On the origin of small-pT direct electrons in pp collisions

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The possible charm origin of the rapid increase at small pT of the pp electron yield is discussed in the light of recent e+e- data bearing on charm decays. The charm decay electron spectrum required for a quantitative interpretation of the effect is found to be significantly consistent with the mome...

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Autor principal: Ferro Fontán, Constantino
Publicado: 1977
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03693546_v42_n1_p141_FerroFontan
http://hdl.handle.net/20.500.12110/paper_03693546_v42_n1_p141_FerroFontan
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03693546_v42_n1_p141_FerroFontan
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spelling paper:paper_03693546_v42_n1_p141_FerroFontan2023-06-08T15:36:14Z On the origin of small-pT direct electrons in pp collisions Ferro Fontán, Constantino The possible charm origin of the rapid increase at small pT of the pp electron yield is discussed in the light of recent e+e- data bearing on charm decays. The charm decay electron spectrum required for a quantitative interpretation of the effect is found to be significantly consistent with the momentum distribution of the e+e- anomalous electron-plus-hadron events observed at DORIS. The amount of the charm cross-section times the branching ratio, Be σ, demanded by the pp → e + X data is compatible with existing experimental upper limits, once the recent experimental information on charm decays is taken into account. Since charm-originated leptons are limited to very small Feynman x, there is no conflict with the reported evidence for a pair origin of near-forward produced leptons. See note added in proof for revised conclusions based on new e+e- data. © 1977 Società Italiana di Fisica. Fil:Ferro Fontán, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1977 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03693546_v42_n1_p141_FerroFontan http://hdl.handle.net/20.500.12110/paper_03693546_v42_n1_p141_FerroFontan
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The possible charm origin of the rapid increase at small pT of the pp electron yield is discussed in the light of recent e+e- data bearing on charm decays. The charm decay electron spectrum required for a quantitative interpretation of the effect is found to be significantly consistent with the momentum distribution of the e+e- anomalous electron-plus-hadron events observed at DORIS. The amount of the charm cross-section times the branching ratio, Be σ, demanded by the pp → e + X data is compatible with existing experimental upper limits, once the recent experimental information on charm decays is taken into account. Since charm-originated leptons are limited to very small Feynman x, there is no conflict with the reported evidence for a pair origin of near-forward produced leptons. See note added in proof for revised conclusions based on new e+e- data. © 1977 Società Italiana di Fisica.
author Ferro Fontán, Constantino
spellingShingle Ferro Fontán, Constantino
On the origin of small-pT direct electrons in pp collisions
author_facet Ferro Fontán, Constantino
author_sort Ferro Fontán, Constantino
title On the origin of small-pT direct electrons in pp collisions
title_short On the origin of small-pT direct electrons in pp collisions
title_full On the origin of small-pT direct electrons in pp collisions
title_fullStr On the origin of small-pT direct electrons in pp collisions
title_full_unstemmed On the origin of small-pT direct electrons in pp collisions
title_sort on the origin of small-pt direct electrons in pp collisions
publishDate 1977
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03693546_v42_n1_p141_FerroFontan
http://hdl.handle.net/20.500.12110/paper_03693546_v42_n1_p141_FerroFontan
work_keys_str_mv AT ferrofontanconstantino ontheoriginofsmallptdirectelectronsinppcollisions
_version_ 1768542506276880384

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