Measurement of the photon polarization in Lambda(0)(b) -> Lambda gamma decays

Aaij, R; Abdelmotteleb, Asw; Beteta, Ca; Abudinen, F; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Agapopoulou, C; Aidala, Ca; Aiola, S; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Aliouche, Z; Alkhazov, G; Cartelle, Pa; Amato, S; Amey, Jl; 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, Jj; Baladron Rodriguez, P; Balagura, V; Baldini, W; Leite, Jb; Barbetti, M; Barlow, Rj; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, Jm; 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, Hc; Bertella, C; Bertolin, A; Betancourt, C; Betti, F; Bezshyiko, I; Bhasin, S; Bhom, J; Bian, L; Bieker, Ms; Bifani, S; Billoir, P; Birch, M; Bishop, Fcr; Bitadze, A; Bizzeti, A; Bjorn, M; Blago, Mp; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Boelhauve, Ja; Boente Garcia, O; Boettcher, T; Boldyrev, A; Bondar, A; Bondar, N; Borghi, S; Borisyak, M; Borsato, M; Borsuk, Jt; Bouchiba, Sa; Bowcock, Tj; V,; Boyer, A; Bozzi, C; Bradley, Mj; Braun, S; Brea Rodriguez, A; Brodzicka, J; Gonzalo, Ab; Brundu, D; Buonaura, A; Buonincontri, L; Burke, At; Burr, C; Bursche, A; Butkevich, A; Butter, Js; Buytaert, J; Byczynski, W; Cadeddu, S; Cai, H; Calabrese, R; Calefice, L; Diaz, Lc; Cali, S; Calladine, R; Calvi, M; Calvo Gomez, M; Magalhaes, Pc; Campana, P; Quezada, Afc; Capelli, S; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carli, I; Carniti, P; Carus, L; Akiba, Kc; Casais Vidal, A; Casse, G; Cattaneo, M; Cavallero, G; Celani, S; Cerasoli, J; Cervenkov, D; Chadwick, Aj; Chapman, Mg; Charles, M; Charpentier, P; Chatzikonstantinidis, G; Barajas, Cac; Chefdeville, M; Chen, C; Chen, S; Chernov, A; Chobanova, V; Cholak, S; Chrzaszcz, M; Chubykin, A; Chulikov, V; Ciambrone, P; Cicala, Mf; Cid Vidal, X; Ciezarek, G; Clarke, Pel; Clemencic, M; Cliff, H; V,; Closier, J; Cobbledick, Jl; Coco, V; Coelho, Jab; Cogan, J; Cogneras, E; Cojocariu, L; Collins, P; Colombo, T; Congedo, L; Contu, A; Cooke, N; Coombs, G; Corredoira, I; Corti, G; Sobral, Cmc; Couturier, B; Craik, Dc; Crkovska, J; Torres, Mc; Currie, R; Da Silva, Cl; Dadabaev, S; Dai, L; Dall'Occo, E; Dalseno, J; D'Ambrosio, C; Danilina, A; D'Argent, P; Davies, Je; Davis, A; Francisco, Oda; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, Jm; De Paula, L; De Serio, M; De Simone, D; De Simone, P; De Vellis, F; de Vries, Ja; Dean, Ct; 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, Am; Dordei, F; dos Reis, Ac; Douglas, L; Dovbnya, A; Downes, Ag; Dudek, Mw; Dufour, L; Duk, V; Durante, P; Durham, Jm; 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, Ad; Ferrari, F; Lopes, Lf; Rodrigues, Ff; Sole, Sf; Ferrillo, M; Ferro-Luzzi, M; Filippov, S; Fini, Ra; Fiorini, M; Firlej, M; Fischer, Km; Fitzgerald, Ds; Fitzpatrick, C; Fiutowski, T; Fkiaras, A; Fleuret, F; Fontana, M; Fontanelli, F; Forty, R; Foulds-Holt, D; Lima, Vf; Sevilla, Mf; Frank, M; Franzoso, E; Frau, G; Frei, C; Friday, Da; 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; Martin, Lmg; Garcia Moreno, P; Pardinas, Jg; Garcia Plana, B; Rosales, Fag; Garrido, L; Gaspar, C; Geertsema, Re; Gerick, D; Gerken, Ll; Gersabeck, E; Gersabeck, M; Gershon, T; Gerstel, D; Giambastiani, L; Gibson, V; Giemza, Hk; Gilman, Al; Giovannetti, M; Gioventu, A; Gironella Gironell, P; Giubega, L; Giugliano, C; Gizdov, K; Gkougkousis, El; Gligorov, Vv; Gobel, C; Golobardes, E; Golubkov, D; Golutvin, A; Gomes, A; Gomez Fernandez, S; Abrantes, Fg; Goncerz, M; Gong, G; Gorbounov, P; Gorelov, I; V,; Gotti, C; Govorkova, E; Grabowski, Jp; Grammatico, T; Cardoso, Lag; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greeven, Lm; Grieser, Na; Grillo, L; Gromov, S; Cazon, Brg; Gu, C; Guarise, M; Guittiere, M; Gunther, Pa; Gushchin, E; Guth, A; Guz, Y; Gys, T; Hadavizadeh, T; Haefeli, G; Haen, C; Haimberger, J; Halewood-leagas, T; Hamilton, Pm; Hammerich, Jp; Han, Q; Han, X; Hancock, Th; Hansen, Eb; Hansmann-Menzemer, S; Harnew, N; Harrison, T; Hasse, C; Hatch, M; He, J; Hecker, M; Heijhoff, K; Heinicke, K; Hennequin, Am; Hennessy, K; Henry, L; Heuel, J; Hicheur, A; Hill, D; Hilton, M; Hollitt, Se; Hou, R; Hou, Y; Hu, J; Hu, J; Hu, W; Hu, X; Huang, W; Huang, X; Hulsbergen, W; Hunter, Rj; 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, Bk; Jawahery, A; Jevtic, V; Jiang, F; John, M; Johnson, D; Jones, Cr; Jones, Tp; Jost, B; Jurik, N; Kadavath, Shk; Kandybei, S; Kang, Y; Karacson, M; Karpov, M; Keizer, F; Keller, Dm; Kenzie, M; Ketel, T; Khanji, B; Kharisova, A; Kholodenko, S; Kirn, T; Kirsebom, Vs; Kitouni, O; Klaver, S; Kleijne, N; Klimaszewski, K; Kmiec, Mr; 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, Rd; Kreps, M; Kress, F; Kretzschmar, S; Krokovny, P; Krupa, W; Krzemien, W; Kucharczyk, M; Kudryavtsev, V; Kuindersma, Hs; Kunde, Gj; Kvaratskheliya, T; Lacarrere, D; Lafferty, G; Lai, A; Lampis, A; Lancierini, D; Lane, Jj; Lane, R; Lanfranchi, G; Langenbruch, C; Langer, J; Lantwin, O; Latham, T; Lazzari, F; Le Gac, R; Lee, Sh; Lefevre, R; Leflat, A; Legotin, S; Leroy, O; Lesiak, T; Leverington, B; Li, H; Li, P; Li, S; Li, Y; 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, Jh; Lopez Solino, S; Lovell, Gh; Lu, Y; Lucarelli, C; Lucchesi, D; Luchuk, S; Martinez, Ml; 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; Mohan, Lrm; Maev, O; Maevskiy, A; Maisuzenko, D; Majewski, Mw; Malczewski, Jj; Malde, S; Malecki, B; Malinin, A; Maltsev, T; Malygina, H; Manca, G; Mancinelli, G; Manuzzi, D; Marangotto, D; Maratas, J; Marchand, Jf; Marconi, U; Mariani, S; Benito, Cm; Marinangeli, M; Marks, J; Marshall, Am; Marshall, Pj; 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, Kr; Mauri, A; Maurice, E; Mauricio, J; Mazurek, M; Mccann, M; Mcconnell, L; Mcgrath, Th; Mchugh, Nt; Mcnab, A; Mcnulty, R; Mead, J; V,; Meadows, B; Meier, G; Meinert, N; Melnychuk, D; Meloni, S; Merk, M; Merli, A; Garcia, Lm; Mikhasenko, M; Milanes, Da; Millard, E; Milovanovic, M; Minard, M; Minotti, A; Minzoni, L; Mitchell, Se; Mitreska, B; Mitzel, Ds; Moedden, A; Mohammed, Ra; Moise, Rd; Mokhnenko, S; Mombacher, T; Monroy, Ia; Monteil, S; Morandin, M; Morello, G; Morello, Mj; Moron, J; Morris, Ab; Morris, Ag; Mountain, R; Mu, H; Muheim, F; Mulder, M; Mueller, D; Mueller, K; Murphy, Ch; 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, Em; Nieswand, S; Nikitin, N; Nolte, Ns; Normand, C; Nunez, C; Oblakowska-Mucha, A; Obraztsov, V; Oeser, T; O'Hanlon, Dp; Okamura, S; Oldeman, R; Oliva, F; Olivares, Me; Onderwater, Cjg; O'Neil, Rh; Goicochea, Jmo; Ovsiannikova, T; Owen, P; Oyanguren, A; Padeken, Ko; Pagare, B; Pais, Pr; Pajero, T; Palano, A; Palutan, M; Pan, Y; Panshin, G; Papanestis, A; Pappagallo, M; Pappalardo, Ll; Pappenheimer, C; Parker, W; Parkes, C; Passalacqua, B; Passaleva, G; Pastore, A; Patel, M; Patrignani, C; Pawley, Cj; Pearce, A; Pellegrino, A; Altarelli, Mp; Perazzini, S; Pereima, D; Pereiro Castro, A; Perret, P; Petric, M; Petridis, K; Petrolini, A; Petrov, A; Petrucci, S; Petruzzo, M; Pham, Tth; Philippov, A; Pica, L; Piccini, M; Pietrzyk, B; Pietrzyk, G; Pili, M; Pinci, D; Pisani, F; Pizzichemi, M; Resmi, Pk; Placinta, V; Plews, J; Plo Casasus, M; Polci, F; Lener, Mp; 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; V,; Trejo, Rir; Rachwal, B; Rademacker, Jh; Rama, M; Pernas, Mr; Rangel, Ms; 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, Ab; Rodrigues, E; Rodriguez Lopez, Ja; Rodriguez Rodriguez, Err; Rollings, A; Roloff, P; Romanovskiy, V; Romero Lamas, M; Romero Vidal, A; Roth, Jd; Rotondo, M; Rudolph, Ms; Ruf, T; Ruiz Fernandez, Ra; Ruiz Vidal, J; Ryzhikov, A; Ryzka, J; Saborido Silva, Jj; Sagidova, N; Sahoo, N; Saitta, B; Salomoni, M; Gras, Cs; 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; Smead, Lgs; 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, Mh; Schwemmer, R; Sciascia, B; Sellam, S; Semennikov, A; Soares, Ms; Sergi, A; Serra, N; Sestini, L; Seuthe, A; Shang, Y; Shangase, Dm; Shapkin, M; Shchemerov, I; Shchutska, L; Shears, T; Shekhtman, L; Shen, Z; Shevchenko, V; Shields, Eb; Shimizu, Y; Shmanin, E; Shupperd, Jd; Siddi, Bg; Coutinho, Rs; Simi, G; Simone, S; Skidmore, N; Skwarnicki, T; Slater, Mw; Slazyk, I; Smallwood, Jc; Smeaton, Jg; Smetkina, A; Smith, E; Smith, M; Snoch, A; Soares, M; Lavra, Ls; Sokoloff, Md; Soler, Fjp; Solovev, A; Solovyev, I; Souza De Almeida, Fl; De Paula, Bs; Spaan, B; Norella, Es; 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, Pn; Swientek, K; Szabelski, A; Szumlak, T; Szymanski, M; Taneja, S; Tanner, Ar; Tat, Md; Terentev, A; Teubert, F; Thomas, E; Thompson, Djd; Thomson, Ka; Tisserand, V; T'Jampens, S; Tobin, M; Tomassetti, L; Tong, X; Machado, Dt; Tou, Dy; Trifonova, E; Trippl, C; Tuci, G; Tully, A; Tuning, N; Ukleja, A; Unverzagt, Dj; Ursov, E; Usachov, A; Ustyuzhanin, A; Uwer, U; Vagner, A; Vagnoni, V; Valassi, A; Valenti, G; Canudas, Nv; van Beuzekom, M; Van Dijk, M; Van Hecke, H; van Herwijnen, E; Van Hulse, Cb; van Veghel, M; Vazquez Gomez, R; Vazquez Regueiro, P; Vazquez Sierra, C; Vecchi, S; Velthuis, Jj; Veltri, M; Venkateswaran, A; Veronesi, M; Vesterinen, M; Vieira, D; Diaz, Mv; Viemann, H; Vilasis-Cardona, X; Figueras, Ev; Villa, A; Vincent, P; Volle, Fc; 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, Ja; Watson, Nk; Weber, Sg; Websdale, D; Weisser, C; Westhenry, Bdc; White, Dj; Whitehead, M; Wiederhold, Ar; Wiedner, D; Wilkinson, G; Wilkinson, M; Williams, I; Williams, M; Williams, Mrj; Wilson, Ff; Wislicki, W; Witek, M; Witola, L; Wormser, G; Wotton, Sa; 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, Le; 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, Jb; Zou, Q; Zucchelli, S; Zuliani, D; Zunica, G

doi:10.1103/PhysRevD.105.L051104

The photon polarization in b -> s gamma transitions is measured for the first time in radiative b -baryon decays exploiting the unique spin structure of Lambda(0)(b)-> Lambda(gamma) 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 alpha(gamma) = 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., Beteta, C.a., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Measurement of the photon polarization in Lambda(0)(b) -> Lambda gamma decays. PHYSICAL REVIEW D, 105(5) [10.1103/PhysRevD.105.L051104].