论文标题
伽玛 - UPC：超递质质子和具有不同形式因素的核碰撞中的独家光子光子过程的自动生成
gamma-UPC: Automated generation of exclusive photon-photon processes in ultraperipheral proton and nuclear collisions with varying form factors
论文作者
论文摘要
通过光子融合产生的任意独家最终状态在质子和/或核的超疗法高能碰撞中产生的自动生成，在MADGRAPH5_AMC@NLO和HELACONIA MONTE CARLO CARLO代码中实现。横截面是在等效光子近似中使用$γ$通量计算的，该通量来自电偶极子和电荷形式，并纳入了规格的生存概率。用该设置计算的$γγ$横截面的多个示例，称为Gamma-upc，用于质子 - 蛋白质，质子核核和核核核核核酸核超疗法碰撞（UPC），并在大型Hadron撞机和未来的圆形撞机上呈现。用于独家生产自旋-0,2共振（Quarkonia，ditauonium和Higgs Boson；以及轴和吸引力）的总光子融合横截面，以及成对的颗粒（$ J/ψJ/ψ$，ww，ww，ww，ww，zz zz，z $ qu $γ$，$γ$，$ t \ bar bar）是将二种障碍和光线散射的差分横截面与LHC数据进行了比较。这一开发为即将在近代领先订单准确性及更高版本的Electroweak校正的任何UPC最终状态的自动事件生成铺平了道路。
The automated generation of arbitrary exclusive final states produced via photon fusion in ultraperipheral high-energy collisions of protons and/or nuclei is implemented in the MadGraph5_aMC@NLO and HelacOnia Monte Carlo codes. Cross sections are calculated in the equivalent photon approximation using $γ$ fluxes derived from electric dipole and charge form factors, and incorporating hadronic survival probabilities. Multiple examples of $γγ$ cross sections computed with this setup, named gamma-UPC, are presented for proton-proton, proton-nucleus, and nucleus-nucleus ultraperipheral collisions (UPCs) at the Large Hadron Collider and Future Circular Collider. Total photon-fusion cross sections for the exclusive production of spin-0,2 resonances (quarkonia, ditauonium, and Higgs boson; as well as axions and gravitons), and for pairs of particles ($J/ψJ/ψ$, WW, ZZ, Z$γ$, $t\bar{t}$, HH) are presented. Differential cross sections for exclusive dileptons and light-by-light scattering are compared to LHC data. This development paves the way for the upcoming automatic event generation of any UPC final state with electroweak corrections at next-to-leading-order accuracy and beyond.
