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Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adams, JA, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P et al (show 1082 more authors) , Agapopoulou, C, Aidala, CA, Ajaltouni, Z, Akar, S, Akiba, K, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Aliouche, Z, Alvarez Cartelle, P, Amalric, R, Amato, S, Amey, JL, Amhis, Y, An, L, Anderlini, L, Andersson, M, Andreianov, A, Andreola, P, Andreotti, M, Andreou, D, Anelli, A, Ao, D, Archilli, F, Argenton, M, Arguedas Cuendis, S, Artamonov, A, Artuso, M, Aslanides, E, Atzeni, M, Audurier, B, Bacher, D, Bachiller Perea, I, Bachmann, S, Bachmayer, M, Back, JJ, Baladron Rodriguez, P, Balagura, V, Baldini, W, Baptista de Souza Leite, J, Barbetti, M, Barbosa, IR, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Bartz, J, Baryshnikov, F, Basels, JM, Bassi, G, Batsukh, B, Battig, A, Bay, A, Beck, A, Becker, M, Bedeschi, F, Bediaga, IB, Beiter, A, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Benane, G, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Bernet Andres, S, Bertella, C, Bertolin, A, Betancourt, C, Betti, F, Bex, J, Bezshyiko, Ia, Bhom, J, Bieker, MS, Biesuz, NV, Billoir, P, Biolchini, A, Birch, M, Bishop, FCR, Bitadze, A, Bizzeti, A, Blake, T, Blanc, F, Blank, JE, Blusk, S, Bocharnikov, V, Boelhauve, JA, Boente Garcia, O, Boettcher, T, Bohare, A, Boldyrev, A, Bolognani, CS, Bolzonella, R, Bondar, N, Borgato, F, Borghi, S, Borsato, M, Borsuk, JT, Bouchiba, SA, Bowcock, TJV, Boyer, A, Bozzi, C, Bradley, MJ, Brea Rodriguez, A, Breer, N, Brodzicka, J, Brossa Gonzalo, A, Brown, J, Brundu, D, Buchanan, E, Buonaura, A, Buonincontri, L, Burke, AT 
ORCID: 0000-0003-0243-0517, Burr, C, Bursche, A, Butkevich, A, Butter, JS, Buytaert, J, Byczynski, W, Cadeddu, S, Cai, H, Calabrese, R, Calefice, L, Cali, S, Calvi, M, Calvo Gomez, M, Cambon Bouzas, JI, Campana, P, Campora Perez, DH, Campoverde Quezada, AF, Capelli, S, Capriotti, L, Caravaca-Mora, R, Carbone, A, Carcedo Salgado, L, Cardinale, R, Cardini, A, Carniti, P, Carus, L, Casais Vidal, A, Caspary, R, Casse, G ORCID: 0000-0002-8516-237X, Castro Godinez, J, Cattaneo, M, Cavallero, G, Cavallini, V, Celani, S, Cerasoli, J, Cervenkov, D, Cesare, S, Chadwick, AJ, Chahrour, I, Charles, M, Charpentier, Ph, Chavez Barajas, CA, Chefdeville, M, Chen, C, Chen, S, Chen, Z, Chernov, A, Chernyshenko, S, Chobanova, V, Cholak, S, Chrzaszcz, M, Chubykin, A, Chulikov, V, Ciambrone, P, Cid Vidal, X, Ciezarek, G, Cifra, P, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Cocha Toapaxi, C, Coco, V, Cogan, J, Cogneras, E, Cojocariu, L, Collins, P, Colombo, T, Comerma-Montells, A, Congedo, L, Contu, A, Cooke, N, Corredoira, I, Correia, A, Corti, G, Cottee Meldrum, JJ, Couturier, B, Craik, DC, Cruz Torres, M, Curras Rivera, E, Currie, R, Da Silva, CL, Dadabaev, S, Dai, L, Dai, X, Dall’Occo, E, Dalseno, J, D’Ambrosio, C, Daniel, J, Danilina, A, d’Argent, P, Davidson, A, Davies, JE, Davis, A, De Aguiar Francisco, O, De Angelis, C, De Benedetti, F, de Boer, J, De Bruyn, K, De Capua, S, De Cian, M, De Freitas Carneiro Da Graca, U, De Lucia, E, De Miranda, JM, De Paula, L, De Serio, M, De Simone, D, De Simone, P, De Vellis, F, de Vries, JA, Debernardis, F, Decamp, D, Dedu, V, Del Buono, L, Delaney, B, Dembinski, H-P, Deng, J, Denysenko, V, Deschamps, O, Dettori, F, Dey, B, Di Nezza, P, Diachkov, I, Didenko, S, Ding, S, Dittmann, L, Dobishuk, V, Docheva, AD, Dolmatov, A, Dong, C, Donohoe, AM, Dordei, F, dos Reis, AC, Dowling, AD, Downes, AG, Duan, W, Duda, P, Dudek, MW, Dufour, L, Duk, V, Durante, P, Duras, MM, Durham, JM, Durmus, OD, Dziurda, A, Dzyuba, A, Easo, S, Eckstein, E, Egede, U, Egorychev, A, Egorychev, V, Eisenhardt, S, Ejopu, E, Ek-In, S, Eklund, L, Elashri, M, Ellbracht, J, Ely, S, Ene, A, Epple, E, Escher, S, Eschle, J, Esen, S, Evans, T, Fabiano, F, Falcao, LN, Fan, Y, Fang, B, Fantini, L, Faria, M, Farmer, K, Fazzini, D, Felkowski, L, Feng, M, Feo, M, Fernandez Gomez, M, Fernez, AD, Ferrari, F, Ferreira Rodrigues, F, Ferreres Sole, S, Ferrillo, M, Ferro-Luzzi, M, Filippov, S, Fini, RA, Fiorini, M, Fischer, KM, Fitzgerald, DS, Fitzpatrick, C, Fleuret, F, Fontana, M, Foreman, LF, Forty, R, Foulds-Holt, D, Franco Sevilla, M, Frank, M, Franzoso, E, Frau, G, Frei, C, Friday, DA, Fu, J, Fuehring, Q, Fujii, Y, Fulghesu, T, Gabriel, E, Galati, G, Galati, MD, Gallas Torreira, A, Galli, D, Gambetta, S, Gandelman, M, Gandini, P, Gao, H, Gao, R, Gao, Y, Gao, Y, Gao, Y, Garau, M, Garcia Martin, LM, Garcia Moreno, P, García Pardiñas, J, Garg, KG, Garrido, L, Gaspar, C, Geertsema, RE, Gerken, LL, Gersabeck, E, Gersabeck, M, Gershon, T, Ghorbanimoghaddam, Z, Giambastiani, L, Giasemis, FI, Gibson, V, Giemza, HK, Gilman, AL, Giovannetti, M, Gioventù, A, Gironella Gironell, P, Giugliano, C, Giza, MA, Gkougkousis, EL, Glaser, FC, Gligorov, VV, Göbel, C, Golobardes, E, Golubkov, D, Golutvin, A, Gomes, A, Gomez Fernandez, S, Goncalves Abrantes, F, Goncerz, M, Gong, G, Gooding, JA, Gorelov, IV, Gotti, C, Grabowski, JP, Granado Cardoso, LA, Graugés, E, Graverini, E, Grazette, L, Graziani, G, Grecu, AT, Greeven, LM, Grieser, NA, Grillo, L, Gromov, S, Gu, C, Guarise, M, Guittiere, M, Guliaeva, V, Günther, PA, Guseinov, A-K, Gushchin, E, Guz, Y, Gys, T, Habermann, K, Hadavizadeh, T, Hadjivasiliou, C, Haefeli, G, Haen, C, Haimberger, J, Hajheidari, M, Halvorsen, MM, Hamilton, PM, Hammerich, J ORCID: 0000-0002-5556-1775, Han, Q, Han, X, Hansmann-Menzemer, S, Hao, L, Harnew, N, Harrison, T, Hartmann, M, He, J, Heijhoff, K, Hemmer, F, Henderson, C, Henderson, RDL, Hennequin, AM, Hennessy, K, Henry, L, Herd, J, Herrero Gascon, P, Heuel, J, Hicheur, A, Hijano Mendizabal, G, Hill, D, Hollitt, SE, Horswill, J, Hou, R, Hou, Y, Howarth, N, Hu, J, Hu, J, Hu, W, Hu, X, Huang, W, Hulsbergen, W, Hunter, RJ, Hushchyn, M, Hutchcroft, D ORCID: 0000-0002-4174-6509, Ilin, D, Ilten, P, Inglessi, A, Iniukhin, A, Ishteev, A, Ivshin, K, Jacobsson, R, Jage, H, Jaimes Elles, SJ, Jakobsen, S, Jans, E, Jashal, BK, Jawahery, A, Jevtic, V, Jiang, E, Jiang, X, Jiang, Y, Jiang, YJ, John, M, Johnson, D, Jones, CR, Jones, TP, Joshi, S, Jost, B, Jurik, N, Juszczak, I, Kaminaris, D, Kandybei, S, Kang, Y, Karacson, M, Karpenkov, D, Kauniskangas, A, Kautz, JW, Keizer, F, Kenzie, M, Ketel, T, Khanji, B, Kharisova, A, Kholodenko, S, Khreich, G, Kirn, T, Kirsebom, VS, Kitouni, O, Klaver, S, Kleijne, N, Klimaszewski, K, Kmiec, MR, Koliiev, S, Kolk, L, Konoplyannikov, A, Kopciewicz, P, Koppenburg, P, Korolev, M, Kostiuk, I, Kot, O, Kotriakhova, S, Kozachuk, A, Kravchenko, P, Kravchuk, L, Kreps, M, Kretzschmar, S, Krokovny, P, Krupa, W, Krzemien, W, Kubat, J, Kubis, S, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kulikova, E, Kupsc, A, Kutsenko, BK, Lacarrere, D, Lai, A, Lampis, A, Lancierini, D, Landesa Gomez, C, Lane, JJ, Lane, R, Langenbruch, C, Langer, J, Lantwin, O, Latham, T, Lazzari, F, Lazzeroni, C, Le Gac, R, Lefèvre, R, Leflat, A, Legotin, S, Lehuraux, M, Lemos Cid, E, Leroy, O, Lesiak, T, Leverington, B, Li, A, Li, H, Li, K, Li, L, Li, P, Li, P-R, Li, S, Li, T, Li, T, Li, Y, Li, Y, Li, Z, Lian, Z, Liang, X, Libralon, S, Lin, C, Lin, T, Lindner, R, Lisovskyi, V, Litvinov, R, Liu, FL, Liu, G, Liu, K, Liu, Q, Liu, S, Liu, Y, Liu, Y, Liu, YL, Lobo Salvia, A, Loi, A, Lomba Castro, J, Long, T, Lopes, JH, Lopez Huertas, A, López Soliño, S, Lovell, GH, Lucarelli, C, Lucchesi, D, Luchuk, S, Lucio Martinez, M, Lukashenko, V, Luo, Y, Lupato, A, Luppi, E, Lynch, K, Lyu, X-R, Ma, GM, Ma, R, Maccolini, S, Machefert, F, Maciuc, F, Mack, BM, Mackay, I, Mackey, LM, Madhan Mohan, LR, Madurai, MM, Maevskiy, A, Magdalinski, D, Maisuzenko, D, Majewski, MW, Malczewski, JJ, Malde, S, Malecki, B, Malentacca, L, Malinin, A, Maltsev, T, Manca, G, Mancinelli, G, Mancuso, C, Manera Escalero, R, Manuzzi, D, Marangotto, D, Marchand, JF, Marchevski, R, Marconi, U, Mariani, S, Marin Benito, C, 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, Mayencourt, P, Mazurek, M, McCann, M, Mcconnell, L, McGrath, TH, McHugh, NT, McNab, A, McNulty, R, Meadows, B, Meier, G, Melnychuk, D, Merk, M, Merli, A, Meyer Garcia, L, Miao, D, Miao, H, Mikhasenko, M, Milanes, DA, Minotti, A, Minucci, E, Miralles, T, Mitreska, B, Mitzel, DS, Modak, A, Mödden, A, Mohammed, RA, Moise, RD, Mokhnenko, S, Mombächer, T, Monk, M, Monteil, S, Morcillo Gomez, A, Morello, G, Morello, MJ, Morgenthaler, MP, Morris, AB, Morris, AG, Mountain, R, Mu, H, Mu, ZM, Muhammad, E, Muheim, F, Mulder, M, Müller, K, Muñoz-Rojas, F, Murta, R, Naik, P, Nakada, T, Nandakumar, R, Nanut, T, Nasteva, I, Needham, M, Neri, N, Neubert, S, Neufeld, N, Neustroev, P, Nicolini, J, Nicotra, D, Niel, EM, Nikitin, N, Nogga, P, Nolte, NS, Normand, C, Novoa Fernandez, J, Nowak, G, Nunez, C, Nur, HN, Oblakowska-Mucha, A, Obraztsov, V, Oeser, T, Okamura, S, Okhotnikov, A, Oldeman, R, Oliva, F, Olocco, M, Onderwater, CJG, O’Neil, RH, Otalora Goicochea, JM, Owen, P, Oyanguren, A, Ozcelik, O, Padeken, KO, Pagare, B, Pais, PR, Pajero, T, Palano, A, Palutan, M, Panshin, G, Paolucci, L, Papanestis, A, Pappagallo, M, Pappalardo, LL, Pappenheimer, C, Parkes, C, Passalacqua, B, Passaleva, G, Passaro, D, Pastore, A, Patel, M, Patoc, J, Patrignani, C, Pawley, CJ, Pellegrino, A, Pepe Altarelli, M, Perazzini, S, Pereima, D, Pereiro Castro, A, Perret, P, Perro, A, Petridis, K, Petrolini, A, Petrucci, S, Pfaller, JP, Pham, H, Pica, L, Piccini, M, Pietrzyk, B, Pietrzyk, G, Pinci, D, Pisani, F, Pizzichemi, M, Placinta, V, Plo Casasus, M, Polci, F, Poli Lener, M, Poluektov, A, Polukhina, N, Polyakov, I, Polycarpo, E, Ponce, S, Popov, D, Poslavskii, S, Prasanth, K, Prouve, C, Pugatch, V, Punzi, G, Qian, W, Qin, N, Qu, S, Quagliani, R, Rabadan Trejo, RI, Rademacker, JH, Rama, M, Ramírez García, M, Ramos Pernas, M, Rangel, MS, Ratnikov, F, Raven, G, Rebollo De Miguel, M, Redi, F, Reich, J, Reiss, F, Ren, Z, Resmi, PK, Ribatti, R, Ricart, GR, Riccardi, D, Ricciardi, S, Richardson, K, Richardson-Slipper, M, Rinnert, K, Robbe, P, Robertson, G, Rodrigues, E, Rodriguez Fernandez, E, Rodriguez Lopez, JA, Rodriguez Rodriguez, E, Rogovskiy, A, Rolf, DL, Roloff, P, Romanovskiy, V, Romero Lamas, M, Romero Vidal, A, Romolini, G, Ronchetti, F, Rotondo, M, Roy, SR, Rudolph, MS, Ruf, T, Ruiz Diaz, M, Ruiz Fernandez, RA, Ruiz Vidal, J, Ryzhikov, A, Ryzka, J, Saavedra-Arias, JJ, Saborido Silva, JJ, Sadek, R, Sagidova, N, Sahoo, D, Sahoo, N, Saitta, B, Salomoni, M, Sanchez Gras, C, Sanderswood, I, Santacesaria, R, Santamarina Rios, C, Santimaria, M, Santoro, L, Santovetti, E, Saputi, A, Saranin, D, Sarpis, G, Sarpis, M, Sarti, A, Satriano, C, Satta, A, Saur, M, Savrina, D, Sazak, H, Scantlebury Smead, LG, Scarabotto, A, Schael, S, Scherl, S ORCID: 0000-0003-0528-2724, Schertz, AM, Schiller, M, Schindler, H, Schmelling, M, Schmidt, B, Schmitt, S, Schmitz, H, Schneider, O, Schopper, A, Schulte, N, Schulte, S, Schune, MH, Schwemmer, R, Schwering, G, Sciascia, B, Sciuccati, A, Sellam, S, Semennikov, A, Senger, T, Senghi Soares, M, Sergi, A, Serra, N, Sestini, L, Seuthe, A, Shang, Y, Shangase, DM, Shapkin, M, Sharma, RS, Shchemerov, I, Shchutska, L, Shears, T ORCID: 0000-0002-2653-1366, Shekhtman, L, Shen, Z, Sheng, S, Shevchenko, V, Shi, B, Shields, EB, Shimizu, Y, Shmanin, E, Shorkin, R, Shupperd, JD, Silva Coutinho, R, Simi, G, Simone, S, Skidmore, N, Skwarnicki, T, Slater, MW, Smallwood, JC, Smith, E, Smith, K, Smith, M, Snoch, A, Soares Lavra, L, Sokoloff, MD, Soler, FJP, Solomin, A, Solovev, A, Solovyev, I, Song, R, Song, Y, Song, Y, Song, YS, Souza De Almeida, FL, Souza De Paula, B, Spadaro Norella, E, Spedicato, E, Speer, JG, Spiridenkov, E, Spradlin, P, Sriskaran, V, Stagni, F, Stahl, M, Stahl, S, Stanislaus, S, Stein, EN, Steinkamp, O, Stenyakin, O, Stevens, H, Strekalina, D, Su, Y, Suljik, F, Sun, J, Sun, L, Sun, Y, Sutcliffe, W, Swallow, PN, Swystun, F, Szabelski, A, Szumlak, T, Tan, Y, Taneja, S, Tat, MD, Terentev, A, Terzuoli, F, Teubert, F, Thomas, E, Thompson, DJD, Tilquin, H, Tisserand, V, T’Jampens, S, Tobin, M, Tomassetti, L, Tonani, G, Tong, X, Torres Machado, D, Toscano, L, Tou, DY, Trippl, C, Tuci, G, Tuning, N, Uecker, LH, Ukleja, A, Unverzagt, DJ, Ursov, E, Usachov, A, Ustyuzhanin, A, Uwer, U, Vagnoni, V, Valassi, A, Valenti, G, Valls Canudas, N, Van Hecke, H, van Herwijnen, E, Van Hulse, CB, Van Laak, R, van Veghel, M, Vazquez Gomez, R, Vazquez Regueiro, P, Vázquez Sierra, C, Vecchi, S, Velthuis, JJ, Veltri, M, Venkateswaran, A, 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Zharkova, A, Zhelezov, A, Zheng, XZ, Zheng, Y, Zhou, T, Zhou, X, Zhou, Y, Zhovkovska, V, Zhu, LZ, Zhu, X, Zhu, X, Zhukov, V, Zhuo, J, Zou, Q, Zuliani, D and Zunica, G
(2024)
First observation of the $$ {\Lambda}_b^0 $$ → D+D−Λ decay.
Journal of High Energy Physics, 2024 (7).
140-.
ISSN 1126-6708, 1029-8479
Access the full-text of this item by clicking on the
Open Access link.
Abstract
<jats:title>A<jats:sc>bstract</jats:sc>
</jats:title>
<jats:p>The <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ {\Lambda}_b^0 $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math>
</jats:alternatives>
</jats:inline-formula> → <jats:italic>D</jats:italic>
<jats:sup>+</jats:sup>
<jats:italic>D</jats:italic>
<jats:sup>
<jats:italic>−</jats:italic>
</jats:sup>Λ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5<jats:italic>.</jats:italic>3 fb<jats:sup>
<jats:italic>−</jats:italic>1</jats:sup>. Using the <jats:italic>B</jats:italic>
<jats:sup>0</jats:sup> → <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ {D}^{+}{D}^{-}{K}_S^0 $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msubsup>
<mml:mi>K</mml:mi>
<mml:mi>S</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math>
</jats:alternatives>
</jats:inline-formula> decay as a reference channel, the product of the relative production cross-section and decay branching fractions is measured to be<jats:disp-formula>
<jats:alternatives>
<jats:tex-math>$$ \mathcal{R}=\frac{\sigma_{\Lambda_b^0}}{\sigma_{B^0}}=\frac{\mathcal{B}\left({\Lambda}_b^0\to {D}^{+}{D}^{-}\Lambda \right)}{\mathcal{B}\left({B}^0\to {D}^{+}{D}^{-}{K}_{\textrm{S}}^0\right)}=0.179\pm 0.022\pm 0.014, $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>R</mml:mi>
<mml:mo>=</mml:mo>
<mml:mfrac>
<mml:msub>
<mml:mi>σ</mml:mi>
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:msub>
<mml:msub>
<mml:mi>σ</mml:mi>
<mml:msup>
<mml:mi>B</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
</mml:msub>
</mml:mfrac>
<mml:mo>=</mml:mo>
<mml:mfrac>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:mi>Λ</mml:mi>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msup>
<mml:mi>B</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msubsup>
<mml:mi>K</mml:mi>
<mml:mi>S</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
</mml:mfrac>
<mml:mo>=</mml:mo>
<mml:mn>0.179</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.022</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.014</mml:mn>
<mml:mo>,</mml:mo>
</mml:math>
</jats:alternatives>
</jats:disp-formula>
</jats:p>
<jats:p>where the first uncertainty is statistical and the second is systematic. The known branching fraction of the reference channel, <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ \mathcal{B}\left({B}^0\to {D}^{+}{D}^{-}{K}_{\textrm{S}}^0\right) $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msup>
<mml:mi>B</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msubsup>
<mml:mi>K</mml:mi>
<mml:mi>S</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:mrow>
</mml:mfenced>
</mml:math>
</jats:alternatives>
</jats:inline-formula>, and the cross-section ratio, <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ {\sigma}_{\Lambda_b^0}/{\sigma}_{B^0} $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msub>
<mml:mi>σ</mml:mi>
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:msub>
<mml:mo>/</mml:mo>
<mml:msub>
<mml:mi>σ</mml:mi>
<mml:msup>
<mml:mi>B</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
</mml:msub>
</mml:math>
</jats:alternatives>
</jats:inline-formula>, previously measured by LHCb are used to derive the branching fraction of the <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ {\Lambda}_b^0 $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math>
</jats:alternatives>
</jats:inline-formula>
<jats:italic>→ D</jats:italic>
<jats:sup>+</jats:sup>
<jats:italic>D</jats:italic>
<jats:sup>
<jats:italic>−</jats:italic>
</jats:sup>Λ decay<jats:disp-formula>
<jats:alternatives>
<jats:tex-math>$$ \mathcal{B}\left({\Lambda}_b^0\to {D}^{+}{D}^{-}\Lambda \right)=\left(1.24\pm 0.15\pm 0.10\pm 0.28\pm 0.11\right)\times {10}^{-4}, $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:mi>Λ</mml:mi>
</mml:mrow>
</mml:mfenced>
<mml:mo>=</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mn>1.24</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.15</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.10</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.28</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.11</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mo>×</mml:mo>
<mml:msup>
<mml:mn>10</mml:mn>
<mml:mrow>
<mml:mo>−</mml:mo>
<mml:mn>4</mml:mn>
</mml:mrow>
</mml:msup>
<mml:mo>,</mml:mo>
</mml:math>
</jats:alternatives>
</jats:disp-formula>
</jats:p>
<jats:p>where the third and fourth contributions are due to uncertainties of <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ \mathcal{B}\left({B}^0\to {D}^{+}{D}^{-}{K}_{\textrm{S}}^0\right) $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msup>
<mml:mi>B</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msubsup>
<mml:mi>K</mml:mi>
<mml:mi>S</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:mrow>
</mml:mfenced>
</mml:math>
</jats:alternatives>
</jats:inline-formula> and <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ {\sigma}_{\Lambda_b^0}/{\sigma}_{B^0} $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msub>
<mml:mi>σ</mml:mi>
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:msub>
<mml:mo>/</mml:mo>
<mml:msub>
<mml:mi>σ</mml:mi>
<mml:msup>
<mml:mi>B</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
</mml:msub>
</mml:math>
</jats:alternatives>
</jats:inline-formula>, respectively. Inspection of the <jats:italic>D</jats:italic>
<jats:sup>+</jats:sup>Λ and <jats:italic>D</jats:italic>
<jats:sup>+</jats:sup>
<jats:italic>D</jats:italic>
<jats:sup>
<jats:italic>−</jats:italic>
</jats:sup> invariant-mass distributions suggests a rich presence of intermediate resonances in the decay. The <jats:inline-formula>
<jats:alternatives>
<jats:tex-math>$$ {\Lambda}_b^0 $$</jats:tex-math>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>b</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math>
</jats:alternatives>
</jats:inline-formula> → <jats:italic>D</jats:italic>
<jats:sup>*+</jats:sup>
<jats:italic>D</jats:italic>
<jats:sup>
<jats:italic>−</jats:italic>
</jats:sup>Λ decay is also observed for the first time as a partially reconstructed component in the <jats:italic>D</jats:italic>
<jats:sup>+</jats:sup>
<jats:italic>D</jats:italic>
<jats:sup>
<jats:italic>−</jats:italic>
</jats:sup>Λ invariant mass spectrum.</jats:p>
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