Rare decay processes K→πvv^- and KL→π^0vv^- are considered in the framework of three-site Higgsless model. The contributions of this new physics model to these two decay processes come from the new heavy gauge bos...Rare decay processes K→πvv^- and KL→π^0vv^- are considered in the framework of three-site Higgsless model. The contributions of this new physics model to these two decay processes come from the new heavy gauge bosons and the correction terms for the couplings of the ordinary gauge bosons with fermions. Our numerical results show that the branching ratios of these two decay processes can be enhanced by 40% and 50% relative to those predicted by the standard model.展开更多
Group theory(GT) provides a rigorous framework for studying symmetries in various disciplines in physics ranging from quantum field theories and the standard model to fluid mechanics and chaos theory. To date, the app...Group theory(GT) provides a rigorous framework for studying symmetries in various disciplines in physics ranging from quantum field theories and the standard model to fluid mechanics and chaos theory. To date, the application of such a powerful tool in optical physics remains limited. Over the past few years however, several quantum-inspired symmetry principles(such as parity-time invariance and supersymmetry) have been introduced in optics and photonics for the first time. Despite the intense activities in these new research directions, only few works utilized the power of group theory. Motivated by this status quo, here we present a brief overview of the application of GT in optics, deliberately choosing examples that illustrate the power of this tool in both continuous and discrete setups. We hope that this review will stimulate further research that exploits the full potential of GT for investigating various symmetry paradigms in optics, eventually leading to new photonic devices.展开更多
Using the form factors calculated in the three-point QCD sum rules, we calculate the new physics contri- butions to the physical observables of Bc→D;μ＋ μ- decay in a family non-universal Z＇ model. Under the consi...Using the form factors calculated in the three-point QCD sum rules, we calculate the new physics contri- butions to the physical observables of Bc→D;μ＋ μ- decay in a family non-universal Z＇ model. Under the consideration of three cases of the new physics parameters, we find that： （a） the Z＇ boson can provide large contributions to the differential decay rates; （b） the forward-backward asymmetry （FBA） can be increased by about 47%, 38%, and 110% at most in S1, S2, and extreme limR values （ELV）, respectively. In addition, the zero crossing can be shifted in all the cases; （c） when s 〉 0.08, the value Of PL can be changed from -1 in the Standard Model （SM） to -0.5 in S1, -0.6 in S2, and 0 in extreme limit values, respectively; （d） the new physics corrections to PT will decrease the SM prediction about 25% for the cases of S1 and S2, 100% for the case of ELV.展开更多
基金supported in part by the National Natural Science Foundation of China under Grant No.10675057Foundation of Liaoning Education Committee under Grant No.2007T086
文摘Rare decay processes K→πvv^- and KL→π^0vv^- are considered in the framework of three-site Higgsless model. The contributions of this new physics model to these two decay processes come from the new heavy gauge bosons and the correction terms for the couplings of the ordinary gauge bosons with fermions. Our numerical results show that the branching ratios of these two decay processes can be enhanced by 40% and 50% relative to those predicted by the standard model.
基金support from the Photonics and Mathematical Optics Group at Tecnologico de Monterrey and Consorcio enóptica Aplicada through CONACYT FORDECYT#290259 project grantsupport from Henes Center for Quantum Phenomena,Michigan Technological Universitysupport from Spanish MINECO projects FIS2014-57387-C3-3P and DPI2013-47100-C2-1-P
文摘Group theory(GT) provides a rigorous framework for studying symmetries in various disciplines in physics ranging from quantum field theories and the standard model to fluid mechanics and chaos theory. To date, the application of such a powerful tool in optical physics remains limited. Over the past few years however, several quantum-inspired symmetry principles(such as parity-time invariance and supersymmetry) have been introduced in optics and photonics for the first time. Despite the intense activities in these new research directions, only few works utilized the power of group theory. Motivated by this status quo, here we present a brief overview of the application of GT in optics, deliberately choosing examples that illustrate the power of this tool in both continuous and discrete setups. We hope that this review will stimulate further research that exploits the full potential of GT for investigating various symmetry paradigms in optics, eventually leading to new photonic devices.
基金Supported by the National Natural Science Foundation of China under Grant Nos. 10947020 and 11147004Natural Science Foundation of Henan Province under Grant No. 112300410188
文摘Using the form factors calculated in the three-point QCD sum rules, we calculate the new physics contri- butions to the physical observables of Bc→D;μ＋ μ- decay in a family non-universal Z＇ model. Under the consideration of three cases of the new physics parameters, we find that： （a） the Z＇ boson can provide large contributions to the differential decay rates; （b） the forward-backward asymmetry （FBA） can be increased by about 47%, 38%, and 110% at most in S1, S2, and extreme limR values （ELV）, respectively. In addition, the zero crossing can be shifted in all the cases; （c） when s 〉 0.08, the value Of PL can be changed from -1 in the Standard Model （SM） to -0.5 in S1, -0.6 in S2, and 0 in extreme limit values, respectively; （d） the new physics corrections to PT will decrease the SM prediction about 25% for the cases of S1 and S2, 100% for the case of ELV.
