Journal
PHYSICAL REVIEW D
Volume 93, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.93.035005
Keywords
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Funding
- (European Union) 7th Framework Programme (Marie Curie Actions) [269217, 317089]
- Brazilian agency CAPES [BEX 8051/14-3]
- Portuguese Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BCC/105757/2014]
- INFN
- Fundação para a Ciência e a Tecnologia [SFRH/BCC/105757/2014] Funding Source: FCT
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We study the graviton Regge trajectory in holographic QCD as a model for high energy scattering processes dominated by soft-Pomeron exchange. This is done by considering spin J fields from the closed string sector that are dual to glueball states of even spin and parity. In particular, we construct a model that governs the analytic continuation of the spin J field equation to the region of real J < 2, which includes the scattering domain of the negative Maldelstam variable t. The model leads to approximately linear Regge trajectories and is compatible with the measured values of 1.08 for the intercept and 0.25 GeV-2 for the slope of the soft Pomeron. The intercept of the secondary Pomeron trajectory is in the same region of the subleading trajectories, made of mesons, proposed by Donnachie and Landshoff, and should therefore be taken into account.
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