Color rearrangements in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>-meson decays

Eriksson, David; Ingelman, G.; Rathsman, Johan

doi:10.1103/physrevd.79.014011

Cited by 12 publications

(4 citation statements)

References 45 publications

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“…Finally, we note that colour flows beyond LC have also been invoked in the context of J/ψ formation [79][80][81][82], and as a potential mechanism to generate diffractive topologies in ep and pp collisions [83,84].…”

Section: Introductionmentioning

confidence: 93%

String formation beyond leading colour

Christiansen

Skands

2015

J. High Energ. Phys.

260

287

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We present a new model for the hadronisation of multi-parton systems, in which colour correlations beyond leading N C are allowed to influence the formation of confining potentials (strings). The multiplet structure of SU(3) is combined with a minimisation of the string potential energy, to decide between which partons strings should form, allowing also for "baryonic" configurations (e.g., two colours can combine coherently to form an anticolour). In e + e − collisions, modifications to the leading-colour picture are small, suppressed by both colour and kinematics factors. But in pp collisions, multi-parton interactions increase the number of possible subleading connections, counteracting their naive 1/N 2 C suppression. Moreover, those that reduce the overall string lengths are kinematically favoured. The model, which we have implemented in the PYTHIA 8 generator, is capable of reaching agreement not only with the important p ⊥ (n charged ) distribution but also with measured rates (and ratios) of kaons and hyperons, in both ee and pp collisions. Nonetheless, the shape of their p ⊥ spectra remains challenging to explain.

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Section: Introductionmentioning

confidence: 93%

String formation beyond leading colour

Christiansen

Skands

2015

J. High Energ. Phys.

260

287

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“…Note that we have named the Higgses like in the general THDM, with α = β = m 12 = λ 6,7 = 0 [31]. The resulting Higgs masses are given by…”

Section: One Possible Example: the Scotogenic Modelmentioning

confidence: 99%

Confronting flavor symmetries and extended scalar sectors with lepton flavor violation bounds

2009

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We discuss the tension between discrete flavor symmetries and extended scalar sectors arising from lepton flavor violation experiments. The key point is that extended scalar sectors will generically lead to flavor changing neutral currents, which are strongly constrained by experiments. Because of the large parameter space in the scalar sector such models will, however, usually have no big problems with existing and future bounds (even though the models might be constrained). This changes considerably once a flavor symmetry is imposed in addition: Because of the symmetry, additional relations between the different couplings arise and cancellations become impossible in certain cases. The experimental bounds will then constrain the model severely and can easily exclude it. We consider two examples which show how these considerations are realized. The same logic should apply to a much wider class of models

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“…Such colour rearrangement effects were studied more systematically for B decay [5], and the sequence B → J/ψ → ℓ + ℓ − was proposed as an especially convenient test [6]. Indeed the B → J/ψ branching ratio suggests a non-negligible but not dominant fraction of the b → cW − → ccs rate, kinematical restrictions taken into account [7].…”

Section: Historical Overviewmentioning

confidence: 99%