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ABSTRACT: The most common sites of breast cancer metastasis are the bone, lung, liver and brain. However, colonic metastases from breast cancer are very rare in the clinic. We describe an unusual case of sigmoid colonic metastasis from invasive ductal breast cancer. With this report, we should increase the clinical awareness that any patient with a colorectal lesion and a history of malignancy should be considered to have a metastasis until proven otherwise. Early diagnosis is very important, which enables prompt initiation of systemic treatment, such as chemotherapy, endocrine therapy or both, thus avoiding unnecessary radical surgical resection and improving the prognosis.
World Journal of Surgical Oncology 11/2012; 10(1):256. · 1.12 Impact Factor
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ABSTRACT: We investigate the possibilities of finding the effects of the littlest Higgs (LH) model on the process e
+
e
− → µ+µ− at the leading-order at a possible Z
0-factory. We study the impacts of the LH model on the observables, such as, the total cross section, the distribution of the
transverse momentum of µ−, and the forward-backward charge asymmetry of µ− in polarized and unpolarized electron-positron collision modes. Besides, we analyze the relations between the observables
and the LH model parameters, and discuss the observables of process e
+
e
− → µ+µ− in different incoming electron-positron polarization modes. We conclude that one could observe the effects contributed by
the LH model on the process e
+
e
− → µ+µ− in a reasonable parameter space, or might put more stringent constraints on the LH parameters in the future experiments at
the possible Z
0-factory.
Keywords
Z
0-factory-electron-positron collider-µ-pair production-the littlest Higgs model
Science China: Physics, Mechanics and Astronomy 04/2012; 53(11):1961-1967. · 0.78 Impact Factor
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ABSTRACT: The potential for probing the impacts of the left-right symmetric model (LRM) on the process e
+
e
− → µ+µ− at a proposed Z
0-factory is investigated. Under different electron-positron polarization collision modes, we calculate and compare the deviations
of various observables in the framework of the LRM from the standard model (SM) predictions, such as the total cross section,
the distribution of the transverse momentum of µ−, and the forward-backward charge asymmetry of µ−. In addition, we present the relations between the observables and the LRM parameters. We conclude that it is possible to
observe the effects of the LRM on the process e
+
e
− → µ+µ− by using optimal observables and favorable parameters at a Z
0-factory.
Keywords
Z
0-factory-electron-positron collider-µ-pair production-the left-right symmetric model
Science China: Physics, Mechanics and Astronomy 04/2012; 53(11):1975-1980. · 0.78 Impact Factor
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ABSTRACT: The CP-violating effects to the subprocess $gg\to H^+H^-$ is studied in the mSUGRA scenario at the CERN LHC, by taking into account the experimental bounds of electron and neutron EDM's. The CP violation effects in this process are related to the complex phases of $\mu$ and $A_{f}$ in the mSUGRA scenario. In our calculation we consider small CP phases of $\mu$ and $A_{f}$ and neglect the effects of neutral Higgs bosons mixing. In this case the CP effects to the process mainly come from the complex couplings of Higgs-squark-squark. We find a strong dependence of charged Higgs boson pair production rate on the complex couplings in the MSSM parameter space.
01/2001;
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ABSTRACT: The subprocess $gg \to t\bar{c}+\bar{t}c$ in the two-Higgs-doublet model with flavor-changing scalar couplings is examined at the one loop level. With perturbative QCD factorization theorem, the corresponding cross sections for hadron-hadron collisions are computed numerically. The results are applicable to the whole mass range of the weakly coupled Higgs bosons. In case we could efficiently exclude the severe backgrounds of the $t\bar{c}(\bar{t}c)$ production signal, probing the flavor-changing top-charm-scalar vertex at hadron colliders would be very promising and accessible experimentally. Comment: LaTex file, 14 pages, 8 EPS figures
03/2000;
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ABSTRACT: We calculated the complete next-to-leading order (NLO) QCD corrections to the production process at a γγ collider in the Standard Model (SM). The calculation of the one-loop QCD correction includes the evaluations of the hexagon and pentagon amplitudes. We studied the NLO QCD corrected total cross section, the distributions of transverse momenta of final top- and bottom-quark states, and the dependence of the cross section on renormalization scale μ. It shows that NLO QCD correction generally increases the LO cross section in our chosen parameter space, and the K-factor varies from 1.70 to 1.14 when colliding energy goes up from 400 GeV to 2 TeV. We find that the correction distinctly changes the distributions of transverse momenta of the final top- and bottom-quark states, and the NLO QCD correction obviously improves the independence of the cross section for process on the renormalization scale.
Physics Letters B.
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ABSTRACT: A multi-layer adaptive optimizing parameters algorithm is developed for improving least squares support vector machines (LS-SVM), and a military equipment intelligent cost estimation model is proposed based on the optimized LS-SVM. The intelligent cost estimation process is divided into three steps in the model. In the first step, cost-drive-factor is needed to be selected, which is significant for costs estimation. In the second step, military equipment training samples within costs and cost-drive-factor set are learned by the LS-SVM. After learned, the model can be used for new equipment costs estimation. Aircraft costs become more expensive in recent years. Chinese military aircraft costs are estimation in the paper. The results show that the estimation costs by the new model are more closed to the true costs than that of traditional used method.
2012 Fourth International Conference on Computational and Information Sciences.
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ABSTRACT: In this paper we demonstrate the energetic capabilities of γγ collision mode at NLC for new particle pair production, NSM strong CP-violation and heavy flavour FCNC studies. It is pointed out that if the luminosities of photons are comparable to those of e+e− collision mode, photon–photon collider will dominate over the NLC physics.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
