- Main
Observation of X (3872) production in pp collisions at √s =7 TeV
- Aaij, R;
- Beteta, CA;
- Adeva, B;
- Adinolfi, M;
- Adrover, C;
- Affolder, A;
- Ajaltouni, Z;
- Albrecht, J;
- Alessio, F;
- Alexander, M;
- Alkhazov, G;
- Cartelle, PA;
- Alves, AA;
- Amato, S;
- Amhis, Y;
- Anderson, J;
- Appleby, RB;
- Gutierrez, OA;
- Archilli, F;
- Arrabito, L;
- Artamonov, A;
- Artuso, M;
- Aslanides, E;
- Auriemma, G;
- Bachmann, S;
- Back, JJ;
- Bailey, DS;
- Balagura, V;
- Baldini, W;
- Barlow, RJ;
- Barschel, C;
- Barsuk, S;
- Barter, W;
- Bates, A;
- Bauer, C;
- Bauer, T;
- Bay, A;
- Bediaga, I;
- Belogurov, S;
- Belous, K;
- Belyaev, I;
- Ben-Haim, E;
- Benayoun, M;
- Bencivenni, G;
- Benson, S;
- Benton, J;
- Bernet, R;
- Bettler, MO;
- Van Beuzekom, M;
- Bien, A;
- Bifani, S;
- Bird, T;
- Bizzeti, A;
- Bjørnstad, PM;
- Blake, T;
- Blanc, F;
- Blanks, C;
- Blouw, J;
- Blusk, S;
- Bobrov, A;
- Bocci, V;
- Bondar, A;
- Bondar, N;
- Bonivento, W;
- Borghi, S;
- Borgia, A;
- Bowcock, TJV;
- Bozzi, C;
- Brambach, T;
- Van Den Brand, J;
- Bressieux, J;
- Brett, D;
- Britsch, M;
- Britton, T;
- Brook, NH;
- Brown, H;
- Büchler-Germann, A;
- Burducea, I;
- Bursche, A;
- Buytaert, J;
- Cadeddu, S;
- Callot, O;
- Calvi, M;
- Calvogomez, M;
- Camboni, A;
- Campana, P;
- Carbone, A;
- Carboni, G;
- Cardinale, R;
- Cardini, A;
- Carson, L;
- Akiba, KC;
- Casse, G;
- Cattaneo, M;
- Cauet, C;
- Charles, M;
- Charpentier, P;
- Chiapolini, N;
- Ciba, K;
- Vidal, XC
- et al.
Published Web Location
https://doi.org/10.1140/epjc/s10052-012-1972-7Abstract
Using 34.7 pb−1of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at √s = 7 TeV is observed for the first time. Candidates are selected in the X(3872)→J/ψπ+π−decay mode, and used to measure σ(pp→X(3872)+anything)B(X(3872)→J/ψπ+π−) = 5.4 ± 1.3 (stat) ± 0.8 (syst) nb, where σ(pp →X(3872) + anything) is the inclusive production cross section of X(3872) mesons with rapidity in the range 2.5–4.5 and transverse momentum in the range 5–20 GeV/c. In addition the masses of both the X(3872) and ψ(2S) mesons, reconstructed in the J/ψπ+π−final state, are measured to be mX(3872) = 3871.95 ± 0.48 (stat) ± 0.12 (syst) MeV/c2and mψ(2S) = 3686.12± 0.06 (stat) ± 0.10 (syst) MeV/c2.
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