# Comparative study of the forward and backward methods for calculating jet properties in pp collisions at ${\sqrt{ s}}$=7 TeV

• We propose a forward method based on PYTHIA6.4 to study the jet properties in ultra-relativistic pp collisions. In the forward method, the partonic initial states are first generated with PYTHIA6.4 and then hadronized in the Lund string fragmentation model, and finally the hadronic jets are constructed from the created hadrons. Jet properties calculated with the forward method for pp collisions at $\sqrt{s}$=7 TeV are comparable to those calculated with the usual anti-$k_t$ algorithm (backward method) in PYTHIA6.4. The comparison between the backward and forward methods may contribute to the understanding of the partonic origin of jets in the backward method.

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. doi: 10.1088/1674-1137/44/3/034104
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Revised: 2019-12-10
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###### 通讯作者: 陈斌, bchen63@163.com
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沈阳化工大学材料科学与工程学院 沈阳 110142

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## Comparative study of the forward and backward methods for calculating jet properties in pp collisions at ${\sqrt{ s}}$=7 TeV

###### Corresponding author: Ben-Hao Sa, sabh@ciae.ac.cn
• 1. China Institute of Atomic Energy, P. O. Box 275 (10), Beijing 102413, China
• 2. Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
• 3. School of Physics and Center of Excellence in High Energy Physics & Astrophysics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
• 4. Department of Physics, Naresuan University, Phitsanulok 65000, Thailand

Abstract: We propose a forward method based on PYTHIA6.4 to study the jet properties in ultra-relativistic pp collisions. In the forward method, the partonic initial states are first generated with PYTHIA6.4 and then hadronized in the Lund string fragmentation model, and finally the hadronic jets are constructed from the created hadrons. Jet properties calculated with the forward method for pp collisions at $\sqrt{s}$=7 TeV are comparable to those calculated with the usual anti-$k_t$ algorithm (backward method) in PYTHIA6.4. The comparison between the backward and forward methods may contribute to the understanding of the partonic origin of jets in the backward method.

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