Upper limit on the antihelium flux in primary cosmic rays

A. G. Mayorov; A. M. Galper; O. Adriani; G. A. Bazilevskaya; G. Barbarino; R. Bellotti; M. Boezio; E. A. Bogomolov; V. Bonvicini; M. Bongi; L. Bonechi; S. V. Borisov; S. Bottai; A. Bruno; S. Vacci; E. Vannuccini; G. I. Vasiliev; S. A. Voronov; Y. Wu; I. A. Danilchenko; W. Gillard; G. Jerse; G. Zampa; N. Zampa; V. G. Zverev; M. Casolino; D. Campana; R. Carbone; A. V. Karelin; P. Carlson; G. Castellini; F. Cafagna; A. N. Kvashnin; S. V. Koldashov; S. A. Koldobsky; S. Yu Krutkov; A. A. Leonov; V. V. Malakhov; V. Malvezzi; L. Marcelli; W. Menn; V. V. Mikhailov; E. Mocchiutti; N. Mori; N. V. Nikonov; G. Osteria; S. Pizzolotto; P. Papini; M. P. De Pascale; P. Picozza; M. Pearce; M. Ricci; S. Ricciarini; M. F. Runtso; M. Simon; N. De Simone; R. Sparvoli; P. Spillantini; Yu I. Stozhkov; V. Di Felice; Yu T. Yurkin

doi:10.1134/s0021364011110087

Upper limit on the antihelium flux in primary cosmic rays

A. G. Mayorov, A. M. Galper, O. Adriani, G. A. Bazilevskaya, G. Barbarino, R. Bellotti, M. Boezio, E. A. Bogomolov, V. Bonvicini, M. Bongi, L. Bonechi, S. V. Borisov, S. Bottai, A. Bruno, S. Vacci, E. Vannuccini, G. I. Vasiliev, S. A. Voronov, Y. Wu, I. A. DanilchenkoW. Gillard, G. Jerse, G. Zampa, N. Zampa, V. G. Zverev, M. Casolino, D. Campana, R. Carbone, A. V. Karelin, P. Carlson, G. Castellini, F. Cafagna, A. N. Kvashnin, S. V. Koldashov, S. A. Koldobsky, S. Yu Krutkov, A. A. Leonov, V. V. Malakhov, V. Malvezzi, L. Marcelli, W. Menn, V. V. Mikhailov, E. Mocchiutti, N. Mori, N. V. Nikonov, G. Osteria, S. Pizzolotto, P. Papini, M. P. De Pascale, P. Picozza, M. Pearce, M. Ricci, S. Ricciarini, M. F. Runtso, M. Simon, N. De Simone, R. Sparvoli, P. Spillantini, Yu I. Stozhkov, V. Di Felice, Yu T. Yurkin

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21 Scopus citations

Abstract

The explanation of the observed baryon asymmetry, i.e., the almost complete absence of antimatter in the visible part of the universe, is one of the most important problems in cosmology. The real asymmetry value can be determined by direct measurements of the fluxes of antinuclei with charges {pipe}Z{pipe} ≥ 2 in primary cosmic rays near the Earth. The results of the search for antihelium using data from the PAMELA experiment obtained from June 2006 to December 2009 are presented. No events with a charge of -2 have been detected in the rigidity range of 0.6-600 GV. An upper limit on the antihelium/helium flux ratio has been presented as a function of the energy. An integral upper level of 4.7 × 10^-7 is the lowest limit at rigidities above 14 GV.

Original language	English
Pages (from-to)	628-631
Number of pages	4
Journal	JETP Letters
Volume	93
Issue number	11
DOIs	https://doi.org/10.1134/s0021364011110087
State	Published - Aug 2011
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Space Council, Russian Academy of Sciences; Russian Federal Space Agency Roscosmos; Progress State Research and Pro duction Space Center; Scientific Center for Operative Monitoring of the Earth; Italian Space Agency; Ger man Aerospace Center; Swiss National Space Coun cil; and Swiss Research Council.

Funding

This work was supported by the Space Council, Russian Academy of Sciences; Russian Federal Space Agency Roscosmos; Progress State Research and Pro duction Space Center; Scientific Center for Operative Monitoring of the Earth; Italian Space Agency; Ger man Aerospace Center; Swiss National Space Coun cil; and Swiss Research Council.

Funders	Funder number
Ger man Aerospace Center
Russian Federal Space Agency Roscosmos
Space Council
Swiss National Space Coun cil
Swiss Research Council
Russian Academy of Sciences
Agenzia Spaziale Italiana

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10.1134/s0021364011110087

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Mayorov, A. G., Galper, A. M., Adriani, O., Bazilevskaya, G. A., Barbarino, G., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonvicini, V., Bongi, M., Bonechi, L., Borisov, S. V., Bottai, S., Bruno, A., Vacci, S., Vannuccini, E., Vasiliev, G. I., Voronov, S. A., Wu, Y., ... Yurkin, Y. T. (2011). Upper limit on the antihelium flux in primary cosmic rays. JETP Letters, 93(11), 628-631. https://doi.org/10.1134/s0021364011110087

@article{02b02d0191b348358c0c0d1945327267,

title = "Upper limit on the antihelium flux in primary cosmic rays",

abstract = "The explanation of the observed baryon asymmetry, i.e., the almost complete absence of antimatter in the visible part of the universe, is one of the most important problems in cosmology. The real asymmetry value can be determined by direct measurements of the fluxes of antinuclei with charges {pipe}Z{pipe} ≥ 2 in primary cosmic rays near the Earth. The results of the search for antihelium using data from the PAMELA experiment obtained from June 2006 to December 2009 are presented. No events with a charge of -2 have been detected in the rigidity range of 0.6-600 GV. An upper limit on the antihelium/helium flux ratio has been presented as a function of the energy. An integral upper level of 4.7 × 10-7 is the lowest limit at rigidities above 14 GV.",

author = "Mayorov, {A. G.} and Galper, {A. M.} and O. Adriani and Bazilevskaya, {G. A.} and G. Barbarino and R. Bellotti and M. Boezio and Bogomolov, {E. A.} and V. Bonvicini and M. Bongi and L. Bonechi and Borisov, {S. V.} and S. Bottai and A. Bruno and S. Vacci and E. Vannuccini and Vasiliev, {G. I.} and Voronov, {S. A.} and Y. Wu and Danilchenko, {I. A.} and W. Gillard and G. Jerse and G. Zampa and N. Zampa and Zverev, {V. G.} and M. Casolino and D. Campana and R. Carbone and Karelin, {A. V.} and P. Carlson and G. Castellini and F. Cafagna and Kvashnin, {A. N.} and Koldashov, {S. V.} and Koldobsky, {S. A.} and Krutkov, {S. Yu} and Leonov, {A. A.} and Malakhov, {V. V.} and V. Malvezzi and L. Marcelli and W. Menn and Mikhailov, {V. V.} and E. Mocchiutti and N. Mori and Nikonov, {N. V.} and G. Osteria and S. Pizzolotto and P. Papini and {De Pascale}, {M. P.} and P. Picozza and M. Pearce and M. Ricci and S. Ricciarini and Runtso, {M. F.} and M. Simon and {De Simone}, N. and R. Sparvoli and P. Spillantini and Stozhkov, {Yu I.} and {Di Felice}, V. and Yurkin, {Yu T.}",

note = "Funding Information: This work was supported by the Space Council, Russian Academy of Sciences; Russian Federal Space Agency Roscosmos; Progress State Research and Pro duction Space Center; Scientific Center for Operative Monitoring of the Earth; Italian Space Agency; Ger man Aerospace Center; Swiss National Space Coun cil; and Swiss Research Council.",

year = "2011",

month = aug,

doi = "10.1134/s0021364011110087",

language = "אנגלית",

volume = "93",

pages = "628--631",

journal = "JETP Letters",

issn = "0021-3640",

publisher = "Pleiades Publishing",

number = "11",

}

Mayorov, AG, Galper, AM, Adriani, O, Bazilevskaya, GA, Barbarino, G, Bellotti, R, Boezio, M, Bogomolov, EA, Bonvicini, V, Bongi, M, Bonechi, L, Borisov, SV, Bottai, S, Bruno, A, Vacci, S, Vannuccini, E, Vasiliev, GI, Voronov, SA, Wu, Y, Danilchenko, IA, Gillard, W, Jerse, G, Zampa, G, Zampa, N, Zverev, VG, Casolino, M, Campana, D, Carbone, R, Karelin, AV, Carlson, P, Castellini, G, Cafagna, F, Kvashnin, AN, Koldashov, SV, Koldobsky, SA, Krutkov, SY, Leonov, AA, Malakhov, VV, Malvezzi, V, Marcelli, L, Menn, W, Mikhailov, VV, Mocchiutti, E, Mori, N, Nikonov, NV, Osteria, G, Pizzolotto, S, Papini, P, De Pascale, MP, Picozza, P, Pearce, M, Ricci, M, Ricciarini, S, Runtso, MF, Simon, M, De Simone, N, Sparvoli, R, Spillantini, P, Stozhkov, YI, Di Felice, V & Yurkin, YT 2011, 'Upper limit on the antihelium flux in primary cosmic rays', JETP Letters, vol. 93, no. 11, pp. 628-631. https://doi.org/10.1134/s0021364011110087

TY - JOUR

T1 - Upper limit on the antihelium flux in primary cosmic rays

AU - Mayorov, A. G.

AU - Galper, A. M.

AU - Adriani, O.

AU - Bazilevskaya, G. A.

AU - Barbarino, G.

AU - Bellotti, R.

AU - Boezio, M.

AU - Bogomolov, E. A.

AU - Bonvicini, V.

AU - Bongi, M.

AU - Bonechi, L.

AU - Borisov, S. V.

AU - Bottai, S.

AU - Bruno, A.

AU - Vacci, S.

AU - Vannuccini, E.

AU - Vasiliev, G. I.

AU - Voronov, S. A.

AU - Wu, Y.

AU - Danilchenko, I. A.

AU - Gillard, W.

AU - Jerse, G.

AU - Zampa, G.

AU - Zampa, N.

AU - Zverev, V. G.

AU - Casolino, M.

AU - Campana, D.

AU - Carbone, R.

AU - Karelin, A. V.

AU - Carlson, P.

AU - Castellini, G.

AU - Cafagna, F.

AU - Kvashnin, A. N.

AU - Koldashov, S. V.

AU - Koldobsky, S. A.

AU - Krutkov, S. Yu

AU - Leonov, A. A.

AU - Malakhov, V. V.

AU - Malvezzi, V.

AU - Marcelli, L.

AU - Menn, W.

AU - Mikhailov, V. V.

AU - Mocchiutti, E.

AU - Mori, N.

AU - Nikonov, N. V.

AU - Osteria, G.

AU - Pizzolotto, S.

AU - Papini, P.

AU - De Pascale, M. P.

AU - Picozza, P.

AU - Pearce, M.

AU - Ricci, M.

AU - Ricciarini, S.

AU - Runtso, M. F.

AU - Simon, M.

AU - De Simone, N.

AU - Sparvoli, R.

AU - Spillantini, P.

AU - Stozhkov, Yu I.

AU - Di Felice, V.

AU - Yurkin, Yu T.

N1 - Funding Information: This work was supported by the Space Council, Russian Academy of Sciences; Russian Federal Space Agency Roscosmos; Progress State Research and Pro duction Space Center; Scientific Center for Operative Monitoring of the Earth; Italian Space Agency; Ger man Aerospace Center; Swiss National Space Coun cil; and Swiss Research Council.

PY - 2011/8

Y1 - 2011/8

N2 - The explanation of the observed baryon asymmetry, i.e., the almost complete absence of antimatter in the visible part of the universe, is one of the most important problems in cosmology. The real asymmetry value can be determined by direct measurements of the fluxes of antinuclei with charges {pipe}Z{pipe} ≥ 2 in primary cosmic rays near the Earth. The results of the search for antihelium using data from the PAMELA experiment obtained from June 2006 to December 2009 are presented. No events with a charge of -2 have been detected in the rigidity range of 0.6-600 GV. An upper limit on the antihelium/helium flux ratio has been presented as a function of the energy. An integral upper level of 4.7 × 10-7 is the lowest limit at rigidities above 14 GV.

AB - The explanation of the observed baryon asymmetry, i.e., the almost complete absence of antimatter in the visible part of the universe, is one of the most important problems in cosmology. The real asymmetry value can be determined by direct measurements of the fluxes of antinuclei with charges {pipe}Z{pipe} ≥ 2 in primary cosmic rays near the Earth. The results of the search for antihelium using data from the PAMELA experiment obtained from June 2006 to December 2009 are presented. No events with a charge of -2 have been detected in the rigidity range of 0.6-600 GV. An upper limit on the antihelium/helium flux ratio has been presented as a function of the energy. An integral upper level of 4.7 × 10-7 is the lowest limit at rigidities above 14 GV.

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U2 - 10.1134/s0021364011110087

DO - 10.1134/s0021364011110087

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AN - SCOPUS:79961037312

SN - 0021-3640

VL - 93

SP - 628

EP - 631

JO - JETP Letters

JF - JETP Letters

IS - 11

ER -

Upper limit on the antihelium flux in primary cosmic rays

Abstract

Bibliographical note

Funding

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