The photon polarization in b→sγ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of Λb0→Λγ decays. A data sample corresponding to an integrated luminosity of 6 fb-1 collected by the LHCb experiment in pp collisions at a center-of-mass energy of 13 TeV is used. The photon polarization is measured to be αγ=0.82-0.26-0.13+0.17+0.04, where the first uncertainty is statistical and the second systematic. This result is in agreement with the Standard Model prediction and previous measurements in b-meson decays. Charge-parity breaking effects are studied for the first time in this observable and found to be consistent with CP symmetry.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Measurement of the photon polarization in Λb0 → Λγ decays. PHYSICAL REVIEW D, 105(5) [10.1103/PhysRevD.105.L051104].

Measurement of the photon polarization in Λb0 → Λγ decays

Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Martinazzoli L.;Martinelli M.;Meloni S.;Minotti A.;Petruzzo M.;Pizzichemi M.;Shields E. B.;
2022

Abstract

The photon polarization in b→sγ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of Λb0→Λγ decays. A data sample corresponding to an integrated luminosity of 6 fb-1 collected by the LHCb experiment in pp collisions at a center-of-mass energy of 13 TeV is used. The photon polarization is measured to be αγ=0.82-0.26-0.13+0.17+0.04, where the first uncertainty is statistical and the second systematic. This result is in agreement with the Standard Model prediction and previous measurements in b-meson decays. Charge-parity breaking effects are studied for the first time in this observable and found to be consistent with CP symmetry.
Articolo in rivista - Articolo scientifico
Leptons; Mesons; Deterioration;
English
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Measurement of the photon polarization in Λb0 → Λγ decays. PHYSICAL REVIEW D, 105(5) [10.1103/PhysRevD.105.L051104].
Aaij, R; Abdelmotteleb, A; Abellan Beteta, C; Abudinen, F; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Agapopoulou, C; Aidala, C; Aiola, S; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Aliouche, Z; Alkhazov, G; Alvarez Cartelle, P; Amato, S; Amey, J; Amhis, Y; An, L; Anderlini, L; Andreianov, A; Andreotti, M; Archilli, F; Artamonov, A; Artuso, M; Arzymatov, K; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, J; Baladron Rodriguez, P; Balagura, V; Baldini, W; Baptista Leite, J; Barbetti, M; Barlow, R; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, J; Bashir, S; Bassi, G; Batsukh, B; Battig, A; Bay, A; Beck, A; Becker, M; Bedeschi, F; Bediaga, I; Beiter, A; Belavin, V; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Berninghoff, D; Bernstein, H; Bertella, C; Bertolin, A; Betancourt, C; Betti, F; Bezshyiko, I; Bhasin, S; Bhom, J; Bian, L; Bieker, M; Bifani, S; Billoir, P; Birch, M; Bishop, F; Bitadze, A; Bizzeti, A; Bjorn, M; Blago, M; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Boelhauve, J; Boente Garcia, O; Boettcher, T; Boldyrev, A; Bondar, A; Bondar, N; Borghi, S; Borisyak, M; Borsato, M; Borsuk, J; Bouchiba, S; Bowcock, T; Boyer, A; Bozzi, C; Bradley, M; Braun, S; Brea Rodriguez, A; Brodzicka, J; Brossa Gonzalo, A; Brundu, D; Buonaura, A; Buonincontri, L; Burke, A; Burr, C; Bursche, A; Butkevich, A; Butter, J; Buytaert, J; Byczynski, W; Cadeddu, S; Cai, H; Calabrese, R; Calefice, L; Calero Diaz, L; Cali, S; Calladine, R; Calvi, M; Calvo Gomez, M; Camargo Magalhaes, P; Campana, P; Campoverde Quezada, A; Capelli, S; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carli, I; Carniti, P; Carus, L; Carvalho Akiba, K; Casais Vidal, A; Casse, G; Cattaneo, M; Cavallero, G; Celani, S; Cerasoli, J; Cervenkov, D; Chadwick, A; Chapman, M; Charles, M; Charpentier, P; Chatzikonstantinidis, G; Chavez Barajas, C; Chefdeville, M; Chen, C; Chen, S; Chernov, A; Chobanova, V; Cholak, S; Chrzaszcz, M; Chubykin, A; Chulikov, V; Ciambrone, P; Cicala, M; Cid Vidal, X; Ciezarek, G; Clarke, P; Clemencic, M; Cliff, H; Closier, J; Cobbledick, J; Coco, V; Coelho, J; Cogan, J; Cogneras, E; Cojocariu, L; Collins, P; Colombo, T; Congedo, L; Contu, A; Cooke, N; Coombs, G; Corredoira, I; Corti, G; Costa Sobral, C; Couturier, B; Craik, D; Crkovska, J; Cruz Torres, M; Currie, R; Da Silva, C; Dadabaev, S; Dai, L; Dall'Occo, E; Dalseno, J; D'Ambrosio, C; Danilina, A; D'Argent, P; Davies, J; Davis, A; De Aguiar Francisco, O; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, J; De Paula, L; De Serio, M; De Simone, D; De Simone, P; De Vellis, F; De Vries, J; Dean, C; Debernardis, F; Decamp, D; Dedu, V; Del Buono, L; Delaney, B; Dembinski, H; Dendek, A; Denysenko, V; Derkach, D; Deschamps, O; Desse, F; Dettori, F; Dey, B; Di Cicco, A; Di Nezza, P; Didenko, S; Dieste Maronas, L; Dijkstra, H; Dobishuk, V; Dong, C; Donohoe, A; Dordei, F; Dos Reis, A; Douglas, L; Dovbnya, A; Downes, A; Dudek, M; Dufour, L; Duk, V; Durante, P; Durham, J; Dutta, D; Dziurda, A; Dzyuba, A; Easo, S; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Ek-In, S; Eklund, L; Ely, S; Ene, A; Epple, E; Escher, S; Eschle, J; Esen, S; Evans, T; Falabella, A; Fan, J; Fan, Y; Fang, B; Farry, S; Fazzini, D; Feo, M; Fernandez Prieto, A; Fernez, A; Ferrari, F; Ferreira Lopes, L; Ferreira Rodrigues, F; Ferreres Sole, S; Ferrillo, M; Ferro-Luzzi, M; Filippov, S; Fini, R; Fiorini, M; Firlej, M; Fischer, K; Fitzgerald, D; Fitzpatrick, C; Fiutowski, T; Fkiaras, A; Fleuret, F; Fontana, M; Fontanelli, F; Forty, R; Foulds-Holt, D; Franco Lima, V; Franco Sevilla, M; Frank, M; Franzoso, E; Frau, G; Frei, C; Friday, D; Fu, J; Fuehring, Q; Gabriel, E; Galati, G; Gallas Torreira, A; Galli, D; Gambetta, S; Gan, Y; Gandelman, M; Gandini, P; Gao, Y; Garau, M; Garcia Martin, L; Garcia Moreno, P; Garcia Pardinas, J; Garcia Plana, B; Garcia Rosales, F; Garrido, L; Gaspar, C; Geertsema, R; Gerick, D; Gerken, L; Gersabeck, E; Gersabeck, M; Gershon, T; Gerstel, D; Giambastiani, L; Gibson, V; Giemza, H; Gilman, A; Giovannetti, M; Gioventu, A; Gironella Gironell, P; Giubega, L; Giugliano, C; Gizdov, K; Gkougkousis, E; Gligorov, V; Gobel, C; Golobardes, E; Golubkov, D; Golutvin, A; Gomes, A; Gomez Fernandez, S; Goncalves Abrantes, F; Goncerz, M; Gong, G; Gorbounov, P; Gorelov, I; Gotti, C; Govorkova, E; Grabowski, J; Grammatico, T; Granado Cardoso, L; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greeven, L; Grieser, N; Grillo, L; Gromov, S; Gruberg Cazon, B; Gu, C; Guarise, M; Guittiere, M; Gunther, P; Gushchin, E; Guth, A; Guz, Y; Gys, T; Hadavizadeh, T; Haefeli, G; Haen, C; Haimberger, J; Halewood-Leagas, T; Hamilton, P; Hammerich, J; Han, Q; Han, X; Hancock, T; Hansen, E; Hansmann-Menzemer, S; Harnew, N; Harrison, T; Hasse, C; Hatch, M; He, J; Hecker, M; Heijhoff, K; Heinicke, K; Hennequin, A; Hennessy, K; Henry, L; Heuel, J; Hicheur, A; Hill, D; Hilton, M; Hollitt, S; Hou, R; Hou, Y; Hu, J; Hu, J; Hu, W; Hu, X; Huang, W; Huang, X; Hulsbergen, W; Hunter, R; Hushchyn, M; Hutchcroft, D; Hynds, D; Ibis, P; Idzik, M; Ilin, D; Ilten, P; Inglessi, A; Ishteev, A; Ivshin, K; Jacobsson, R; Jage, H; Jakobsen, S; Jans, E; Jashal, B; Jawahery, A; Jevtic, V; Jiang, F; John, M; Johnson, D; Jones, C; Jones, T; Jost, B; Jurik, N; Kalavan Kadavath, S; Kandybei, S; Kang, Y; Karacson, M; Karpov, M; Keizer, F; Keller, D; Kenzie, M; Ketel, T; Khanji, B; Kharisova, A; Kholodenko, S; Kirn, T; Kirsebom, V; Kitouni, O; Klaver, S; Kleijne, N; Klimaszewski, K; Kmiec, M; Koliiev, S; Kondybayeva, A; Konoplyannikov, A; Kopciewicz, P; Kopecna, R; Koppenburg, P; Korolev, M; Kostiuk, I; Kot, O; Kotriakhova, S; Kravchenko, P; Kravchuk, L; Krawczyk, R; Kreps, M; Kress, F; Kretzschmar, S; Krokovny, P; Krupa, W; Krzemien, W; Kucharczyk, M; Kudryavtsev, V; Kuindersma, H; Kunde, G; Kvaratskheliya, T; Lacarrere, D; Lafferty, G; Lai, A; Lampis, A; Lancierini, D; Lane, J; Lane, R; Lanfranchi, G; Langenbruch, C; Langer, J; Lantwin, O; Latham, T; Lazzari, F; Le Gac, R; Lee, S; Lefevre, R; Leflat, A; Legotin, S; Leroy, O; Lesiak, T; Leverington, B; Li, H; Li, P; Li, S; Li, Y; Li, Z; Liang, X; Lin, T; Lindner, R; Lisovskyi, V; Litvinov, R; Liu, G; Liu, H; Liu, Q; Liu, S; Lobo Salvia, A; Loi, A; Lomba Castro, J; Longstaff, I; Lopes, J; Lopez Solino, S; Lovell, G; Lu, Y; Lucarelli, C; Lucchesi, D; Luchuk, S; Lucio Martinez, M; Lukashenko, V; Luo, Y; Lupato, A; Luppi, E; Lupton, O; Lusiani, A; Lyu, X; Ma, L; Ma, R; Maccolini, S; Machefert, F; Maciuc, F; Macko, V; Mackowiak, P; Maddrell-Mander, S; Madejczyk, O; Madhan Mohan, L; Maev, O; Maevskiy, A; Maisuzenko, D; Majewski, M; Malczewski, J; Malde, S; Malecki, B; Malinin, A; Maltsev, T; Malygina, H; Manca, G; Mancinelli, G; Manuzzi, D; Marangotto, D; Maratas, J; Marchand, J; Marconi, U; Mariani, S; Marin Benito, C; Marinangeli, M; Marks, J; Marshall, A; Marshall, P; Martelli, G; Martellotti, G; Martinazzoli, L; Martinelli, M; Martinez Santos, D; Martinez Vidal, F; Massafferri, A; Materok, M; Matev, R; Mathad, A; Matiunin, V; Matteuzzi, C; Mattioli, K; Mauri, A; Maurice, E; Mauricio, J; Mazurek, M; Mccann, M; Mcconnell, L; Mcgrath, T; Mchugh, N; Mcnab, A; Mcnulty, R; Mead, J; Meadows, B; Meier, G; Meinert, N; Melnychuk, D; Meloni, S; Merk, M; Merli, A; Meyer Garcia, L; Mikhasenko, M; Milanes, D; Millard, E; Milovanovic, M; Minard, M; Minotti, A; Minzoni, L; Mitchell, S; Mitreska, B; Mitzel, D; Modden, A; Mohammed, R; Moise, R; Mokhnenko, S; Mombacher, T; Monroy, I; Monteil, S; Morandin, M; Morello, G; Morello, M; Moron, J; Morris, A; Morris, A; Mountain, R; Mu, H; Muheim, F; Mulder, M; Muller, D; Muller, K; Murphy, C; Murray, D; Muzzetto, P; Naik, P; Nakada, T; Nandakumar, R; Nanut, T; Nasteva, I; Needham, M; Neri, I; Neri, N; Neubert, S; Neufeld, N; Newcombe, R; Niel, E; Nieswand, S; Nikitin, N; Nolte, N; Normand, C; Nunez, C; Oblakowska-Mucha, A; Obraztsov, V; Oeser, T; O'Hanlon, D; Okamura, S; Oldeman, R; Oliva, F; Olivares, M; Onderwater, C; O'Neil, R; Otalora Goicochea, J; Ovsiannikova, T; Owen, P; Oyanguren, A; Padeken, K; Pagare, B; Pais, P; Pajero, T; Palano, A; Palutan, M; Pan, Y; Panshin, G; Papanestis, A; Pappagallo, M; Pappalardo, L; Pappenheimer, C; Parker, W; Parkes, C; Passalacqua, B; Passaleva, G; Pastore, A; Patel, M; Patrignani, C; Pawley, C; Pearce, A; Pellegrino, A; Pepe Altarelli, M; Perazzini, S; Pereima, D; Pereiro Castro, A; Perret, P; Petric, M; Petridis, K; Petrolini, A; Petrov, A; Petrucci, S; Petruzzo, M; Pham, T; Philippov, A; Pica, L; Piccini, M; Pietrzyk, B; Pietrzyk, G; Pili, M; Pinci, D; Pisani, F; Pizzichemi, M; P. K, R; Placinta, V; Plews, J; Plo Casasus, M; Polci, F; Poli Lener, M; Poliakova, M; Poluektov, A; Polukhina, N; Polyakov, I; Polycarpo, E; Ponce, S; Popov, D; Popov, S; Poslavskii, S; Prasanth, K; Promberger, L; Prouve, C; Pugatch, V; Puill, V; Pullen, H; Punzi, G; Qi, H; Qian, W; Qin, J; Qin, N; Quagliani, R; Quintana, B; Raab, N; Rabadan Trejo, R; Rachwal, B; Rademacker, J; Rama, M; Ramos Pernas, M; Rangel, M; Ratnikov, F; Raven, G; Reboud, M; Redi, F; Reiss, F; Remon Alepuz, C; Ren, Z; Renaudin, V; Ribatti, R; Ricciardi, S; Rinnert, K; Robbe, P; Robertson, G; Rodrigues, A; Rodrigues, E; Rodriguez Lopez, J; Rodriguez Rodriguez, E; Rollings, A; Roloff, P; Romanovskiy, V; Romero Lamas, M; Romero Vidal, A; Roth, J; Rotondo, M; Rudolph, M; Ruf, T; Ruiz Fernandez, R; Ruiz Vidal, J; Ryzhikov, A; Ryzka, J; Saborido Silva, J; Sagidova, N; Sahoo, N; Saitta, B; Salomoni, M; Sanchez Gras, C; Santacesaria, R; Santamarina Rios, C; Santimaria, M; Santovetti, E; Saranin, D; Sarpis, G; Sarpis, M; Sarti, A; Satriano, C; Satta, A; Saur, M; Savrina, D; Sazak, H; Scantlebury Smead, L; Scarabotto, A; Schael, S; Scherl, S; Schiller, M; Schindler, H; Schmelling, M; Schmidt, B; Schmitt, S; Schneider, O; Schopper, A; Schubiger, M; Schulte, S; Schune, M; Schwemmer, R; Sciascia, B; Sellam, S; Semennikov, A; Senghi Soares, M; Sergi, A; Serra, N; Sestini, L; Seuthe, A; Shang, Y; Shangase, D; Shapkin, M; Shchemerov, I; Shchutska, L; Shears, T; Shekhtman, L; Shen, Z; Shevchenko, V; Shields, E; Shimizu, Y; Shmanin, E; Shupperd, J; Siddi, B; Silva Coutinho, R; Simi, G; Simone, S; Skidmore, N; Skwarnicki, T; Slater, M; Slazyk, I; Smallwood, J; Smeaton, J; Smetkina, A; Smith, E; Smith, M; Snoch, A; Soares, M; Soares Lavra, L; Sokoloff, M; Soler, F; Solovev, A; Solovyev, I; Souza De Almeida, F; Souza De Paula, B; Spaan, B; Spadaro Norella, E; Spradlin, P; Stagni, F; Stahl, M; Stahl, S; Stanislaus, S; Steinkamp, O; Stenyakin, O; Stevens, H; Stone, S; Straticiuc, M; Strekalina, D; Suljik, F; Sun, J; Sun, L; Sun, Y; Svihra, P; Swallow, P; Swientek, K; Szabelski, A; Szumlak, T; Szymanski, M; Taneja, S; Tanner, A; Tat, M; Terentev, A; Teubert, F; Thomas, E; Thompson, D; Thomson, K; Tisserand, V; T'Jampens, S; Tobin, M; Tomassetti, L; Tong, X; Torres MacHado, D; Tou, D; Trifonova, E; Trippl, C; Tuci, G; Tully, A; Tuning, N; Ukleja, A; Unverzagt, D; Ursov, E; Usachov, A; Ustyuzhanin, A; Uwer, U; Vagner, A; Vagnoni, V; Valassi, A; Valenti, G; Valls Canudas, N; Van Beuzekom, M; Van Dijk, M; Van Hecke, H; Van Herwijnen, E; Van Hulse, C; Van Veghel, M; Vazquez Gomez, R; Vazquez Regueiro, P; Vazquez Sierra, C; Vecchi, S; Velthuis, J; Veltri, M; Venkateswaran, A; Veronesi, M; Vesterinen, M; Vieira, D; Vieites Diaz, M; Viemann, H; Vilasis-Cardona, X; Vilella Figueras, E; Villa, A; Vincent, P; Volle, F; Vom Bruch, D; Vorobyev, A; Vorobyev, V; Voropaev, N; Vos, K; Waldi, R; Walsh, J; Wang, C; Wang, J; Wang, J; Wang, J; Wang, J; Wang, M; Wang, R; Wang, Y; Wang, Z; Wang, Z; Wang, Z; Ward, J; Watson, N; Weber, S; Websdale, D; Weisser, C; Westhenry, B; White, D; Whitehead, M; Wiederhold, A; Wiedner, D; Wilkinson, G; Wilkinson, M; Williams, I; Williams, M; Williams, M; Wilson, F; Wislicki, W; Witek, M; Witola, L; Wormser, G; Wotton, S; Wu, H; Wyllie, K; Xiang, Z; Xiao, D; Xie, Y; Xu, A; Xu, J; Xu, L; Xu, M; Xu, Q; Xu, Z; Xu, Z; Yang, D; Yang, S; Yang, Y; Yang, Z; Yang, Z; Yao, Y; Yeomans, L; Yin, H; Yu, J; Yuan, X; Yushchenko, O; Zaffaroni, E; Zavertyaev, M; Zdybal, M; Zenaiev, O; Zeng, M; Zhang, D; Zhang, L; Zhang, S; Zhang, S; Zhang, Y; Zhang, Y; Zharkova, A; Zhelezov, A; Zheng, Y; Zhou, T; Zhou, X; Zhou, Y; Zhovkovska, V; Zhu, X; Zhu, X; Zhu, Z; Zhukov, V; Zonneveld, J; Zou, Q; Zucchelli, S; Zuliani, D; Zunica, G
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/372890
Citazioni
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
Social impact