872) state has the quantum number J PC = 1 ++ .…”

Section: Dynamical Picture For Multiquark States: Covariant Confined mentioning

confidence: 78%

Dynamical picture for the exotic XYZ states

Ivanov

2018

EPJ Web Conf.

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We present a dynamical approach for description of the multi-quark states that is based on an effective interaction Lagrangian describing the coupling of hadrons to their constituent quarks. First, we explore the consequences of treating the X(3872) meson as a tetraquark bound state. We calculate the decay widths of the observed channels and conclude that for reasonable values of the size parameter of the X(3872) one finds consistency with the available experimental data. Then we have critically checked the tetraquark picture for the Z c (3900) state by analyzing its strong decays. We found that Z c (3900) has a much more stronger coupling to DD * than to J/ψπ that is in discord with experiment. As an alternative we have employed a molecular-type four-quark current to describe the decays of the Z c (3900) state as the charged particle in the isotriplet. We found that a molecular-type current gives the values of the above decays in accordance with the experimental observation. By using moleculartype four-quark currents for the recently observed resonances Z b (10610) and Z b (10650), we have calculated their two-body decay rates into a bottomonium state plus a light meson as well as into B-meson pairs. *

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Measurement of the DirectCPAsymmetry inb→sγDecays

Cited by 118 publications

References 14 publications

Doubly charmed tetraquarks in a diquark–antidiquark model

Doubly charmed tetraquarks in a diquark–antidiquark model

Flavor physics and CP violation

Dynamical picture for the exotic XYZ states

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