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Articoli di riviste sul tema "B-meson physics"

Autore: Grafiati

Pubblicato: 5 ottobre 2024

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1

BORISSOV, GUENNADI. "B-PHYSICS RESULTS FROM TEVATRON". International Journal of Modern Physics A 28, n. 08 (21 marzo 2013): 1330007. http://dx.doi.org/10.1142/s0217751x1330007x.

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This review summarizes the most important results in B-physics obtained at the Tevatron. They include the discovery of the new B-hadrons, the measurement of their masses and lifetimes, the measurement of the oscillation frequency of [Formula: see text] meson, the search for its rare decay [Formula: see text] and the study of the CP asymmetry in decays and mixing of B mesons.

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2

CLINE, DAVID B. "B MESON FACTORIES". Modern Physics Letters A 04, n. 26 (10 dicembre 1989): 2589–93. http://dx.doi.org/10.1142/s0217732389002896.

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Particle physics makes progress in three Frontiers: (1) High Energy Frontier, (2) High Intensity Frontier, and (3) High Precision Frontier. Category (1) will be dominated by the SSC and LHC experiments in the next decade and (3) by precise measurements of the (g−2)μ and sin2θw. In category (2) there will be a new round of intense “factories” constructed for rare K decays, [τ charm] studies, ϕ Factories and B Factories. Each of these Factories provide new physics possibilities as illustrated in Table 1. Note that the High Intensity Frontier is sometimes the same as the High Precision Frontier since high statistics are usually needed for high precision. In this brief note we describe some of the current possibilities for B Meson Factories.

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3

Jönsson, Leif. "B meson physics with ARGUS". Nuclear Physics B - Proceedings Supplements 1, n. 2 (marzo 1988): 81–90. http://dx.doi.org/10.1016/0920-5632(88)90324-6.

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4

Wegener, D. "Present status of B-meson physics". Nuclear Physics B - Proceedings Supplements 7, n. 1 (aprile 1989): 337–57. http://dx.doi.org/10.1016/0920-5632(89)90577-x.

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5

KRAMER, GUSTAV, e CAI-DIAN LÜ. "NONLEPTONIC DECAYS OF B MESONS AND STRONG COUPLING CONSTANTS". International Journal of Modern Physics A 13, n. 19 (30 luglio 1998): 3361–84. http://dx.doi.org/10.1142/s0217751x98001669.

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Nonleptonic decays of B mesons into two mesons or meson resonances are studied on the basis of two versions of simple pole dominance models involving scalar, vector, pseudoscalar and axial vector poles. The results are compared with those obtained from the usual factorization model and are used to obtain information on strong coupling constants between the B meson and one light or one charmed meson, respectively. These coupling constants are compared to results from various QCD sum rule calculations.

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6

MILLER, DAVID H. "RECENT RESULTS IN B PHYSICS". Modern Physics Letters A 05, n. 32 (30 dicembre 1990): 2683–91. http://dx.doi.org/10.1142/s0217732390003139.

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7

Wyler, Daniel. "B-meson physics and the standard model". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 446, n. 1-2 (maggio 2000): 373–83. http://dx.doi.org/10.1016/s0168-9002(00)00052-8.

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8

Kundu, Anirban. "New physics effects from B meson decays". Pramana 55, n. 1-2 (luglio 2000): 265–70. http://dx.doi.org/10.1007/s12043-000-0104-3.

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9

NAM, SOO-HYEON. "QED CORRECTIONS TO ISOSPIN-RELATED DECAY RATES OF CHARGED AND NEUTRAL B MESONS". Modern Physics Letters A 20, n. 02 (20 gennaio 2005): 95–101. http://dx.doi.org/10.1142/s0217732305016361.

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We estimate the isospin-violating QED radiative corrections to the charged-to-neutral ratios of the decay rates for B+ and B0 in non-leptonic B meson decays. In particular, these corrections are potentially important for precision measurement of the charged-to-neutral production ratio of B meson in e+e- annihilation. We calculate explicitly the QED corrections to the ratios of two different types of decay rates Γ(B+→J/ψK+)/Γ(B0→J/ψK0) and [Formula: see text] taking into account the form factors of the mesons based on the vector meson dominance model, and compare them with the results obtained for the point-like mesons.

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10

Golutvin, A. I., Mikhail V. Danilov e Yu M. Zaitsev. "B-Meson oscillations". Uspekhi Fizicheskih Nauk 157, n. 3 (1989): 369. http://dx.doi.org/10.3367/ufnr.0157.198903a.0369.

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11

SEGOVIA, J., D. R. ENTEM, F. FERNANDEZ e E. HERNANDEZ. "CONSTITUENT QUARK MODEL DESCRIPTION OF CHARMONIUM PHENOMENOLOGY". International Journal of Modern Physics E 22, n. 10 (ottobre 2013): 1330026. http://dx.doi.org/10.1142/s0218301313300269.

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We review how quark models are able to describe the phenomenology of the charm meson sector. The spectroscopy and decays of charmonium and open charm mesons are described in a particular quark model and compared with the data and the results of other existing models in the literature. A quite reasonable global description of the heavy meson spectra is reached. A new assignment of the ψ(4415) resonance as a 3D state leaving aside the 4S state to the X(4360) is tested through the analysis of the resonance structure in e+e- exclusive reactions around the ψ(4415) energy region. We make tentative assignments of some of the XYZ mesons. To elucidate the structure of the 1+cs states, i.e., Ds1(2460) and Ds1(2536), we study the strong decay properties of the Ds1(2536) meson. We also perform a calculation of the branching fractions for the semileptonic decays of B and Bs mesons into final states containing orbitally excited charmed and charmed-strange mesons, which have become a very important source of information about the structure of heavy mesons. Analysis of the nonleptonic B-meson decays into D(*)DsJ are also included.

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12

KATOCH, A. C., e R. C. VERMA. "WEAK DECAYS OF B−, $\bar{B}^0$ MESONS TO A PSEUDOSCALAR AND A SCALAR MESON IN THE FINAL STATE". International Journal of Modern Physics A 11, n. 01 (10 gennaio 1996): 129–39. http://dx.doi.org/10.1142/s0217751x96000067.

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Using the factorization scheme, we study two-body exclusive weak decays of B– and [Formula: see text] mesons to a pseudoscalar meson and a scalar meson in the final state. Employing the Isgur-Scora-Grinstein-Wise quark model to obtain the form factors involved in the decay matrix elements, we calculate the branching ratios for the decays involving b→c transition.

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13

HOU, WEI-SHU. "B′ MIXING AND THE PSEUDOSCALAR DECAY CONSTANT". International Journal of Modern Physics A 05, n. 17 (10 settembre 1990): 3335–46. http://dx.doi.org/10.1142/s0217751x9000146x.

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The possibilities of B′ meson mixing is discussed. It is found that if fB′ is not much smaller than fπ, B's (or B'd) mixing is possible if |Vt′s Vt′b′/Vcb′| is large, but only for not too heavy b′ masses, e.g. below LEP I energies. The B'b meson will have large mixing for a broad range of parameters; however, it is hard to produce. The vector mesons (B′*) may exhibit mixing phenomena as well. A discussion of our present understanding of meson decay constants of a heavy-light system [Formula: see text] is given. Further efforts on this problem is needed, which will have an impact on our understanding of B mixing as well.

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14

CHOUDHURY, S. RAI, A. S. CORNELL, NAVEEN GAUR e G. C. JOSHI. "SIGNATURES OF NEW PHYSICS IN DILEPTONIC B-DECAYS". International Journal of Modern Physics A 21, n. 12 (10 maggio 2006): 2617–34. http://dx.doi.org/10.1142/s0217751x06029491.

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Leptonic decays of B-mesons are theoretically very clean probes for testing the Standard Model (SM) and possible physics beyond it. Amongst the various leptonic decays of the B-meson, the pure dileptonic decay B → ℓ+ ℓ- is very important, as this mode is helicity suppressed in the SM but can be substantially enhanced in some of the models beyond the SM, such as supersymmetric (SUSY) theories and the two Higgs doublet model (2HDM). Although the purely dileptonic decay mode is helicity suppressed in the SM its associated mode B → ℓ+ ℓ-γ does not have the same suppression, due to the presence of γ in the final state. In this paper we will also analyze the effects of enhanced Z-penguins on these two decay modes.

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15

Gabrielli, Emidio, e Luca Marzola. "Entanglement and Bell Inequality Violation in B → ϕϕ Decays". Symmetry 16, n. 8 (13 agosto 2024): 1036. http://dx.doi.org/10.3390/sym16081036.

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The decays of the B meson into vector mesons, observed during the LHCb experiment, provide an ideal laboratory to investigate particle physics phenomena with quantum information theory methods. In this article, we focus on the decays yielding a pair of ϕ mesons to investigate the presence of entanglement in the spin correlations of the system and quantify the amount of Bell inequality violation it entails. Our results show that the present LHCb data allow access to entanglement and to the Bell inequality violation with a significance exceeding the 5σ threshold in both the cases. This demonstrates that the strong and electroweak interactions responsible for the B meson decay act as a source of entanglement and the quantum mechanics nature of high-energy phenomena. Particular attention is paid to the assessment of loopholes: deficiencies in the experimental setup which could invalidate the results of the Bell test.

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16

NEUBERT, MATTHIAS. "B DECAYS AND CP VIOLATION". International Journal of Modern Physics A 11, n. 23 (20 settembre 1996): 4173–239. http://dx.doi.org/10.1142/s0217751x96001966.

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17

ALI, AHMED. "REVIEW OF HEAVY QUARK PHYSICS – THEORY". International Journal of Modern Physics A 20, n. 22 (10 settembre 2005): 5080–94. http://dx.doi.org/10.1142/s0217751x05028600.

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18

Irion, R. "HIGH-ENERGY PHYSICS: B-Meson Factories Make a". Science 291, n. 5508 (23 febbraio 2001): 1471. http://dx.doi.org/10.1126/science.291.5508.1471.

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19

SKWARNICKI, TOMASZ. "B Meson Physics with the Crystal Ball Detector". Annals of the New York Academy of Sciences 535, n. 1 International (luglio 1988): 303–8. http://dx.doi.org/10.1111/j.1749-6632.1988.tb51518.x.

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20

Narodetskii, I. M. "B-meson physics: CP violation and semileptonic decays". Physics of Atomic Nuclei 66, n. 11 (novembre 2003): 1972–88. http://dx.doi.org/10.1134/1.1625741.

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21

Egorychev, V. Yu, e I. M. Belyaev. "B c -meson physics in the LHCb experiment". Physics of Atomic Nuclei 78, n. 8 (novembre 2015): 968–72. http://dx.doi.org/10.1134/s1063778815080049.

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22

Gelzer, Zechariah, C. Bernard, C. De Tar, AX El-Khadra, E. Gámiz, Steven Gottlieb, Andreas S. Kronfeld et al. "Semileptonic B-meson decays to light pseudoscalar mesons on the HISQ ensembles". EPJ Web of Conferences 175 (2018): 13024. http://dx.doi.org/10.1051/epjconf/201817513024.

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We report the status of an ongoing lattice-QCD calculation of form factors for exclusive semileptonic decays of B mesons with both charged currents (B → πlv, Bs → Klv) and neutral currents (B → πl+l-, B → Kl+l-). The results are important for constraining or revealing physics beyond the Standard Model. This work uses MILC’s (2+1 + 1)-flavor ensembles with the HISQ action for the sea and light valence quarks and the clover action in the Fermilab interpretation for the b quark. Simulations are carried out at three lattice spacings down to 0.088 fm, with both physical and unphysical sea-quark masses. We present preliminary results for correlation-function fits.

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23

Wang, M. Z. "Baryonic B Meson Decays". Nuclear Physics B - Proceedings Supplements 167 (maggio 2007): 182–85. http://dx.doi.org/10.1016/j.nuclphysbps.2006.12.052.

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24

Huang, Xiaotao, Yu-Kuo Hsiao, Jike Wang e Liang Sun. "Baryonic B Meson Decays". Advances in High Energy Physics 2022 (11 marzo 2022): 1–9. http://dx.doi.org/10.1155/2022/4343824.

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We review the two- and three-body baryonic B decays with the dibaryon ( B B ′ ¯ ) as the final states. Accordingly, we summarize the experimental data of the branching fractions, angular asymmetries, and CP asymmetries. Using the W -boson annihilation (exchange) mechanism, the branching fractions of B ⟶ B B ′ ¯ are shown to be interpretable. In the approach of perturbative QCD counting rules, we study the three-body decay channels. In particular, we review the CP asymmetries of B ⟶ B B ′ ¯ M , which are promising to be measured by the LHCb and Belle II experiments. Finally, we remark the theoretical challenges in interpreting B B − ⟶ p p ¯ ρ − and B B − ⟶ p p ¯ μ − ν ¯ μ .

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25

GROZIN, ANDREY. "B-MESON DISTRIBUTION AMPLITUDES". International Journal of Modern Physics A 20, n. 32 (30 dicembre 2005): 7451–84. http://dx.doi.org/10.1142/s0217751x05028570.

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Abstract (sommario):

B-meson light-cone distribution amplitudes are discussed in these lectures in the framework of HQET. The evolution equation for the leading-twist distribution amplitude is derived in one-loop approximation. QCD sum rules for distribution amplitudes are discussed.

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26

Eichten, Estia, G. Hockney e H. B. Thacker. "Application of heavy-light methods to B meson physics". Nuclear Physics B - Proceedings Supplements 17 (settembre 1990): 529–32. http://dx.doi.org/10.1016/0920-5632(90)90307-g.

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27

GARMASH, ALEXEI. "CP Violation in b → s Decays and New Physics Phases". International Journal of Modern Physics A 20, n. 15 (20 giugno 2005): 3527–30. http://dx.doi.org/10.1142/s0217751x05026893.

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We present new measurements of CP-violation parameters in B0 → ϕK0, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text] decays based on a sample of [Formula: see text] pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the decay modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. All results are preliminary.

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28

WU, Y. L., M. ZHONG e Y. B. ZUO. "B(s), D(s)→ π, K, η, ρ, K*, ω, ϕ TRANSITION FORM FACTORS AND DECAY RATES WITH EXTRACTION OF THE CKM PARAMETERS |Vub|, |Vcs|, |Vcd|". International Journal of Modern Physics A 21, n. 30 (10 dicembre 2006): 6125–72. http://dx.doi.org/10.1142/s0217751x06033209.

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A systematic calculation for the transition form factors of heavy to light mesons (B, Bs, D, Ds→ π, K, η, ρ, K*, ω, ϕ) is carried out by using light-cone sum rules in the framework of heavy quark effective field theory. The heavy quark symmetry at the leading order of 1/mQexpansion enables us to reduce the independent wave functions and establish interesting relations among form factors. Some relations hold for the whole region of momentum transfer. The meson distribution amplitudes up to twist-4 including the contributions from higher conformal spin partial waves and light meson mass corrections are considered. The CKM matrix elements |Vub|, |Vcs| and |Vcd| are extracted from some relatively well-measured decay channels. A detailed prediction for the branching ratios of heavy to light meson decays is then presented. The resulting predictions for the semileptonic and radiative decay rates of heavy to light mesons (B, Bs, D, Ds→ π, K, η, ρ, K*, ω, ϕ) are found to be compatible with the current experimental data and can be tested by more precise experiments at B-factory, LHCb, BEPCII and CLEOc.

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29

Deshpande, N. G. "Penguin decays of B meson". Pramana 41, S1 (luglio 1993): 249–59. http://dx.doi.org/10.1007/bf02908087.

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30

Tarantino, Cecilia. "B-meson mixing and lifetimes". Nuclear Physics B - Proceedings Supplements 156, n. 1 (giugno 2006): 33–37. http://dx.doi.org/10.1016/j.nuclphysbps.2006.02.119.

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31

Stone, Sheldon. "Charmed semileptonic B meson decays". Nuclear Physics B - Proceedings Supplements 13 (febbraio 1990): 261–69. http://dx.doi.org/10.1016/0920-5632(90)90068-6.

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32

Fu, Hui-Feng, Guo-Li Wang, Zhi-Hui Wang e Xiang-Jun Chen. "Semi-Leptonic and Non-Leptonic B Meson Decays to Charmed Mesons". Chinese Physics Letters 28, n. 12 (dicembre 2011): 121301. http://dx.doi.org/10.1088/0256-307x/28/12/121301.

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33

FLEISCHER, R. "THE B → ππ, πK PUZZLES: IMPLICATIONS FOR HADRON PHYSICS, NEW PHYSICS AND RARE DECAYS". International Journal of Modern Physics A 21, n. 04 (10 febbraio 2006): 664–71. http://dx.doi.org/10.1142/s0217751x06031867.

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Abstract (sommario):

The B-meson system is an interesting probe for the exploration of strong interactions, the quark-flavour sector of the Standard Model, and the search for new physics. In this programme, non-leptonic B decays, which are particularly challenging from the point of view of QCD, play a key rôle. After discussing strategies to deal with the corresponding hadronic matrix elements of four-quark operators and popular avenues for new physics to manifest itself in B decays, we focus on puzzling patterns in the B-factory data for B → ππ, πK decays; we explore their implications for hadron physics, new physics and rare K and B decays.

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34

NAKAO, M. "RADIATIVE AND ELECTROWEAK RARE B DECAYS". International Journal of Modern Physics A 19, n. 06 (10 marzo 2004): 934–48. http://dx.doi.org/10.1142/s0217751x04018889.

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This report summarizes the latest experimental results on radiative and electroweak rare B meson decays. These rare decay processes proceed through the Flavor-Changing-Neutral-Current processes, and thus are sensitive to the postulated new particles in the theories beyond the Standard Model. Experiments at e+e- colliders, Belle, BaBar and CLEO, have been playing the dominant role, while the CDF and D0 experiments have just started to provide new results from Tevatron Run-II. The most significant achievement is the first observation of the decay B→K*ℓ+ℓ-, which opens a new window to search for new physics in B meson decays.

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35

STONE, SHELDON. "SEARCH FOR CP VIOLATION VIA $e^ + e^ - \to B^0 \bar B^0 \gamma $". Modern Physics Letters A 03, n. 05 (aprile 1988): 541–46. http://dx.doi.org/10.1142/s0217732388000659.

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I propose an experiment to measure CP violation in B0 meson decays by collecting B mesons via [Formula: see text] and looking for a difference between final states with a positive lepton and a CP eigenstate and those with a negative lepton and a CP eigenstate. It is predicted that ~107 events would be sufficient.

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36

Gibbons, L., e K. Honscheid. "B Meson Production and Decay,b-flavored hadrons". European Physical Journal C 15, n. 1-4 (1 gennaio 2000): 581–617. http://dx.doi.org/10.1007/bf02683462.

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37

Ladisa, M., G. Nardulli e P. Santorelli. "Semileptonic and rare B meson decays into a light pseudoscalar meson". Physics Letters B 455, n. 1-4 (maggio 1999): 283–90. http://dx.doi.org/10.1016/s0370-2693(99)00386-x.

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38

Seeman, John T. "High-Luminosity B Factory e+e− Colliders". Annual Review of Nuclear and Particle Science 74, n. 1 (26 settembre 2024): 613–48. http://dx.doi.org/10.1146/annurev-nucl-113021-055740.

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Three double-ring B factories—PEP-II, KEKB, and SuperKEKB—were built with asymmetric beam energies to produce high luminosity at the Υ(4S) resonance producing copious B mesons and associated particle physics data, delivered to their respective particle physics detectors, BaBar, Belle, and Belle II. In PEP-II and KEKB, the primary goal was achieved to make the first measurements of charge parity (CP) violation in decays in the B meson system. PEP-II and KEKB have finished beam operations, but particle data analysis continues. SuperKEKB is extending those measurements. The beam operation of SuperKEKB with Belle II has recently started. These three accelerators have pushed the state of the art of accelerators of two-ring colliders, including small beam emittances, small interaction point beam sizes, large stored beam currents, crab cavities, top-up injection with the detectors on, bunch-by-bunch feedbacks, crab waist operation, high beam–beam parameters, high peak luminosity, and high integrated luminosity.

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NEUBERT, MATTHIAS. "THEORY OF CP VIOLATION IN THE B-MESON SYSTEM". International Journal of Modern Physics A 17, n. 22 (10 settembre 2002): 2936–50. http://dx.doi.org/10.1142/s0217751x0201251x.

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Recent developments in the theory of CP violation in the B-meson system are reviewed, with focus on the determination of sin 2β from B → J/ψ K decays, its implications for tests of the Standard Model and searches for New Physics, and the determination of γ and α from charmless hadronic B decays.

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40

Guo, Xin-heng, e Tao Huang. "Pseudo-Scalar Meson Wavefunctions and Exclusive Decays of D and B Mesons". Communications in Theoretical Physics 13, n. 3 (aprile 1990): 365–82. http://dx.doi.org/10.1088/0253-6102/13/3/365.

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41

Gronau, Michael. "CP Violation in B Meson Decays". Nuclear Physics B - Proceedings Supplements 142 (maggio 2005): 263–70. http://dx.doi.org/10.1016/j.nuclphysbps.2005.01.047.

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42

Golubev, Vladimir B. "B-meson semileptonic decays at BaBar". Nuclear Physics B - Proceedings Supplements 156, n. 1 (giugno 2006): 178–81. http://dx.doi.org/10.1016/j.nuclphysbps.2006.02.131.

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43

Rescigno, Marco. "B meson mixing at CDF II". Nuclear Physics B - Proceedings Supplements 156, n. 1 (giugno 2006): 43–47. http://dx.doi.org/10.1016/j.nuclphysbps.2006.02.143.

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44

Gardner, S. "Intrinsic charm in B-meson decays". Nuclear Physics B - Proceedings Supplements 115 (febbraio 2003): 61–66. http://dx.doi.org/10.1016/s0920-5632(02)01954-0.

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45

Schubert, K. R. "CP violation in B-meson decays". European Physical Journal A 18, n. 2-3 (novembre 2003): 147–53. http://dx.doi.org/10.1140/epja/i2002-10290-6.

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46

Guazzini, Damiano, Rainer Sommer e Nazario Tantalo. "Precision for B-meson matrix elements". Journal of High Energy Physics 2008, n. 01 (31 gennaio 2008): 076. http://dx.doi.org/10.1088/1126-6708/2008/01/076.

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47

Ali Khan, A., T. Bhattacharya, S. Collins, C. T. H. Davies, R. Gupta, C. Morningstar, J. Shigemitsu e J. Sloan. "B meson decay constants from NRQCD". Physics Letters B 427, n. 1-2 (maggio 1998): 132–40. http://dx.doi.org/10.1016/s0370-2693(98)00323-2.

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48

Noguchi, S. "CP violation in B meson decays". Nuclear Physics A 721 (giugno 2003): C151—C160. http://dx.doi.org/10.1016/s0375-9474(03)01028-5.

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49

Albrecht, Johannes, Stefanie Reichert e Danny van Dyk. "Status of rare exclusive B meson decays in 2018". International Journal of Modern Physics A 33, n. 18n19 (9 luglio 2018): 1830016. http://dx.doi.org/10.1142/s0217751x18300168.

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Abstract (sommario):

This review discusses the present experimental and theoretical status of rare flavor-changing neutral current b-quark decays at the beginning of 2018. It includes a discussion of the experimental situation and details of the currently observed anomalies in measurements of flavor observables, including lepton flavor universality. Progress on the theory side within and beyond the Standard Model theory is also discussed, together with potential New Physics interpretations of the present measurements.

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50

Dubnička, Stanislav, Anna Z. Dubničková, Mikhail A. Ivanov e Andrej Liptaj. "B Meson Decays in the Covariant Confined Quark Model". Symmetry 15, n. 8 (4 agosto 2023): 1542. http://dx.doi.org/10.3390/sym15081542.

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Abstract (sommario):

The aim of this text is to present the covariant confined quark model (CCQM) and review its applications in the decays of B mesons. We do so in the context of existing experimental measurements and theoretical results of other authors, which we also review. The physics principles are, in detail, exposed for the CCQM; the other results (theoretical and experimental) are surveyed in an enumerative way with comments. We proceed by considering, successively, three categories of decay processes: leptonic, semileptonic and non-leptonic.

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