共查询到20条相似文献,搜索用时 15 毫秒
1.
Physics of Atomic Nuclei - The search for the associated production of a Higgs boson with a top quark–antiquark pair with the CMS detector will be presented. Candidate $$t\bar{t}H$$ events... 相似文献
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Physics of Atomic Nuclei - The coherent photoproduction of $$\pi^{0}\pi^{0}$$ and $$\pi^{0}\eta$$ on nuclei in the mass-number region of $$A\leqslant 7$$ is studied systematically over the range... 相似文献
3.
R. M. Godbole C. Hangst M. Mühlleitner S. D. Rindani P. Sharma 《The European Physical Journal C - Particles and Fields》2011,71(6):1-19
In this paper we investigate methods to study the $t\bar{t}$ Higgs coupling. The spin and CP properties of a Higgs boson are analysed in a model-independent way in its associated production with a $t\bar{t}$ pair in high-energy e + e ? collisions. We study the prospects of establishing the CP quantum numbers of the Higgs boson in the CP-conserving case as well as those of determining the CP-mixing if CP is violated. We explore in this analysis the combined use of the total cross section and its energy dependence, the polarisation asymmetry of the top quark and the up-down asymmetry of the antitop with respect to the top–electron plane. We find that combining all three observables remarkably reduces the error on the determination of the CP properties of the Higgs Yukawa coupling. Furthermore, the top polarisation asymmetry and the ratio of cross sections at different collider energies are shown to be sensitive to the spin of the particle produced in association with the top-quark pair. 相似文献
4.
Miklukho O. V. Kisselev A. Yu. Amalsky G. M. Andreev V. A. Barsov S. G. Gavrilov G. E. Zhdanov A. A. Izotov A. A. Ilyin D. S. Kozlenko N. G. Kravchenko P. V. Maysuzenko D. A. Murzin V. I. Novinskiy D. V. Shvedchikov A. V. 《Physics of Atomic Nuclei》2020,83(3):431-441
Physics of Atomic Nuclei - The secondary proton polarization and differential cross sections of the ( $$p,p^{\prime}$$ ) inelastic reaction on nuclei $${}^{9}$$ Be and $${}^{90}$$ Zr at the initial... 相似文献
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JETP Letters - Recent experiments have discovered two exponents in the $$pp$$ elastic differential cross sections with two d-ifferent slope parameters, of the order 16–20 GeV–2 and... 相似文献
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7.
Mary Alberg 《Hyperfine Interactions》2009,194(1-3):327-330
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Galanina L. I. Zelenskaya N. S. Lebedev V. M. Orlova N. V. Spassky A. V. 《Physics of Atomic Nuclei》2020,83(3):369-376
Physics of Atomic Nuclei - Angular $$t$$ – $$\gamma$$ correlations measured earlier in the reaction $${}^{27}$$ Al $$(\alpha,t)^{28}$$ Si(2 $${}^{+}$$ ) occurring at $$E_{\alpha}=30.3$$ MeV... 相似文献
9.
The Lie algebra
is “deformed” using twisted derivations satisfying a twisted Leibniz rule. Some particular algebras appearing in this deformation
scheme are discussed.
Presented at the International Colloquium “Integrable Systems and Quantum Symmetries”, Prague, 16–18 June 2005.
Supported by the Liegrits network
Supported by the Crafoord foundation 相似文献
10.
Zahra Sarwat Andleeb Sundas Fatima Shafaq Bushra Kanwal Bushra Saeed Khadija Zahra Samreen 《Physics of Atomic Nuclei》2022,85(1):139-143
Physics of Atomic Nuclei - Using differential cross-section data on $$p\bar{p}$$ elastic scattering at $$\sqrt{s}=31$$ , 53, 62, and 1960 GeV, for low momentum transfer square (... 相似文献
11.
Physics of Atomic Nuclei - Based on the behavior of elastic scattering of proton and anti-proton at $$\sqrt{s}=1.96$$ TeV for squared four-momentum transfer $$0.26<{-}t<1.2($$ GeV... 相似文献
12.
Vorobiev A. P. Kiryakov A. A. Ronjin V. M. Ryadovikov V. N. Petukhov Yu. P. 《Physics of Atomic Nuclei》2021,84(4):460-466
Physics of Atomic Nuclei - The active target with C, Si and Pb plates was irradiated in 70-GeV proton beam at U-70 accelerator. The signal (270 events) from $$\Sigma^{0}\to\Lambda^{0}+\gamma$$... 相似文献
13.
Uskov A. A. Fedotovich G. V. Ivanov V. L. Shemyakin D. N. 《Physics of Atomic Nuclei》2021,84(1):45-51
Physics of Atomic Nuclei - A preliminary result of an analysis of the process $$e^{+}e^{-}\to K_{S}K^{\pm}\pi^{\mp}$$ whose cross section was measured in the range of center-of-mass collision... 相似文献
14.
Si-Qiang Luo Kan Chen Xiang Liu Yan-Rui Liu Shi-Lin Zhu 《The European Physical Journal C - Particles and Fields》2017,77(10):709
In this work, we study systematically the mass splittings of the \(qq\bar{Q}\bar{Q}\) (\(q=u\), d, s and \(Q=c\), b) tetraquark states with the color-magnetic interaction by considering color mixing effects and estimate roughly their masses. We find that the color mixing effect is relatively important for the \(J^P=0^+\) states and possible stable tetraquarks exist in the \(nn\bar{Q}\bar{Q}\) (\(n=u\), d) and \(ns\bar{Q}\bar{Q}\) systems either with \(J=0\) or with \(J=1\). Possible decay patterns of the tetraquarks are briefly discussed. 相似文献
15.
C. Greub M. Neubert B. D. Pecjak 《The European Physical Journal C - Particles and Fields》2010,65(3-4):501-515
We study the impact of next-to-next-to-leading order (NNLO) QCD corrections on partial decay rates in $\bar{B}\to X_{u}\ell \bar{\nu}_{\ell}$ decays, at leading-order in the 1/m b expansion for shape-function kinematics. These corrections are implemented within a modified form of the BLNP framework, which allows for arbitrary variations of the jet scale μ i ~1.5 GeV. Our analysis includes a detailed comparison between resummed and fixed-order perturbation theory, and between the complete NNLO results and those obtained in the large-β 0 approximation. For the default choice μ i =1.5 GeV used in current extractions of |V ub | within the BLNP framework, the NNLO corrections induce significant downward shifts in the central values of partial decay rates with cuts on the hadronic variable P +, the hadronic invariant mass, and the lepton energy. At the same time, perturbative uncertainties are reduced, especially those at the jet scale, which are the dominant ones at next-to-leading order (NLO). For higher values of μ i and in fixed-order perturbation theory, the shifts between NLO and NNLO are more moderate. We combine our new results with known power-suppressed terms in order to illustrate the implications of our analysis on the determination of |V ub | from inclusive decays. 相似文献
16.
Glauber theory is applied to ${{\bar p} d}$ scattering at beam energies 20?C300?MeV using the ${{\bar N} N}$ amplitudes of the Jülich models. The available data for unpolarized differential and total cross section are well described within this approach. The polarized total ${{\bar p} d}$ cross sections are calculated within the single-scattering approximation using the optical theorem. 相似文献
17.
Physics of Atomic Nuclei - $$\alpha$$ decay of 2000 parent heavy and superheavy nuclei, with atomic numbers in the range $$Z=80$$ to $$Z=122$$ , is considered. We calculated the half-life time,... 相似文献
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