Abstract
We introduce a numerical package FORward Experiment SEnsitivity Estimator, or $\mathtt{FORESEE}$, that can be used to simulate the expected sensitivity reach of experiments placed in the far-forward direction from the proton-proton interaction point. The simulations can be performed for 14 TeV collision energy characteristic for the LHC, as well as for larger energies; 27 and 100 TeV. In the package, a comprehensive list of validated forward spectra of various SM species is also provided. The capabilities of $\mathtt{FORESEE}$ are illustrated for the popular dark photon and dark Higgs boson models, as well as for the search for light up-philic scalars. For the dark photon portal, we also comment on the complementarity between such searches and dark matter direct detection bounds. Additionally, for the first time, we discuss the prospects for the LLP searches in the proposed future hadron colliders: High-Energy LHC (HE-LHC), Super proton-proton Collider (SppC), and Future Circular Collider (FCC-hh).
Highlights
The Large Hadron Collider (LHC) has proven to be a powerful tool for studying both new physics and the Standard Model (SM), with its most remarkable achievement related to the discovery of the Higgs boson [1,2]
We show in the plot past bounds from the BABAR [33], CHARM, E137 [35], E141 [36], LHCb [37], NA48=2 [38], NA64 [39], and NuCal [40] experiments, as well as complementary future sensitivity reach lines relevant for searches performed by Belle-II [41], HPS [42,43], LHCb [44,45], NA62 [46], SeaQuest [47], and SHiP [48]
The upcoming LHC Run 3 will soon begin the chapter in the continued efforts towards discovering signatures of new physics
Summary
The Large Hadron Collider (LHC) has proven to be a powerful tool for studying both new physics and the Standard Model (SM), with its most remarkable achievement related to the discovery of the Higgs boson [1,2] While further such outstanding signatures of new particles are much awaited, the data collected in the LHC have already been used to constrain many beyond the Standard Model (BSM) scenarios in a tremendous number of phenomenological analyses. Above Oð10 GeVÞ up to a few TeV scale, lighter new physics species could become more accessible with modified experimental strategies [5] This observation has lead to the establishment of a new direction in the BSM searches at the LHC in its far-forward region, as originally proposed [6,7,8,9] for the FASER experiment [10,11,12].
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