Study of p-Air Inelastic Cross Section with Directly Arrived Protons at Yangbajing

LAN Xiao-Gang; HOU Yan; ZHOU Xun-Xiu; JIA Huan-Yu; CAO Zhen; DING Lin-Kai

Chinese Physics C> 2007, Vol. 31> Issue(6) : 513-517

Study of p-Air Inelastic Cross Section with Directly Arrived Protons at Yangbajing

Institute of Modern Physics, Southwest Jiaotong University, Chengdu 610031, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

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Abstract：
A method of determining the p-air inelastic cross section by measuring the directly arrived protons at high altitudes is presented. Its feasibility is studied via a Monte Carlo simulation. Assuming a KASCADE-like hadron calorimeter is set up at the center of the Yangbajing ARGO array, selecting events with air shower (AS) cores hitting the calorimeter, using the full-coverage ARGO array as AS anti-coincidence and using the calorimeter to measure energies of the unaccompanied hadrons, the directly arrived primary protons can be registered with a known efficiency. By the obtained event sample of directly arrived protons the p-air inelastic cross section used in the Monte Carlo can be re-produced with a precision of 1%—2% that demonstrates the feasibility of this approach.

References

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LAN Xiao-Gang, HOU Yan, ZHOU Xun-Xiu, JIA Huan-Yu, CAO Zhen and DING Lin-Kai. Study of p-Air Inelastic Cross Section with Directly Arrived Protons at Yangbajing[J]. Chinese Physics C, 2007, 31(6): 513-517.

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Received: 2006-09-11
Revised: 2006-10-10

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of p-Air Inelastic Cross Section with Directly Arrived Protons at Yangbajing

Corresponding author: LAN Xiao-Gang,

Institute of Modern Physics, Southwest Jiaotong University, Chengdu 610031, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

Received Date: 2006-09-11

Accepted Date: 2006-10-10

Available Online: 2007-06-05

Abstract: A method of determining the p-air inelastic cross section by measuring the directly arrived protons at high altitudes is presented. Its feasibility is studied via a Monte Carlo simulation. Assuming a KASCADE-like hadron calorimeter is set up at the center of the Yangbajing ARGO array, selecting events with air shower (AS) cores hitting the calorimeter, using the full-coverage ARGO array as AS anti-coincidence and using the calorimeter to measure energies of the unaccompanied hadrons, the directly arrived primary protons can be registered with a known efficiency. By the obtained event sample of directly arrived protons the p-air inelastic cross section used in the Monte Carlo can be re-produced with a precision of 1%—2% that demonstrates the feasibility of this approach.

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Study of p-Air Inelastic Cross Section with Directly Arrived Protons at Yangbajing

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