SCOAP3 Repository 4 records found  Search took 0.01 seconds. 
1. Moduli space of paired punctures, cyclohedra and particle pairs on a circle / Li, Zhenjie ; Zhang, Chi
In this paper, we study a new moduli space ℳ n + 1 c $$ {\mathrm{\mathcal{M}}}_{n+1}^{\mathrm{c}} $$ , which is obtained from ℳ 0 , 2 n + 2 $$ {\mathrm{\mathcal{M}}}_{0,2n+2} $$ by identifying pairs of punctures. [...]
Published in JHEP 1905 (2019) 029 10.1007/JHEP05(2019)029 arXiv:1812.10727
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2. Notes on scattering amplitudes as differential forms / He, Song ; Zhang, Chi
Inspired by the idea of viewing amplitudes in N = 4 $$ \mathcal{N}=4 $$ SYM as differential forms on momentum twistor space, we introduce differential forms on the space of spinor variables, which combine helicity amplitudes in any four-dimensional gauge theory as a single object. [...]
Published in JHEP 1810 (2018) 054 10.1007/JHEP10(2018)054 arXiv:1807.11051
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3. Scattering forms, worldsheet forms and amplitudes from subspaces / He, Song ; Yan, Gongwang ; Zhang, Chi ; Zhang, Yong
We present a general construction of two types of differential forms, based on any ( n −3)-dimensional subspace in the kinematic space of n massless particles. [...]
Published in JHEP 1808 (2018) 040 10.1007/JHEP08(2018)040 arXiv:1803.11302
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4. One loop amplitude from null string / Yu, Ming ; Zhang, Chi ; Zhang, Yao-Zhong
We generalize the CHY formalism to one-loop level, based on the framework of the null string theory. [...]
Published in JHEP 1706 (2017) 051 10.1007/JHEP06(2017)051 arXiv:1704.01290
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