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Chinese Physics C 2009年第9期33卷 764-768页

作者：张进娟许昌任中洲 Department of Physics Nanjing University Department of Physics Nanjing University Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou

We present a systematic calculation on the α-decay branching ratios to excited-states of an even-even α-decay chain ^242Cm → ^238Pu → ^234U → ^230Th → ^226Rn by the improved barrier penetration approach. The changes of the parities between the parent nuclei and the daughter nuclei are properly taken into account. The theoretical values are compared with the available experimental data and the deviation between them is within a factor of 5 in most cases.

关键词： alpha-decay branching ratios high-lying excited states parity

Investigation of decay modes of superheavy nuclei

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Nuclear Science and Techniques 2021年第11期32卷 146-162页

作者： H.C.Manjunatha N.Sowmya P.S.Damodara Gupta K.N.Sridhar A.M.Nagaraja L.Seenappa S.Alfred Cecil Raj Department of Physics Government College for WomenKolarKarnataka 563101India Department of Physics Government First Grade CollegeKolarKarnataka 563101India Department of Physics St.Joseph’s CollegeAffiliated to Bharathidasan UniversityTiruchirappalliTamil NaduIndia

A detailed investigation of different decay modes,namely alpha decay,beta decay,cluster decay including heavy particle emission(Z_(c)>28),and spontaneous fission,was carried out,leading to the identification of new cluster and beta-plus emitters in superheavy nucle with 104≤Z≤*** the first time,we identified around20 beta-plus emitters in superheavy ***-particle radioactivity was observed in superheavy elements of atomic number in the range 116≤Z≤126.^(292-293)Og were identified as ^(86)Kr emitters,and ^(298)122 and ^(300)122 were identified as ^(94)Zr emitters,whereas heavy-particle radioactivity from ^(91)Y was also observed in ^(299)***,the nuclei ^(300)124 and ^(306)126 exhibit ^(96)Mo *** reported regions of beta-plus and heavyparticle radioactivity for superheavy nuclei are stronger than those for alpha *** identified decay modes for superheavy nuclei are presented in a *** study is intended to serve as a reference for identifying possible decay modes in the superheavy region.

关键词： Alpha decay Beta decay Heavy-particle radioactivity branching ratios

Study of semileptonic decays B_s →D_(s1)(2536)l and B_s →D_(s2)(2573)l in the CQM model

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Chinese Physics C 2008年第8期32卷 603-607页

作者：赵树民张印杰阎玉立刘立全武利平 College of Physics Science and Technology Hebei University

Based on the assumption that Ds1（2536） and Ds2（2573） belong to T doublet （1^＋,2^＋）, we calculate the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） in terms of the Constituent Quark Meson （CQM） model. For Bs → Ds1 （2536）＋ lv^- and B→ → Ds2 （2573）＋lv^-, the order of magnitude of the obtained branching ratios is 10^-3. Our numerical results of the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） are large, which implies that two semileptonic decays should be seen in future experiments.

关键词： semileptonic decay CQM model branching ratios

Top rare decays t→cV in mirror twin Higgs models

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Chinese Physics C 2021年第1期45卷 82-88页

作者：别素雅柳国丽王雯宇 School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China School of Physics Beijing University of TechnologyBeijing 100124China

The decay t→cV(V=γ,Z,g)processes in mirror twin Higgs models with colorless top partners are studied in this *** report that the branchi ng ratios of these decays can strongly affect the standard model expectations in some parameter spaces and may be detectable according to the current precision electroweak ***,constraints on the model parameters may be obtained from the branching fraction of the decay processes,which may serve as a robust detection tool for this new physics model.

关键词： mirror twin Higgs models t→cV branching ratios

Pure annihilation decays of B^(s)_(0)→a^(+)_(0)a^(−)_(0)and B^(0)_(d)→K^(∗+)_(0)K^(∗−)_(0)in the PQCD approac

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Communications in Theoretical Physics 2021年第4期73卷 82-91页

作者：陈禹同蒋泽文刘新 Department of Physics Jiangsu Normal UniversityXuzhou 221116China

We study the CP-averaged branching fractions and the CP-violating asymmetries in the pure annihilation decays of B^(s)_(0)→a^(+)_(0)a^(−)_(0)and B^(0)_(d)→K^(∗+)_(0)K^(∗−)_(0),where a_(0)[K^(∗)_(0)]denotes the scalar a_(0)(980)and a_(0)(1450)[K^(∗)_(0)(800)(orκ)and K^(∗)_(0)(1430)],with the perturbative QCD factorization approach under the assumption of two-quark structure for the a_(0)and K^(∗)_(0)*** numerical results show that the branching ratios of the B^(0)_(d)→K^(∗+)_(0)K^(∗−)_(0)decays are in the order of 10^(−6),while the decay rates of the B^(s)_(0)→a^(+)_(0)a^(−)_(0)modes are in the order of 10−*** light of the measured modes with the same quark components in the pseudoscalar sector,namely,B^(0)_(d)→K^(+)k_(-)and B^(0)_(s)→π^(+)π_(−),the predictions for the considered decay modes in this work are expected to be measured at the Large Hadron Collider beauty and/or Belle-Ⅱexperiments in the(near)***,it is of great interest to find that the twist-3 distribution amplitudesφ^(S)andφ^(T)with inclusion of the Gegenbauer polynomials for the scalar a_(0)(1450)and K^(∗)_(0)(1430)states in scenario 2 contribute slightly to the branching ratios while significantly to the CP violations in the B^(0)_(d)→K^(∗)_(0)(1430)+K^(∗)_(0)(1430)−and B^(0)_(s)→a_(0)(1450)+a_(0)(1450)−decays,which indicates that,compared to the asymptoticφ^(S)andφ^(T),these Gegenbauer polynomials could change the strong phases evidently in these pure annihilation decay *** predictions await for the future confirmation experimentally,which could further provide useful information to help explore the inner structure of the scalars and shed light on the annihilation decay mechanism.

关键词： B meson decays perturbative QCD factorization approach light scalar mesons branching ratios CP-violating asymmetries