Contribution of final-state interaction to the branching ratio of B→J/ψ
                     D

We analyzed the process of [Formula: see text] decay in quantum chromodynamics factorization (QCDF) and final state interaction (FSI). In QCDF for this decay we have only the annihilation graph and we expected small branching ratio. Then we considered FSI effect as a sizable correction where the intermediate states are [Formula: see text], K+ K–, and [Formula: see text] mesons. To consider the amplitudes of these intermediate states, the QCDF approach was used. The experimental branching ratio of [Formula: see text] is less than 2 × 10–7 and our results are 0.04 × 10–7 and 1.54 × 10–7 from QCDF and FSI, respectively.

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Analysis of the Bs → K∓∗K± decay

International Journal of Modern Physics A ◽

10.1142/s0217751x16500792 ◽

2016 ◽

Vol 31 (14n15) ◽

pp. 1650079

Author(s):

Amin Asadi ◽

Hossein Mehraban

Keyword(s):

Intermediate State ◽

Final State Interaction ◽

Branching Ratio ◽

State Interaction ◽

Experimental Result ◽

Final State ◽

Qcd Factorization ◽

State Formula

In this paper, we analyzed the process of [Formula: see text] decay within QCD factorization (QCDF) and final state interaction (FSI) effects. At first, the [Formula: see text] decay is calculated via QCDF approach. The result that is found by using the QCDF method is less than the experimental result. Then we considered FSI effect as a sizable correction where there are the intermediate state [Formula: see text] mesons via the exchange of [Formula: see text]. The experi mental branching ratio of [Formula: see text] decay is [Formula: see text], and our results by QCDF and FSI are [Formula: see text] and [Formula: see text], respectively.

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Analysis of B0 → Ds−∗K+ decay

International Journal of Modern Physics A ◽

10.1142/s0217751x1550222x ◽

2015 ◽

Vol 30 (36) ◽

pp. 1550222

Author(s):

Amin Asadi ◽

Hossein Mehraban

Keyword(s):

Vector Meson ◽

Pseudoscalar Meson ◽

Final State Interaction ◽

Branching Ratio ◽

State Interaction ◽

Final States ◽

Final State ◽

Phenomenological Parameter ◽

Qcd Factorization ◽

Intermediate States

In this paper, we analyzed the decay [Formula: see text] within QCD factorization (QCDF) and final state interaction (FSI) methods. At first, we consider the QCDF approach, where the final states are a pseudoscalar meson and vector meson. Then, we consider the FSI method where the intermediate states are [Formula: see text] and [Formula: see text] via the exchange of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] to improve the branching ratio. The above intermediate states are calculated by using the QCDF method. In the FSI effects, the results of our calculations depend on [Formula: see text] as the phenomenological parameter. The experimental branching ratio of this decay is [Formula: see text]. Our results in QCDF approach is [Formula: see text], and with [Formula: see text], the improved branching ratio is [Formula: see text].

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WEAK ANNIHILATION TOPOLOGIES AND FINAL STATE INTERACTIONS IN $B^+ \rightarrow D^+_s\phi$ DECAY

International Journal of Modern Physics A ◽

10.1142/s0217751x12500649 ◽

2012 ◽

Vol 27 (11) ◽

pp. 1250064 ◽

Cited By ~ 6

Author(s):

BEHNAM MOHAMMADI ◽

HOSSEIN MEHRABAN

Keyword(s):

Final State Interaction ◽

Absorptive Part ◽

Branching Ratio ◽

State Interaction ◽

Hadronic Decay ◽

Final State ◽

Qcd Factorization ◽

Intermediate States ◽

Final State Interactions ◽

Weak Annihilation

In this research, the hadronic decay of [Formula: see text] is analyzed by using "QCD factorization" (QCDF) method and final state interaction (FSI). First, the [Formula: see text] decay is calculated via QCDF method and only the annihilation graphs exist in that method. Then, FSI is considered to solve the [Formula: see text] decay as a sizable correction and the D+*K0, D0*K+ and [Formula: see text] via the exchange of [Formula: see text], K-(*) and [Formula: see text] mesons are chosen for the intermediate states. To estimate the intermediate states amplitudes, QCDF method is again used. These amplitudes are used in the absorptive part of the diagrams. The experimental branching ratio of [Formula: see text] decay is less than 1.9×10-6 and our results according to QCDF method and FSI effects are 0.16×10-6 and 1.86×10-6, respectively.

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Final state interaction effects in B+→Ds*+ ϕ decay

Canadian Journal of Physics ◽

10.1139/cjp-2013-0471 ◽

2014 ◽

Vol 92 (11) ◽

pp. 1400-1404

Author(s):

Hossein Mehraban ◽

Amin Asadi

Keyword(s):

Final State Interaction ◽

Branching Ratio ◽

Interaction Effects ◽

State Interaction ◽

Experimental Result ◽

Final State ◽

Qcd Factorization ◽

Intermediate States ◽

Exclusive Decay

In this article the exclusive decay of [Formula: see text] is calculated using the QCD factorization (QCDF) method and final state interaction (FSI). First, the [Formula: see text] decay is calculated via the QCDF method and only the annihilation graphs exist in that method. The result found using the QCDF method is lower than the experimental result. FSI is considered to solve the [Formula: see text] decay. For this decay, D+K0, D0K+, and [Formula: see text] via the exchange of K0, K+, and [Formula: see text] are chosen for the intermediate states and we calculate B+ → D+K0 → [Formula: see text] decay. The amplitude of B+ → D+K0 decay is calculated using the QCDF method again. The experimental branching ratio of [Formula: see text] decay is less than 1.2 × 10−5 and our results calculated using the QCDF method and FSI are (0.4 ± 0.06) × 10−7 and (0.93 ± 0.08) × 10−5, respectively.

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Final State Interaction Effects on theB+→J/ψρ+Decay

Advances in High Energy Physics ◽

10.1155/2012/203692 ◽

2012 ◽

Vol 2012 ◽

pp. 1-19 ◽

Cited By ~ 8

Author(s):

Behnam Mohammadi ◽

Hossein Mehraban

Keyword(s):

Final State Interaction ◽

Branching Ratio ◽

State Interaction ◽

Experimental Result ◽

Final State ◽

Qcd Factorization ◽

Intermediate States ◽

Quark Diagram ◽

Exclusive Decay

The exclusive decay ofB+→J/ψρ+is studied in the framework of the QCD factorization (QCDF) method and final state interaction (FSI). A directB+→J/ψρ+decay is only occurred via a tree and a penguin based on the quark diagram analysis. The result that is found by using the QCDF method is less than the experimental result, so, the role of FSI is considered. The intermediate statesD+D̅0,D+*D̅0*,D+*D̅0, andD+D̅0*via the exchange ofD-andD-*are contributed to theB+→J/ψρ+decay. The above intermediate states is calculated by using the QCDF method. In the FSI effects the results of our calculations depend on “η” as the phenomenological parameter. The range of this parameter are selected from 1 to 2. For the exchanged particlesD-andD-*, it is found that ifη=1.58~1.83is selected the numbers of the branching ratio are placed in the experimental range. The experimental branching ratio ofB+→J/ψρ+decay is(5±0.8)×10-5, and our prediction number is(1.42±0.36)×10-5in the absence of FSI effects, and it becomes(4.2~5.8)×10-5when FSI contributions are taken into account.

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Branching fractions of Bc+ decays to two vector charm mesons

International Journal of Modern Physics A ◽

10.1142/s0217751x20500931 ◽

2020 ◽

Vol 35 (19) ◽

pp. 2050093

Author(s):

Behnam Mohammadi

Keyword(s):

Strong Interaction ◽

Final State Interaction ◽

Branching Fractions ◽

Branching Ratio ◽

Form Factors ◽

State Interaction ◽

Charm Mesons ◽

Final State ◽

Phenomenological Parameter ◽

Intermediate States

In this paper the decays of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] have been investigated. The available experimental results for these decays are (in units of [Formula: see text]): [Formula: see text] By applying the theoretical value of the [Formula: see text] that span the range of [Formula: see text], the results for QCDF approach are about [Formula: see text] times smaller than experimental one. Therefore, it is decided to calculate the theoretical branching ratio by applying the final state interaction (FSI) through the [Formula: see text] (crossed and uncrossed) channels. The FSI effects are very sensitive to the changes in the phenomenological parameter [Formula: see text]. This parameter appears in the FSI form factors that increase strong interaction share. In most calculation changing two units in this parameter, makes the final result multiply in the branching ratio, therefore the decision to use FSI is not unexpected. In this study there are thirteen intermediate states for [Formula: see text] decay, fifteen intermediate states for [Formula: see text] decay and four intermediate states for [Formula: see text] and [Formula: see text] decays, in which the contribution of each one is calculated and summed in the final amplitude. Considering [Formula: see text] and fixing [Formula: see text] between four and five acceptable results have been obtained.

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