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Comparison of $pp$ and $p \bar{p}$ differential elastic cross sections and observation of the exchange of a colorless $C$-odd gluonic compound
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arxiv 2012.03981 v2 pith:54WMTHG2 submitted 2020-12-07 hep-ex
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abstract
We describe an analysis comparing the $p\bar{p}$ elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in $pp$ collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a model-independent approach. The TOTEM cross sections extrapolated to a center-of-mass energy of $\sqrt{s} =$ 1.96 TeV are compared with the D0 measurement in the region of the diffractive minimum and the second maximum of the $pp$ cross section. The two data sets disagree at the 3.4$\sigma$ level and thus provide evidence for the $t$-channel exchange of a colorless, $C$-odd gluonic compound, also known as the odderon. We combine these results with a TOTEM analysis of the same $C$-odd exchange based on the total cross section and the ratio of the real to imaginary parts of the forward elastic scattering amplitude in $pp$ scattering. The combined significance of these results is larger than 5$\sigma$ and is interpreted as the first observation of the exchange of a colorless, $C$-odd gluonic compound.
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Cited by 3 Pith papers
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All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
hep-ph 2026-04 unverdicted novelty 5.5 of 10
TQ4Q2.0 supplies the first complete, uncertainty-quantified set of NRQCD-based fragmentation functions for all-heavy tetraquarks, including nonconstituent channels and public grids for jet-associated production.
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Odderon exchange in high-energy $K^0_S$ regeneration at the LHC
hep-ph 2026-08 conditional novelty 5.0 of 10
A feasibility study showing LHC neutral-kaon regeneration could probe the Odderon only with a 1 km-scale beamline, 10^4 kaon decays, and one to two orders of magnitude neutron-background suppression.
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Geometric Scaling and the Odderon
hep-ph 2026-07 conditional novelty 5.0 of 10
A geometric-scaling model with a crossing-odd amplitude and a maximal-Odderon correction can reproduce low-energy rho data and accommodate the TOTEM 13 TeV rho_pp measurement.
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