Measurement of the e+e- → π+π-(γ) Cross Section with the ISR Method with BABAR

被引：7

作者：

Davier, Michel ^{[1
,2
]}

机构：

[1] CNRS, Lab Accelerateur Lineaire, IN2P3, F-91898 Orsay, France

[2] Univ Paris 11, F-91898 Orsay, France

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2009年 / 189卷

关键词：

PION FORM-FACTOR; RADIATIVE-CORRECTIONS; SPECTRAL FUNCTIONS; ENERGY-RANGE; TAU-DECAYS; FACTORIES;

D O I：

10.1016/j.nuclphysbps.2009.03.038

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A precision measurement of the cross section for the process e(+)e(-) -> pi(+)pi(-)(gamma) is presented with the radiative return method with the high statistics data accumulated by BABAR. at the gamma(4S). The luminosity is determined from the study of the corresponding leptonic process e(+)e(-) -> mu(+)mu(-)(gamma) thus cancelling several factors and reducing the overall systematic uncertainty. Trigger, tracking, particle identification, and kinematic-fit chi(2) efficiencies are evaluated from data in the same environment. Additional radiation from the initial and the final states is studied in both processes. The analysis covers the mass range between threshold and 5 GeV. Preliminary results are presented here between 0.5 and 3 GeV, with data samples of 513183 pion events and 445631 muon events. The systematic uncertainty in the main rho resonance region is 5.6 x 10(-3). The measured mass dependent pion-pair cross section is compared with measurements from earlier experiments and used to compute the hadronic vacuum polarization contribution from the dominant pi pi channel to the muon magnetic anomaly.

引用

页码：222 / 232

页数：11

共 33 条

[1] Update of the e+e- → π+π- Cross section measured by the spherical neutral detector in the energy region 400 < √s < 1000 MeV [J].

Achasov, M. N. ;

Beloborodov, K. I. ;

Berdyugin, A. V. ;

Bogdanchikov, A. G. ;

Bozhenok, A. V. ;

Bukin, A. D. ;

Bukin, D. A. ;

Dimova, T. V. ;

Druzhinin, V. P. ;

Golubev, V. B. ;

Korol, A. A. ;

Koshuba, S. V. ;

Pakhtusova, E. V. ;

Serednyakov, S. I. ;

Shatunov, Yu M. ;

Sidorov, V. A. ;

Silagadze, Z. K. ;

Skrinsky, A. N. ;

Tikhonov, Yu A. ;

vasiljev, A. V. .

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 2006, 103 (03) :380-384

[2]

Achasov MN, 2005, J EXP THEOR PHYS+, V101, P1053, DOI 10.1134/1.2163921

[3] High-statistics measurement of the pion form factor in the ρ-meson energy range with the CMD-2 detector [J].

Akhmetshin, R. R. ;

Aulchenko, V. M. ;

Banzarov, V. Sh. ;

Barkov, L. M. ;

Bashtovoy, N. S. ;

Bondar, A. E. ;

Bondarev, D. V. ;

Bragin, A. V. ;

Dhawan, S. K. ;

Eidelman, S. I. ;

Epifanov, D. A. ;

Fedotovich, G. V. ;

Gabyshev, N. I. ;

Gorbachev, D. A. ;

Grebenuk, A. A. ;

Grigoriev, D. N. ;

Hughes, V. W. ;

Ignatov, F. V. ;

Karpov, S. V. ;

Kazanin, V. F. ;

Khazin, B. I. ;

Koop, I. A. ;

Krokovny, P. P. ;

Kuzmin, A. S. ;

Logashenko, I. B. ;

Lukin, P. A. ;

Lysenko, A. P. ;

Mikhailov, K. Yu. ;

Miller, J. P. ;

Milshtein, A. I. ;

Nesterenko, I. N. ;

Nikulin, M. A. ;

Okhapkin, V. S. ;

Otboev, A. V. ;

Perevedentsev, E. A. ;

Popov, A. S. ;

Redin, S. I. ;

Roberts, B. L. ;

Root, N. I. ;

Ruban, A. A. ;

Ryskulov, N. M. ;

Shamov, A. G. ;

Shatunov, Yu. M. ;

Shwartz, B. A. ;

Sibidanov, A. L. ;

Sidorov, V. A. ;

Skrinsky, A. N. ;

Smakhtin, V. P. ;

Snopkov, I. G. ;

Solodov, E. P. .

PHYSICS LETTERS B, 2007, 648 (01) :28-38

[4] Measurement of σ(e+e- → π+π-γ) and extraction of σ(e+e- → π+π-) below 1 GeV with the KLOE detector [J].

Aloisio, A ;

Ambrosino, F ;

Antonelli, A ;

Antonelli, M ;

Bacci, C ;

Barva, M ;

Bencivenni, G ;

Bertolucci, S ;

Bini, C ;

Bloise, C ;

Bocci, V ;

Bossi, F ;

Branchini, P ;

Bulychjov, SA ;

Caloi, R ;

Campana, P ;

Capon, G ;

Capussela, T ;

Carboni, G ;

Ceradini, F ;

Cervelli, F ;

Cevenini, F ;

Chiefari, G ;

Ciambrone, P ;

Conetti, S ;

De Lucia, E ;

De Santis, A ;

De Simone, P ;

De Zorzi, G ;

Dell'Agnello, S ;

Denig, A ;

Di Domenico, A ;

Di Donato, C ;

Di Falco, S ;

Di Micco, B ;

Doria, A ;

Dreucci, M ;

Erriquez, O ;

Farilla, A ;

Felici, G ;

Ferrari, A ;

Ferrer, ML ;

Finocchiaro, G ;

Forti, C ;

Franzini, P ;

Gatti, C ;

Gauzzi, P ;

Giovannella, S ;

Gorini, E ;

Graziani, E .

PHYSICS LETTERS B, 2005, 606 (1-2) :12-24

[5]

ANDERSON S, 2000, PHYS REV D, V61

[6]

ARBUZOV AB, 1998, JHEP, V9812

[7] Study of e+e-→p(p)over-bar using initial state radiation with BABAR -: art. no. 012005 [J].

Aubert, B ;

Barate, R ;

Boutigny, D ;

Couderc, F ;

Karyotakis, Y ;

Lees, JP ;

Poireau, V ;

Tisserand, V ;

Zghiche, A ;

Grauges, E ;

Palano, A ;

Pappagallo, M ;

Pompili, A ;

Chen, JC ;

Qi, ND ;

Rong, G ;

Wang, P ;

Zhu, YS ;

Eigen, G ;

Ofte, I ;

Stugu, B ;

Abrams, GS ;

Battaglia, M ;

Best, DS ;

Brown, DN ;

Button-Shafer, J ;

Cahn, RN ;

Charles, E ;

Day, CT ;

Gill, MS ;

Gritsan, AV ;

Groysman, Y ;

Jacobsen, RG ;

Kadel, RW ;

Kadyk, JA ;

Kerth, LT ;

Kolomensky, YG ;

Kukartsev, G ;

Lynch, G ;

Mir, LM ;

Oddone, PJ ;

Orimoto, TJ ;

Pripstein, M ;

Roe, NA ;

Ronan, MT ;

Wenzel, WA ;

Barrett, M ;

Ford, KE ;

Harrison, TJ ;

Hart, AJ .

PHYSICAL REVIEW D, 2006, 73 (01)

[8]

Aubert B, 2004, PHYS REV D, V70, DOI [10.1103/PhysRevD.70.091103, 10.1103/PhysRevD.70.072004]

[9] The BABAR detector [J].

Aubert, B ;

Bazan, A ;

Boucham, A ;

Boutigny, D ;

De Bonis, I ;

Favier, J ;

Gaillard, JM ;

Jeremie, A ;

Karyotakis, Y ;

Le Flour, T ;

Lees, JP ;

Lieunard, S ;

Petitpas, P ;

Robbe, P ;

Tisserand, V ;

Zachariadou, K ;

Palano, A ;

Chen, GP ;

Chen, JC ;

Qi, ND ;

Rong, G ;

Wang, P ;

Zhu, YS ;

Eigen, G ;

Reinertsen, PL ;

Stugu, B ;

Abbott, B ;

Abrams, GS ;

Amerman, L ;

Borgland, AW ;

Breon, AB ;

Brown, DN ;

Button-Shafer, J ;

Clark, AR ;

Dardin, S ;

Day, C ;

Dow, SF ;

Fan, Q ;

Gaponenko, I ;

Gill, MS ;

Goozen, FR ;

Gowdy, SJ ;

Gritsan, A ;

Groysman, Y ;

Hernikl, C ;

Jacobsen, RG ;

Jared, RC ;

Kadel, RW ;

Kadyk, J ;

Karcher, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 479 (01) :1-116

[10]

Aul'chenko VM, 2006, JETP LETT+, V84, P413, DOI 10.1134/S0021264006200021

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