Dijet signals for low mass strings at the Large Hadron Collider

Area of Science:

• High Energy Physics
• String Theory
• Particle Physics

Background:

• String theory proposes fundamental constituents are one-dimensional strings.
• Weakly coupled theories with fundamental string mass scales in the TeV range are considered.
• D-brane constructions offer a framework for studying string physics signals.

Purpose of the Study:

• To explore potential signals of string physics at the Large Hadron Collider (LHC).
• To determine the discovery potential of the LHC for Regge excitations of quarks and gluons.
• To investigate the corroboration of string physics through specific experimental data.

Main Methods:

• Utilizing parameter-free string amplitudes for QCD parton subprocesses leading to dijets.
• Evaluating amplitudes near the first resonant pole.
• Analyzing data from processes like pp-->directgamma + jet.

Main Results:

• The LHC exhibits a discovery reach for string physics up to 6.8 TeV after several years of operation.
• String scales up to 4.0 TeV can be identified with 100 pb(-1) of integrated luminosity.
• Direct photon plus jet production can confirm string physics at scales up to 5 TeV.

Conclusions:

• The LHC has significant potential for discovering string physics within the TeV mass scale.
• Specific experimental signatures, like dijets and direct photon plus jet events, are crucial for validation.
• String theory predictions are testable with current and near-future collider data.