Observation of $$ {\Lambda}_b^0 $$ → D+pπ−π− and $$ {\Lambda}_b^0 $$ → D*+pπ−π− decays
Authors
Aaij, R
Abdelmotteleb, ASW
Abellán Beteta, C
Abudinén, 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
Alvarez Cartelle, P
Amato, S
Amey, JL
Amhis, Y
An, L
Anderlini, L
Andersson, M
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
Baptista de Souza Leite, J
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
Bencivenni, G
Ben-Haim, E
Berezhnoy, A
Bernet, R
Berninghoff, D
Bernstein, HC
Bertella, C
Bertolin, A
Betancourt, C
Betti, F
Bezshyiko, Ia
Bhasin, S
Bhom, J
Bian, L
Bieker, MS
Biesuz, NV
Bifani, S
Billoir, P
Biolchini, A
Birch, M
Bishop, FCR
Bitadze, A
Bizzeti, A
Bjørn, 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, TJV
Boyer, A
Bozzi, C
Bradley, MJ
Braun, S
Brea Rodriguez, A
Brodzicka, J
Brossa Gonzalo, A
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
Cali, S
Calladine, R
Calvi, M
Calvo Gomez, M
Camargo Magalhaes, P
Campana, P
Campoverde Quezada, AF
Capelli, S
Capriotti, L
Carbone, A
Carboni, G
Cardinale, R
Cardini, A
Carli, I
Carniti, P
Carus, L
Carvalho Akiba, K
Casais Vidal, A
Caspary, R
Casse, G
Cattaneo, M
Cavallero, G
Celani, S
Cerasoli, J
Cervenkov, D
Chadwick, AJ
Chapman, MG
Charles, M
Charpentier, Ph
Chavez Barajas, CA
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, HV
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
Costa Sobral, CM
Couturier, B
Craik, DC
Crkovská, J
Cruz Torres, M
Currie, R
Da Silva, CL
Dadabaev, S
Dai, L
Dall’Occo, E
Dalseno, J
D’Ambrosio, C
Danilina, A
d’Argent, P
Dashkina, A
Davies, JE
Davis, A
De Aguiar Francisco, O
De Bruyn, K
De Capua, S
De Cian, M
De Lucia, E
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-P
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
Falcao, LN
Fan, Y
Fang, B
Farry, S
Fazzini, D
Féo, M
Fernandez Prieto, A
Fernez, AD
Ferrari, F
Ferreira Lopes, L
Ferreira Rodrigues, F
Ferreres Sole, S
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
Franco Lima, V
Franco Sevilla, M
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
Garcia Martin, LM
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García Pardiñas, J
Garcia Plana, B
Garcia Rosales, FA
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
Gioventù, A
Gironella Gironell, P
Giugliano, C
Gizdov, K
Gkougkousis, EL
Gligorov, VV
Göbel, C
Golobardes, E
Golubkov, D
Golutvin, A
Gomes, A
Gomez Fernandez, S
Goncalves Abrantes, F
Goncerz, M
Gong, G
Gorbounov, P
Gorelov, IV
Gotti, C
Grabowski, JP
Grammatico, T
Granado Cardoso, LA
Graugés, E
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Graziani, G
Grecu, A
Greeven, LM
Grieser, NA
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Gromov, S
Gruberg Cazon, BR
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Haefeli, G
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Publication Date
2022-03Journal Title
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Volume
2022
Issue
3
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Observation of $$ {\Lambda}_b^0 $$ → D+pπ−π− and $$ {\Lambda}_b^0 $$ → D*+pπ−π− decays. Journal of High Energy Physics, 2022 (3) https://doi.org/10.1007/jhep03(2022)153
Abstract
<jats:title>Abstract</jats:title><jats:p>The multihadron decays <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:italic>pπ−π−</jats:italic> and <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>pπ−π−</jats:italic> are observed in data corresponding to an integrated luminosity of 3 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>, collected in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV by the LHCb detector. Using the decay <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:inline-formula><jats:alternatives><jats:tex-math>$$ {\Lambda}_c^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>c</mml:mi>
<mml:mo>+</mml:mo>
</mml:msubsup>
</mml:math></jats:alternatives></jats:inline-formula><jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> as a normalisation channel, the ratio of branching fractions is measured to be<jats:disp-formula><jats:alternatives><jats:tex-math>$$ \frac{\mathcal{B}\left({\Lambda}_b^0\to {D}^{+}p{\pi}^{-}{\pi}^{-}\right)}{\mathcal{B}\left({\Lambda}_b^0\to {\Lambda}_c^0{\pi}^{+}{\pi}^{-}{\pi}^{-}\right)}\times \frac{\mathcal{B}\left({D}^{+}\to {K}^{-}{\pi}^{+}{\pi}^{+}\right)}{\mathcal{B}\left({\Lambda}_c^0\to {pK}^{-}{\pi}^{-}\right)}=\left(5.35\pm 0.21\pm 0.16\right)\%, $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<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:mi>p</mml:mi>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
<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:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>c</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
</mml:mfrac>
<mml:mo>×</mml:mo>
<mml:mfrac>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>K</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msubsup>
<mml:mi>Λ</mml:mi>
<mml:mi>c</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>pK</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
</mml:mfrac>
<mml:mo>=</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mn>5.35</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.21</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.16</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mo>%</mml:mo>
<mml:mo>,</mml:mo>
</mml:math></jats:alternatives></jats:disp-formula></jats:p><jats:p>where the first uncertainty is statistical and the second systematic. The ratio of branching fractions for 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>pπ</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> and <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>pπ</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> decays is found to be<jats:disp-formula><jats:alternatives><jats:tex-math>$$ \frac{\mathcal{B}\left({\Lambda}_b^0\to {D}^{\ast +}p{\pi}^{-}{\pi}^{-}\right)}{\mathcal{B}\left({\Lambda}_b^0\to {D}^{+}p{\pi}^{-}{\pi}^{-}\right)}\times \left(\mathcal{B}\left({D}^{\ast +}\to {D}^{+}{\pi}^0\right)+\mathcal{B}\left({D}^{\ast +}\to {D}^{+}\gamma \right)\right)=\left(61.3\pm 4.3\pm 4.0\right)\%. $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<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:mrow>
<mml:mo>∗</mml:mo>
<mml:mo>+</mml:mo>
</mml:mrow>
</mml:msup>
<mml:mi>p</mml:mi>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
<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:mi>p</mml:mi>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
</mml:mfrac>
<mml:mo>×</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mrow>
<mml:mo>∗</mml:mo>
<mml:mo>+</mml:mo>
</mml:mrow>
</mml:msup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mn>0</mml:mn>
</mml:msup>
</mml:mrow>
</mml:mfenced>
<mml:mo>+</mml:mo>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mrow>
<mml:mo>∗</mml:mo>
<mml:mo>+</mml:mo>
</mml:mrow>
</mml:msup>
<mml:mo>→</mml:mo>
<mml:msup>
<mml:mi>D</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:mi>γ</mml:mi>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
</mml:mfenced>
<mml:mo>=</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mn>61.3</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>4.3</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>4.0</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mo>%</mml:mo>
<mml:mo>.</mml:mo>
</mml:math></jats:alternatives></jats:disp-formula></jats:p>
Keywords
Regular Article - Experimental Physics, B Physics, Branching fraction, Flavour Physics, Hadron-Hadron Scattering
Identifiers
jhep03(2022)153, 18046
External DOI: https://doi.org/10.1007/jhep03(2022)153
This record's URL: https://www.repository.cam.ac.uk/handle/1810/335591
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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