Measurement of additional radiation in the initial-state-radiation processes e+e−→μ+μ−γ and e+e−→π+π−γ at BABAR

Lees, J. .; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Brown, D. .; Kolomensky, Y. .; Fritsch, M.; Koch, H.; Cheaib, R.; Hearty, C.; Mattison, T. .; Mckenna, J. .; R.  Y., S.; Blinov, V. .; Buzykaev, A. .; Druzhinin, V. .; Kozyrev, E. .; Kravchenko, E. .; Serednyakov, S. .; Skovpen, Y. .; Solodov, E. .; Todyshev, K. .; Lankford, A. .; Dey, B.; Gary, J. .; Long, O.; Eisner, A. .; Lockman, W. .; Panduro Vazquez, W.; Chao, D. .; Cheng, C. .; Echenard, B.; Flood, K. .; Hitlin, D. .; Li, Y.; Lin, D. .; Middleton, S.; Miyashita, T. .; Ongmongkolkul, P.; Oyang, J.; Porter, F. .; Röhrken, M.; Meadows, B. .; Sokoloff, M. .; Smith, J. .; Wagner, S. .; Bernard, D.; Verderi, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Santoro, V.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Martellotti, S.; Patteri, P.; Peruzzi, I. .; Piccolo, M.; Rotondo, M.; Zallo, A.; Passaggio, S.; Patrignani, C.; Shuve, B. .; Lacker, H. .; Bhuyan, B.; Mallik, U.; Chen, C.; Cochran, J.; Prell, S.; Gritsan, A. .; Arnaud, N.; Bai, D.; Davier, M.; Le Diberder, F.; Li, L.; Lutz, A. .; Wormser, G.; Zhang, Z.; Lange, D. .; Wright, D. .; Coleman, J. .; Hutchcroft, D. .; Payne, D. .; Touramanis, C.; Bevan, A. .; Di Lodovico, F.; Cowan, G.; Banerjee, S.; Brown, D. .; Davis, C. .; Denig, A. .; Gradl, W.; Griessinger, K.; Hafner, A.; Schubert, K. .; Barlow, R. .; Lafferty, G. .; Cenci, R.; Jawahery, A.; Roberts, D. .; Cowan, R.; Robertson, S. .; Seddon, R. .; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Summers, D. .; De Nardo, G.; Sciacca, C.; Jessop, C. .; Losecco, J. .; Honscheid, K.; Gaz, A.; Margoni, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben-Haim, E.; Bomben, M.; Bonneaud, G. .; Calderini, G.; Chauveau, J.; Malaescu, B.; Marchiori, G.; Ocariz, J.; Biasini, M.; Manoni, E.; Rossi, A.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Chrzaszcz, M.; Forti, F.; Giorgi, M. .; Lusiani, A.; Oberhof, B.; Paoloni, E.; Rama, M.; Rizzo, G.; Walsh, J. .; Zani, L.; Smith, A. . .; Anulli, F.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Pilloni, A.; Bünger, C.; Dittrich, S.; Grünberg, O.; Leddig, T.; Voß, C.; Waldi, R.; Adye, T.; Wilson, F. .; Emery, S.; Vasseur, G.; Aston, D.; Cartaro, C.; Convery, M. .; Dunwoodie, W.; Ebert, M.; Field, R. .; Fulsom, B. .; Graham, M. .; Hast, C.; Kim, P.; Luitz, S.; Macfarlane, D. .; Muller, D. .; Neal, H.; Ratcliff, B. .; Roodman, A.; Sullivan, M. .; Va'Vra, J.; Wisniewski, W. .; Purohit, M. .; Wilson, J. .; Sekula, S. .; Ahmed, H.; Tasneem, N.; Bellis, M.; Burchat, P. .; Puccio, E. . .; Ernst, J. .; Gorodeisky, R.; Guttman, N.; Peimer, D. .; Soffer, A.; Spanier, S. .; Ritchie, J. .; Izen, J. .; Lou, X. .; Bianchi, F.; De Mori, F.; Filippi, A.; Lanceri, L.; Vitale, L.; Martinez-Vidal, F.; Oyanguren, A.; Albert, J.; Beaulieu, A.; Bernlochner, F. .; King, G. .; Kowalewski, R.; Lueck, T.; Miller, C.; Nugent, I. .; Roney, J. .; Sobie, R. .; Gershon, T. .; Harrison, P. .; Latham, T. .; S.  L., W.; Null, N.

doi:10.1103/physrevd.108.l111103

A dedicated measurement of additional radiation in e(+) e(-) -> mu(+) mu(-) gamma and e(+) e(-) -> pi(+) pi(-) gamma initial-state-radiation events is presented using the full BABAR data sample. For the first time results are presented at next-to- and next-to-next-to-leading order, with one and two additional photons, respectively, for radiation from the initial and final states. Comparison with predictions from PHOKHARA and AFKQED Monte Carlo generators is performed, revealing discrepancies in the one-photon rates and angular distributions for the former. This disagreement has a negligible effect on the BABAR measurement of the e(+) e(-) -> pi(+) pi(-) (gamma) cross section, but could affect other measurements significantly. This study sheds a new light on the longstanding discrepancy in this channel that affects the theoretical prediction of hadronic vacuum polarization contributions to the muon magnetic moment anomaly. (BABAR Collaboration)

Measurement of additional radiation in the initial-state-radiation processes e+e−→μ+μ−γ and e+e−→π+π−γ at BABAR / J. . Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. . Brown, Y. . Kolomensky, M. Fritsch, H. Koch, R. Cheaib, C. Hearty, T. . Mattison, J. . Mckenna, R. . So, V. . Blinov, A. . Buzykaev, V. . Druzhinin, E. . Kozyrev, E. . Kravchenko, S. . Serednyakov, Y. . Skovpen, E. . Solodov, K. . Todyshev, A. . Lankford, B. Dey, J. . Gary, O. Long, A. . Eisner, W. . Lockman, W. Panduro Vazquez, D. . Chao, C. . Cheng, B. Echenard, K. . Flood, D. . Hitlin, Y. Li, D. . Lin, S. Middleton, T. . Miyashita, P. Ongmongkolkul, J. Oyang, F. . Porter, M. Röhrken, B. . Meadows, M. . Sokoloff, J. . Smith, S. . Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, V. Santoro, A. Calcaterra, R. de Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. . Peruzzi, M. Piccolo, M. Rotondo, A. Zallo, S. Passaggio, C. Patrignani, B. . Shuve, H. . Lacker, B. Bhuyan, U. Mallik, C. Chen, J. Cochran, S. Prell, A. . Gritsan, N. Arnaud, D. Bai, M. Davier, F. Le Diberder, L. Li, A. . Lutz, G. Wormser, Z. Zhang, D. . Lange, D. . Wright, J. . Coleman, D. . Hutchcroft, D. . Payne, C. Touramanis, A. . Bevan, F. Di Lodovico, G. Cowan, S. Banerjee, D. . Brown, C. . Davis, A. . Denig, W. Gradl, K. Griessinger, A. Hafner, K. . Schubert, R. . Barlow, G. . Lafferty, R. Cenci, A. Jawahery, D. . Roberts, R. Cowan, S. . Robertson, R. . Seddon, N. Neri, F. Palombo, L. Cremaldi, R. Godang, D. . Summers, G. De Nardo, C. Sciacca, C. . Jessop, J. . Losecco, K. Honscheid, A. Gaz, M. Margoni, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. . Bonneaud, G. Calderini, J. Chauveau, B. Malaescu, G. Marchiori, J. Ocariz, M. Biasini, E. Manoni, A. Rossi, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, M. Chrzaszcz, F. Forti, M. . Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, M. Rama, G. Rizzo, J. . Walsh, L. Zani, A. . . Smith, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, A. Pilloni, C. Bünger, S. Dittrich, O. Grünberg, T. Leddig, C. Voß, R. Waldi, T. Adye, F. . Wilson, S. Emery, G. Vasseur, D. Aston, C. Cartaro, M. . Convery, W. Dunwoodie, M. Ebert, R. . Field, B. . Fulsom, M. . Graham, C. Hast, P. Kim, S. Luitz, D. . Macfarlane, D. . Muller, H. Neal, B. . Ratcliff, A. Roodman, M. . Sullivan, J. Va'Vra, W. . Wisniewski, M. . Purohit, J. . Wilson, S. . Sekula, H. Ahmed, N. Tasneem, M. Bellis, P. . Burchat, E. . . Puccio, J. . Ernst, R. Gorodeisky, N. Guttman, D. . Peimer, A. Soffer, S. . Spanier, J. . Ritchie, J. . Izen, X. . Lou, F. Bianchi, F. De Mori, A. Filippi, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, J. Albert, A. Beaulieu, F. . Bernlochner, G. . King, R. Kowalewski, T. Lueck, C. Miller, I. . Nugent, J. . Roney, R. . Sobie, T. . Gershon, P. . Harrison, T. . Latham, S. . Wu, N. Null. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 108:11(2023 Dec 21), pp. L111103.1-L111103.9. [10.1103/physrevd.108.l111103]

Measurement of additional radiation in the initial-state-radiation processes e+e−→μ+μ−γ and e+e−→π+π−γ at BABAR

Lees, J. P.;Poireau, V.;Tisserand, V.;Grauges, E.;Palano, A.;Eigen, G.;Brown, D. N.;Kolomensky, Yu. G.;Fritsch, M.;Koch, H.;Cheaib, R.;Hearty, C.;Mattison, T. S.;McKenna, J. A.;So, R. Y.;Blinov, V. E.;Buzykaev, A. R.;Druzhinin, V. P.;Kozyrev, E. A.;Kravchenko, E. A.;Serednyakov, S. I.;Skovpen, Yu. I.;Solodov, E. P.;Todyshev, K. Yu.;Lankford, A. J.;Dey, B.;Gary, J. W.;Long, O.;Eisner, A. M.;Lockman, W. S.;Panduro Vazquez, W.;Chao, D. S.;Cheng, C. H.;Echenard, B.;Flood, K. T.;Hitlin, D. G.;Li, Y.;Lin, D. X.;Middleton, S.;Miyashita, T. S.;Ongmongkolkul, P.;Oyang, J.;Porter, F. C.;Röhrken, M.;Meadows, B. T.;Sokoloff, M. D.;Smith, J. G.;Wagner, S. R.;Bernard, D.;Verderi, M.;Bettoni, D.;Bozzi, C.;Calabrese, R.;Cibinetto, G.;Fioravanti, E.;Garzia, I.;Luppi, E.;Santoro, V.;Calcaterra, A.;de Sangro, R.;Finocchiaro, G.;Martellotti, S.;Patteri, P.;Peruzzi, I. M.;Piccolo, M.;Rotondo, M.;Zallo, A.;Passaggio, S.;Patrignani, C.;Shuve, B. J.;Lacker, H. M.;Bhuyan, B.;Mallik, U.;Chen, C.;Cochran, J.;Prell, S.;Gritsan, A. V.;Arnaud, N.;Bai, D.;Davier, M.;Le Diberder, F.;Li, L.;Lutz, A. M.;Wormser, G.;Zhang, Z.;Lange, D. J.;Wright, D. M.;Coleman, J. P.;Hutchcroft, D. E.;Payne, D. J.;Touramanis, C.;Bevan, A. J.;Di Lodovico, F.;Cowan, G.;Banerjee, Sw.;Brown, D. N.;Davis, C. L.;Denig, A. G.;Gradl, W.;Griessinger, K.;Hafner, A.;Schubert, K. R.;Barlow, R. J.;Lafferty, G. D.;Cenci, R.;Jawahery, A.;Roberts, D. A.;Cowan, R.;Robertson, S. H.;Seddon, R. M.;N. Neri;F. Palombo;Cremaldi, L.;Godang, R.;Summers, D. J.;De Nardo, G.;Sciacca, C.;Jessop, C. P.;LoSecco, J. M.;Honscheid, K.;Gaz, A.;Margoni, M.;Simi, G.;F. Simonetto;Stroili, R.;Akar, S.;Ben-Haim, E.;Bomben, M.;Bonneaud, G. R.;Calderini, G.;Chauveau, J.;Malaescu, B.;Marchiori, G.;Ocariz, J.;Biasini, M.;Manoni, E.;Rossi, A.;Batignani, G.;Bettarini, S.;Carpinelli, M.;Casarosa, G.;Chrzaszcz, M.;Forti, F.;Giorgi, M. A.;Lusiani, A.;Oberhof, B.;Paoloni, E.;Rama, M.;Rizzo, G.;Walsh, J. J.;Zani, L.;Smith, A. J. S.;Anulli, F.;Faccini, R.;Ferrarotto, F.;Ferroni, F.;Pilloni, A.;Bünger, C.;Dittrich, S.;Grünberg, O.;Leddig, T.;Voß, C.;Waldi, R.;Adye, T.;Wilson, F. F.;Emery, S.;Vasseur, G.;Aston, D.;Cartaro, C.;Convery, M. R.;Dunwoodie, W.;Ebert, M.;Field, R. C.;Fulsom, B. G.;Graham, M. T.;Hast, C.;Kim, P.;Luitz, S.;MacFarlane, D. B.;Muller, D. R.;Neal, H.;Ratcliff, B. N.;Roodman, A.;Sullivan, M. K.;Va'vra, J.;Wisniewski, W. J.;Purohit, M. V.;Wilson, J. R.;Sekula, S. J.;Ahmed, H.;Tasneem, N.;Bellis, M.;Burchat, P. R.;Puccio, E. M. T.;Ernst, J. A.;Gorodeisky, R.;Guttman, N.;Peimer, D. R.;Soffer, A.;Spanier, S. M.;Ritchie, J. L.;Izen, J. M.;Lou, X. C.;Bianchi, F.;De Mori, F.;Filippi, A.;Lanceri, L.;Vitale, L.;Martinez-Vidal, F.;Oyanguren, A.;Albert, J.;Beaulieu, A.;Bernlochner, F. U.;King, G. J.;Kowalewski, R.;Lueck, T.;Miller, C.;Nugent, I. M.;Roney, J. M.;Sobie, R. J.;Gershon, T. J.;Harrison, P. F.;Latham, T. E.;Wu, S. L.;null, null

2023

Abstract

A dedicated measurement of additional radiation in e(+) e(-) -> mu(+) mu(-) gamma and e(+) e(-) -> pi(+) pi(-) gamma initial-state-radiation events is presented using the full BABAR data sample. For the first time results are presented at next-to- and next-to-next-to-leading order, with one and two additional photons, respectively, for radiation from the initial and final states. Comparison with predictions from PHOKHARA and AFKQED Monte Carlo generators is performed, revealing discrepancies in the one-photon rates and angular distributions for the former. This disagreement has a negligible effect on the BABAR measurement of the e(+) e(-) -> pi(+) pi(-) (gamma) cross section, but could affect other measurements significantly. This study sheds a new light on the longstanding discrepancy in this channel that affects the theoretical prediction of hadronic vacuum polarization contributions to the muon magnetic moment anomaly. (BABAR Collaboration)

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				Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
			
	Data di pubblicazione
	
				21-dic-2023
			
	Rivista in ANCE
	
				PHYSICAL REVIEW D
			
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				https://dx.doi.org/10.1103/physrevd.108.l111103
			
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				01 - Articolo su periodico

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