Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

Abstract

The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 ¹¹ muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.

Original language	English
Article number	284
Journal	European Physical Journal C
Volume	80
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s10052-020-7788-y
Publication status	Published - 1 Mar 2020
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-020-7788-y

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The COMPASS Collaboration (2020). Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target. European Physical Journal C, 80(3), [284]. https://doi.org/10.1140/epjc/s10052-020-7788-y

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title = "Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target",

abstract = "The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.",

author = "{The COMPASS Collaboration} and C. Ahdida and A. Akmete and R. Albanese and A. Alexandrov and A. Anokhina and S. Aoki and G. Arduini and E. Atkin and N. Azorskiy and Back, {J. J.} and A. Bagulya and Santos, {F. Baaltasar Dos} and A. Baranov and F. Bardou and Barker, {G. J.} and M. Battistin and J. Bauche and A. Bay and V. Bayliss and G. Bencivenni and Berdnikov, {A. Y.} and Berdnikov, {Y. A.} and M. Bertani and C. Betancourt and I. Bezshyiko and O. Bezshyyko and D. Bick and S. Bieschke and A. Blanco and J. Boehm and M. Bogomilov and I. Boiarska and K. Bondarenko and Bonivento, {W. M.} and J. Borburgh and A. Boyarsky and R. Brenner and D. Breton and V. B{\"u}scher and A. Buonaura and S. Buontempo and S. Cadeddu and A. Calcaterra and M. Calviani and M. Campanelli and M. Casolino and A. Chumakov and V. Kim and V. Lyubovitskij and A. Petrov",

year = "2020",

month = mar,

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doi = "10.1140/epjc/s10052-020-7788-y",

language = "English",

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journal = "European Physical Journal C",

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TY - JOUR

T1 - Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

AU - The COMPASS Collaboration

AU - Ahdida, C.

AU - Akmete, A.

AU - Albanese, R.

AU - Alexandrov, A.

AU - Anokhina, A.

AU - Aoki, S.

AU - Arduini, G.

AU - Atkin, E.

AU - Azorskiy, N.

AU - Back, J. J.

AU - Bagulya, A.

AU - Santos, F. Baaltasar Dos

AU - Baranov, A.

AU - Bardou, F.

AU - Barker, G. J.

AU - Battistin, M.

AU - Bauche, J.

AU - Bay, A.

AU - Bayliss, V.

AU - Bencivenni, G.

AU - Berdnikov, A. Y.

AU - Berdnikov, Y. A.

AU - Bertani, M.

AU - Betancourt, C.

AU - Bezshyiko, I.

AU - Bezshyyko, O.

AU - Bick, D.

AU - Bieschke, S.

AU - Blanco, A.

AU - Boehm, J.

AU - Bogomilov, M.

AU - Boiarska, I.

AU - Bondarenko, K.

AU - Bonivento, W. M.

AU - Borburgh, J.

AU - Boyarsky, A.

AU - Brenner, R.

AU - Breton, D.

AU - Büscher, V.

AU - Buonaura, A.

AU - Buontempo, S.

AU - Cadeddu, S.

AU - Calcaterra, A.

AU - Calviani, M.

AU - Campanelli, M.

AU - Casolino, M.

AU - Chumakov, A.

AU - Kim, V.

AU - Lyubovitskij, V.

AU - Petrov, A.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.

AB - The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.

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DO - 10.1140/epjc/s10052-020-7788-y

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JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

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