Nominalizations: from Features to Applications in Abstracts of Linguistics Academic Papers

This article analyzes several features and applications of five types of nominalizations in abstracts from linguistics academic papers under the guidance of grammatical metaphor raised by Halliday By adopting a mixture of qualitative and quantitative methods frequencies of each type of nominalization were calculated and features of these nominalizations were discussed Results revealed that process nominalization occupied 84 8 and quality nominalization accounted for 13 4 However circumstance nominalization and relator nominalization only accounted for 0 2 and 1 1 respectively Furthermore the author only found 6 instances of zero nominalization Additionally it is found that process nominalization can condense information increase the level of abstraction of abstracts and form fixed collocation patterns in abstracts Quality nominalization can achieve impersonalization but meanwhile increase the distance between readers and writers Circumstance relator and zero nominalization are rarely used in abstracts because they increase the complexity of abstracts weaken the logical link and add some unnecessary information On the basis of the findings practical implications are discusse

Enhancement of Dark Matter Annihilation via Breit-Wigner Resonance

The Breit-Wigner enhancement of the thermally averaged annihilation cross section is shown to provide a large boost factor when the dark matter annihilation process nears a narrow resonance. We explicitly demonstrate the evolution behavior of the Breit-Wigner enhanced as the function of universe temperature for both the physical and unphysical pole cases. It is found that both of the cases can lead an enough large boost factor to explain the recent PAMELA, ATIC and PPB-BETS anomalies. We also calculate the coupling of annihilation process, which is useful for an appropriate model building to give the desired dark matter relic density.Comment: 4 pages, 4 figures, references added, accepted for publication in Physical Review

Central-edge asymmetry as a probe of Higgs-top coupling in ttˉht\bar{t}h production at LHC

The Higgs-top coupling plays a central role in the hierarchy problem and the vacuum stability of the Standard Model (SM). We propose a central-edge asymmetry ($A_{CE}$) to probe the CP violating Higgs-top coupling in dileptonic channel of $t\bar{t}h(\to b\bar{b})$ production at the LHC. We demonstrate that the CP-violating Higgs-top coupling can affect the central-edge asymmetry through distorting $\Delta y_{\ell^+\ell^-}$ distribution because of the contribution of new top charge asymmetric term. Since $\Delta y_{\ell^+\ell^-}$ distribution is frame-independent and has a good discrimination even in boosted regime, we use the jet substructure technique to enhance the observability of the dileptonic channel of $t\bar{t}h$ production. We find that (1) the significance of dileptonic channel of $t\bar{t}h$ production can reach $5\sigma$ for CP phase $\xi=0,\pi/4,\pi/2$ when the luminosity ${\cal L}=795,993,1276$ fb$^{-1}$ at 14 TeV LHC. (2) the central-edge asymmetry $A_{CE}$ show a good discrimination power of CP phase of $t\bar{t}h$ interaction, which are -40.26\%, -26.60\%, -9.47\% for $\xi=0$, $\pi/4$, $\pi/2$ respectively and are hardly affected by the event selections. Besides, by performing the binned-$\chi^2$ analysis of $\Delta y_{\ell^+\ell^-}$ distribution, we find that the scalar and pseudo-scalar interactions can be distinguished at 95\% C.L. level at 14 TeV HL-LHC.Comment: minor changes, version accepted by PL