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Erratum to “Rapidity and transverse momentum dependence of inclusive J/ψJ/ψ production in pp collisions at root s = 7 TeV

(ALICE Collaboration) Aamodt, K (Aamodt, K.); Quintana, AA (Quintana, A. Abrahantes); Adamova, D (Adamova, D.); Adare, AM (Adare, A. M.); Aggarwal, MM (Aggarwal, M. M.); Rinella, GA (Rinella, G. Aglieri); Agocs, AG (Agocs, A. G.); Agostinelli, A (Agostinelli, A.); Salazar, SA (Salazar, S. Aguilar); Ahammed, Z (Ahammed, Z.); Ahmad, N (Ahmad, N.); Masoodi, AA (Masoodi, A. Ahmad); Ahn, SU (Ahn, S. U.); Akindinov, A (Akindinov, A.); Aleksandrov, D (Aleksandrov, D.); Alessandro, B (Alessandro, B.); Molina, RA (Molina, R. Alfaro); Alici, A (Alici, A.); Alkin, A (Alkin, A.); Avina, EA (Avina, E. Almaraz); Alme, J (Alme, J.); Alt, T (Alt, T.); Altini, V (Altini, V.); Altsybeev, I (Altsybeev, I.); Andrei, C (Andrei, C.); Andronic, A (Andronic, A.); Anguelov, V (Anguelov, V.); Anson, C (Anson, C.); Anticic, T (Anticic, T.); Antinori, F (Antinori, F.); Antonioli, P (Antonioli, P.); Aphecetche, L (Aphecetche, L.); Appelshauser, H (Appelshaeuser, H.); Arbor, N (Arbor, N.); Arcelli, S (Arcelli, S.); Arend, A (Arend, A.); Armesto, N (Armesto, N.); Arnaldi, R (Arnaldi, R.); Aronsson, T (Aronsson, T.); Arsene, IC (Arsene, I. C.); Asryan, A (Asryan, A.); Augustinus, A (Augustinus, A.); Averbeck, R (Averbeck, R.); Awes, TC (Awes, T. C.); Aysto, J (Aysto, J.); Azmi, MD (Azmi, M. D.); Bach, M (Bach, M.); Badala, A (Badala, A.); Baek, YW (Baek, Y. W.); Bailhache, R (Bailhache, R.); Bala, R (Bala, R.); Ferroli, RB (Ferroli, R. Baldini); Baldisseri, A (Baldisseri, A.); Baldit, A (Baldit, A.); Ban, J (Ban, J.); Barbera, R (Barbera, R.); Barile, F (Barile, F.); Barnafoldi, GG (Barnafoeldi, G. G.); Barnby, LS (Barnby, L. S.); Barret, V (Barret, V.); Bartke, J (Bartke, J.); Basile, M (Basile, M.); Bastid, N (Bastid, N.); Bathen, B (Bathen, B.); Batigne, G (Batigne, G.); Batyunya, B (Batyunya, B.); Baumann, C (Baumann, C.); Bearden, IG (Bearden, I. G.); Beck, H (Beck, H.); Belikov, I (Belikov, I.); Bellini, F (Bellini, F.); Bellwied, R (Bellwied, R.); Belmont-Moreno, E (Belmont-Moreno, E.); Beole, S (Beole, S.); Berceanu, I (Berceanu, I.); Bercuci, A (Bercuci, A.); Berdermann, E (Berdermann, E.); Berdnikov, Y (Berdnikov, Y.); Bergmann, C (Bergmann, C.); Betev, L (Betev, L.); Bhasin, A (Bhasin, A.); Bhati, AK (Bhati, A. K.); Bianchi, L (Bianchi, L.); Bianchi, N (Bianchi, N.); Bianchin, C (Bianchin, C.); Bielcik, J (Bielcik, J.); Bielcikova, J (Bielcikova, J.); Bilandzic, A (Bilandzic, A.); Biolcati, E (Biolcati, E.); Blanc, A (Blanc, A.); Blanco, F (Blanco, F.); Blanco, F (Blanco, F.); Blau, D (Blau, D.); Blume, C (Blume, C.); Bock, N (Bock, N.); Bogdanov, A (Bogdanov, A.); Boggild, H (Boggild, H.); Bogolyubsky, M (Bogolyubsky, M.); Boldizsar, L (Boldizsar, L.); Bombara, M (Bombara, M.); Bombonati, C (Bombonati, C.); Book, J (Book, J.); Borel, H (Borel, H.); Borissov, A (Borissov, A.); Bortolin, C (Bortolin, C.); Bose, S (Bose, S.); Bossu, F (Bossu, F.); Botje, M (Botje, M.); Bottger, S (Boettger, S.); Boyer, B (Boyer, B.)... (2012) Erratum to “Rapidity and transverse momentum dependence of inclusive J/ψJ/ψ production in pp collisions at root s = 7 TeV. Physics Letters B, 718 (2). pp. 692-698. ISSN 0370-2693

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We have identified a bias in the calculation of the cross section of J/ψJ/ψ production measured in the e+e−e+e− channel at central rapidity (|y|<0.9|y|<0.9) [1]. The acceptance and efficiency corrections were evaluated using a Monte Carlo simulation, based on PYTHIA [2] and [3], which did not include the radiative decays of J/ψJ/ψ (J/ψ→e+e−γJ/ψ→e+e−γ). In these decays the reconstructed dielectron invariant mass, me+e−me+e−, is biased towards smaller values than the nominal J/ψJ/ψ mass, since the photon contribution is neglected. As a consequence, the fraction of signal events in the me+e−me+e− range 2.92–3.16 GeV/c2 was overestimated by about 10%. Moreover, the requirement of the transverse momentum of the daughter electrons being larger than 1 GeV/c is more selective for radiative than non-radiative J/ψJ/ψ decays. Therefore, the J/ψJ/ψ acceptance was also overestimated by about 5%.

Item Type: Article
Uncontrolled Keywords: ALICE; LHC; J/Psi; 7 TeV; p+p; erratum
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Depositing User: Tome Antičić
Date Deposited: 04 Apr 2016 15:16
DOI: 10.1016/j.physletb.2012.10.060

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