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3,055 results on '"Rogozhnikov, A"'

1. Interventional Causal Discovery in a Mixture of DAGs

Author

Varıcı, Burak, Katz-Rogozhnikov, Dmitriy, Wei, Dennis, Sattigeri, Prasanna, and Tajer, Ali

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence, Statistics - Methodology, Statistics - Machine Learning
Abstract

Causal interactions among a group of variables are often modeled by a single causal graph. In some domains, however, these interactions are best described by multiple co-existing causal graphs, e.g., in dynamical systems or genomics. This paper addresses the hitherto unknown role of interventions in learning causal interactions among variables governed by a mixture of causal systems, each modeled by one directed acyclic graph (DAG). Causal discovery from mixtures is fundamentally more challenging than single-DAG causal discovery. Two major difficulties stem from (i)~an inherent uncertainty about the skeletons of the component DAGs that constitute the mixture and (ii)~possibly cyclic relationships across these component DAGs. This paper addresses these challenges and aims to identify edges that exist in at least one component DAG of the mixture, referred to as the true edges. First, it establishes matching necessary and sufficient conditions on the size of interventions required to identify the true edges. Next, guided by the necessity results, an adaptive algorithm is designed that learns all true edges using $O(n^2)$ interventions, where $n$ is the number of nodes. Remarkably, the size of the interventions is optimal if the underlying mixture model does not contain cycles across its components. More generally, the gap between the intervention size used by the algorithm and the optimal size is quantified. It is shown to be bounded by the cyclic complexity number of the mixture model, defined as the size of the minimal intervention that can break the cycles in the mixture, which is upper bounded by the number of cycles among the ancestors of a node., Comment: NeurIPS 2024 camera-ready version

Published
2024

2. Causal Bandits with General Causal Models and Interventions

Author

Yan, Zirui, Wei, Dennis, Katz-Rogozhnikov, Dmitriy, Sattigeri, Prasanna, and Tajer, Ali

Subjects
Statistics - Machine Learning, Computer Science - Machine Learning
Abstract

This paper considers causal bandits (CBs) for the sequential design of interventions in a causal system. The objective is to optimize a reward function via minimizing a measure of cumulative regret with respect to the best sequence of interventions in hindsight. The paper advances the results on CBs in three directions. First, the structural causal models (SCMs) are assumed to be unknown and drawn arbitrarily from a general class $\mathcal{F}$ of Lipschitz-continuous functions. Existing results are often focused on (generalized) linear SCMs. Second, the interventions are assumed to be generalized soft with any desired level of granularity, resulting in an infinite number of possible interventions. The existing literature, in contrast, generally adopts atomic and hard interventions. Third, we provide general upper and lower bounds on regret. The upper bounds subsume (and improve) known bounds for special cases. The lower bounds are generally hitherto unknown. These bounds are characterized as functions of the (i) graph parameters, (ii) eluder dimension of the space of SCMs, denoted by $\operatorname{dim}(\mathcal{F})$, and (iii) the covering number of the function space, denoted by ${\rm cn}(\mathcal{F})$. Specifically, the cumulative achievable regret over horizon $T$ is $\mathcal{O}(K d^{L-1}\sqrt{T\operatorname{dim}(\mathcal{F}) \log({\rm cn}(\mathcal{F}))})$, where $K$ is related to the Lipschitz constants, $d$ is the graph's maximum in-degree, and $L$ is the length of the longest causal path. The upper bound is further refined for special classes of SCMs (neural network, polynomial, and linear), and their corresponding lower bounds are provided., Comment: 37 pages, 13 figures, conference

Published
2024

4. Industrial Cyber-Physical Systems: Control Problems and Solutions. A Bibliometric Analysis Approach

Author

Kravets, Alla G., Borzin, Roman Yu., Rogozhnikov, Evgeny D., Kacprzyk, Janusz, Series Editor, Novikov, Dmitry A., Editorial Board Member, Shi, Peng, Editorial Board Member, Cao, Jinde, Editorial Board Member, Polycarpou, Marios, Editorial Board Member, Pedrycz, Witold, Editorial Board Member, Kravets, Alla G., and Bolshakov, Alexander A., editor

Published
2024
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7. Efficacy of comprehensive dental treatment for lichenoid reactions of the mucoparodontal complex: A single-center pilot cohort study

Author

O. S. Gileva, T. V. Libik, G. I. Rogozhnikov, N. V. Gibadullina, A. G. Rogozhnikov, and M. S. Gavrilenko

Subjects
lichenoid reactions, potentially malignant lesions of the oral mucosa, highly potent topical steroids, calcineurin inhibitors, low level laser therapy, Medicine
Abstract

Background. Lichenoid reactions of the oral mucosa are currently recognized as a serious issue for dentists of various specialties, since their knowledge and competence in the diagnosis and pathogenetic treatment of lichenoid lesions of the oral cavity are yet to be improved. Following the data on high oncogenic potential in some forms of lichenoid reactions of oral cavity mucous membranes, the issue should be given serious considerations, and dentists should keep oncology-related suspicion when receiving these patients.Objective. To evaluate the efficacy of comprehensive dental treatment for lichenoid reactions of the mucoparodontal complex.Methods. A single-center pilot cohort study was conducted to evaluate the efficacy of the comprehensive treatment (combination of pharmacotherapy and physiotherapy) of patients with lichenoid reactions of the oral mucosa. The observation group consisted of 49 patients (15 males, 34 females) aged 58.92 ± 0.82 years with verified diagnoses of oral mucosa lichenoid reactions. The suggested treatment included pharmacotherapy (highly-potent topical steroids, calcineurin inhibitors) and physiotherapy in the form of low level laser therapy (635 nm, 10 W) provided via Matrix laser (Matrix, Russia). Treatment efficacy was assessed by the total scale of treatment efficacy, registering indicators of the area of focal lesions and the severity of pain syndrome, as well as by changes in dental quality of life indicators according to OHIP-49-RU (Oral Health Impact Profile) in the Russian version. Statistical processing of the data involved Student’s t-test and Wilcoxon t-test. Differences were considered significant at p ≤ 0.05. Data statistical analysis was performed using SPSS 13.0 (SPSS Inc., USA).Results. During the follow-up period, the indicators of the total scale of treatment efficacy decreased significantly (p < 0.001) in 100% of patients and amounted (as medians and quartiles): 6.0 (4.0–7.0) points before treatment and 1.0 (1.0–2.0) points after treatment to be objectified by a significant reduction in the area of focal lesions (by 63.2%, p < 0.001) and in pain syndrome (spontaneous pain from 2.0 (1.5–3.0) points before treatment to 0.0 (0.0–1.0) points after treatment; induced pain from 3.0 (2.0–3.0) points to 1.0 (0.0–1.0) points). Along with the clinical improvement, the scores in dental quality of life improved from 83.11 ± 2.58 to 39.94 ± 0.86 points, according to OHIP-49 RU (Oral Health Impact Profile).Conclusion. Early detection and differentiation of lichenoid reactions in oral mucous membranes ensure timely treatment using the developed protocol of comprehensive treatment (combination of pharmacotherapy and physiotherapy). The efficacy of the protocol was confirmed clinically and justified in relation to quality of life.

Published
2023
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12. Reducing Successive Interference Cancellation Iterations in Hybrid Beamforming Multiuser Massive Multiple Input Multiple Output Systems Through Grouping Users with Symmetry Channels

Author

Hashem Khaled Rehab, Eugeniy Rogozhnikov, Kirill Savenko, Semen Mukhamadiev, Yakov Kryukov, and Dmitriy Pokamestov

Subjects
hybrid beamforming, SIC, MIMO, mm-Wave, spectral efficiency, Mathematics, QA1-939
Abstract

This paper presents a comprehensive exploration of advanced beamforming techniques tailored for millimeter-wave (mm-Wave) communication systems. In response to the burgeoning demand for higher data rates, coupled with the constraints of power consumption and hardware complexity, this study focuses on developing a hybrid beamforming framework optimized for downlink scenarios, specifically targeting groups of users based on the approximate symmetry of their channels. The primary innovation of this research lies in leveraging the symmetry of channels among near users to develop a group-based successive interference cancellation (SIC) algorithm. Unlike traditional approaches that address interference on a per-user basis, this algorithm utilizes channel symmetry within clusters of users to reduce computational complexity and improve the efficiency of SIC. By grouping users with symmetrical channel characteristics, the algorithm simplifies the interference management process while maintaining system performance. The proposed system demonstrates notable advantages over existing non-linear algorithms through extensive simulations and performance evaluations, particularly in terms of spectral efficiency and computational complexity. In this study, we further emphasize the importance of balancing spectral efficiency improvements with reduced computational demands, offering a nuanced trade-off that accommodates various operational requirements. The flexible optimization framework provided showcases the system’s adaptability to diverse deployment scenarios and network configurations.

Published
2024
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17. CAPE: Encoding Relative Positions with Continuous Augmented Positional Embeddings

Author

Likhomanenko, Tatiana, Xu, Qiantong, Synnaeve, Gabriel, Collobert, Ronan, and Rogozhnikov, Alex

Subjects
Computer Science - Machine Learning, Computer Science - Computation and Language, Computer Science - Computer Vision and Pattern Recognition
Abstract

Without positional information, attention-based Transformer neural networks are permutation-invariant. Absolute or relative positional embeddings are the most popular ways to feed Transformer models with positional information. Absolute positional embeddings are simple to implement, but suffer from generalization issues when evaluating on sequences longer than seen at training time. Relative positions are more robust to input length change, but are more complex to implement and yield inferior model throughput due to extra computational and memory costs. In this paper, we propose an augmentation-based approach (CAPE) for absolute positional embeddings, which keeps the advantages of both absolute (simplicity and speed) and relative positional embeddings (better generalization). In addition, our empirical evaluation on state-of-the-art models in machine translation, image and speech recognition demonstrates that CAPE leads to better generalization performance as well as increased stability with respect to training hyper-parameters.

Published
2021

18. Automated Meta-Analysis: A Causal Learning Perspective

Author

Cheng, Lu, Katz-Rogozhnikov, Dmitriy A., Varshney, Kush R., and Baldini, Ioana

Subjects
Computer Science - Computers and Society
Abstract

Meta-analysis is a systematic approach for understanding a phenomenon by analyzing the results of many previously published experimental studies. It is central to deriving conclusions about the summary effect of treatments and interventions in medicine, poverty alleviation, and other applications with social impact. Unfortunately, meta-analysis involves great human effort, rendering a process that is extremely inefficient and vulnerable to human bias. To overcome these issues, we work toward automating meta-analysis with a focus on controlling for risks of bias. In particular, we first extract information from scientific publications written in natural language. From a novel causal learning perspective, we then propose to frame automated meta-analysis -- based on the input of the first step -- as a multiple-causal-inference problem where the summary effect is obtained through intervention. Built upon existing efforts for automating the initial steps of meta-analysis, the proposed approach achieves the goal of automated meta-analysis and largely reduces the human effort involved. Evaluations on synthetic and semi-synthetic datasets show that this approach can yield promising results., Comment: 11 pages, 6 figures

Published
2021

22. High-Dimensional Feature Selection for Sample Efficient Treatment Effect Estimation

Author

Greenewald, Kristjan, Katz-Rogozhnikov, Dmitriy, and Shanmugam, Karthik

Subjects
Statistics - Machine Learning, Computer Science - Machine Learning, Statistics - Methodology
Abstract

The estimation of causal treatment effects from observational data is a fundamental problem in causal inference. To avoid bias, the effect estimator must control for all confounders. Hence practitioners often collect data for as many covariates as possible to raise the chances of including the relevant confounders. While this addresses the bias, this has the side effect of significantly increasing the number of data samples required to accurately estimate the effect due to the increased dimensionality. In this work, we consider the setting where out of a large number of covariates $X$ that satisfy strong ignorability, an unknown sparse subset $S$ is sufficient to include to achieve zero bias, i.e. $c$-equivalent to $X$. We propose a common objective function involving outcomes across treatment cohorts with nonconvex joint sparsity regularization that is guaranteed to recover $S$ with high probability under a linear outcome model for $Y$ and subgaussian covariates for each of the treatment cohort. This improves the effect estimation sample complexity so that it scales with the cardinality of the sparse subset $S$ and $\log |X|$, as opposed to the cardinality of the full set $X$. We validate our approach with experiments on treatment effect estimation.

Published
2020

27. Colloid-chemical properties of surfactant–nitric acid–water systems

Author

Lev Danilin, Tatyana Lugovitskaya, Elvira Kolmachikhina, and Denis Rogozhnikov

Subjects
nitric acid, surfactants, surface tension, micellization, leaching, Chemistry, QD1-999
Abstract

The behavior of the surfactants Tween 80, SaS and alkyl betaine in aqueous and nitric acid environments as promising additives for nitrate leaching of hard-to-process ore concentrates of non-ferrous metals was studied. The influence of surfactant concentration (0.04–1.28 g/dm3), nitric acid concentration (0.1–10 g/dm3) and temperature (295–343 K) on the surface tension, critical micelle concentration (CMC), pH and optical density of aqueous surfactant solutions and surfactant–HNO3–H2O systems was found. The critical micelle concentration of the surfactants used was estimated. A positive effect of nitric acid on the surface activity of surfactants was discovered, which manifests itself in a decrease in both the CMC and the surface tension at the liquid–gas interface. The values of surface activity and Gibbs energy of surfactant micelle formation in aqueous and nitric acid media were calculated. Associative processes in the solutions and compositions were confirmed by measuring the optical density of the systems under study.

Published
2023
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28. Kinetics of nitric acid leaching of bornite and chalcopyrite

Author

Yuri Shklyaev, Oleg Dizer, Tatiana Lugovitskaya, Dmitry Golovkin, and Denis Rogozhnikov

Subjects
copper, chalcopyrite, bornite, leaching, nitric acid, kinetics, Chemistry, QD1-999
Abstract

The paper presents a study of the process of nitric acid dissolution of the natural minerals chalcopyrite and bornite. The influence of various parameters, including temperature, nitric acid concentration and particle sizes, on this process was examined. Based on the data obtained, the values of apparent activation energy (57.41 and 42.98 kJ/mol for chalcopyrite and bornite, respectively), empirical orders with respect to nitric acid (1.62 and 1.57 for chalcopyrite and bornite, respectively) and with respect to particle size (–1.16 and –2.53 for chalcopyrite and bornite, respectively) were calculated using the shrinking core model. Generalized kinetic equations for the dissolution process of both minerals were derived. Based on the calculations performed, it was suggested that the dissolution processes of chalcopyrite and bornite under these conditions are limited by internal diffusion.

Published
2023
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29. Drug Repurposing for Cancer: An NLP Approach to Identify Low-Cost Therapies

Author

Subramanian, Shivashankar, Baldini, Ioana, Ravichandran, Sushma, Katz-Rogozhnikov, Dmitriy A., Ramamurthy, Karthikeyan Natesan, Sattigeri, Prasanna, Varshney, Kush R., Wang, Annmarie, Mangalath, Pradeep, and Kleiman, Laura B.

Subjects
Computer Science - Computation and Language, Computer Science - Machine Learning, Statistics - Machine Learning
Abstract

More than 200 generic drugs approved by the U.S. Food and Drug Administration for non-cancer indications have shown promise for treating cancer. Due to their long history of safe patient use, low cost, and widespread availability, repurposing of generic drugs represents a major opportunity to rapidly improve outcomes for cancer patients and reduce healthcare costs worldwide. Evidence on the efficacy of non-cancer generic drugs being tested for cancer exists in scientific publications, but trying to manually identify and extract such evidence is intractable. In this paper, we introduce a system to automate this evidence extraction from PubMed abstracts. Our primary contribution is to define the natural language processing pipeline required to obtain such evidence, comprising the following modules: querying, filtering, cancer type entity extraction, therapeutic association classification, and study type classification. Using the subject matter expertise on our team, we create our own datasets for these specialized domain-specific tasks. We obtain promising performance in each of the modules by utilizing modern language modeling techniques and plan to treat them as baseline approaches for future improvement of individual components.

Published
2019

30. Measurement of the ratio of branching fractions of the decays $\Lambda^0_b\!\to\psi(2S) \Lambda$ and $\Lambda^0_b\!\to J/\psi \Lambda$

Author

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., Romeu, J. Arnau, Artamonov, A., Artuso, M., Aslanides, E., Atzeni, M., Auriemma, G., Baalouch, M., Babuschkin, I., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Bencivenni, G., Ben-Haim, E., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., Bezshyiko, Ia., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bordyuzhin, I., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Brodzicka, J., Brundu, D., Buchanan, E., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chen, S., Cheung, S. F., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Cindolo, F., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., D'Ambrosio, C., d'Argent, P., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., de Vries, J. A., Dean, C. T., Decamp, D., Del Buono, L., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Dijkstra, H., Dordei, F., Dorigo, M., Reis, A. C. dos, Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Ebert, M., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farley, N., Farry, S., Fazzini, D., Federici, L., Féo, M., Ferguson, D., Fernandez, G., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Furfaro, E., Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Garsed, P. J., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gushchin, E., Guz, Yu., Gys, T., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henrard, P., Henry, L., Heß, M., Hicheur, A., Hill, D., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Ibis, P., Idzik, M., Ilten, P., Inyakin, A., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kosmyntseva, A., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Lefèvre, R., Leflat, A., Lefrançois, J., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Y., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lucchesi, D., Martinez, M. Lucio, Luo, H., Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nikodem, T., Nogay, A., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., O'Hanlon, D. P., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palutan, M., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petruzzo, M., Olloqui, E. Picatoste, Pietrzyk, B., Pietrzyk, G., Pikies, M., Pinci, D., Pisani, F., Pistone, A., Piucci, A., Placinta, V., Playfer, S., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Raniuk, I., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Alepuz, C. Remon, Renaudin, V., Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Valls, P. Ruiz, Vidal, J. Ruiz, Silva, J. J. Saborido, Sadykhov, E., Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Sirendi, M., Skidmore, N., Skwarnicki, T., Smith, E., Smith, I. T., Smith, J., Smith, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., Tilley, M. J., Tisserand, V., T'Jampens, S., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., van Beuzekom, M., van Herwijnen, E., van Tilburg, J., van Veghel, M., Gomez, R. Vazquez, Regueiro, P. Vazquez, Sierra, C. Vázquez, Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., Voropaev, N., Voß, C., Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. R. J., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xie, Y., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

Using $pp$ collisions corresponding to 3$\,\text{fb}^{-1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8$\,\text{TeV}$, the ratio of branching fractions \begin{align*} \mathcal{B}(\Lambda^0_b\!\to\psi(2S) \Lambda )/\mathcal{B}(\Lambda^0_b\!\to J/\psi \Lambda)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm 0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-041.html (LHCb public pages)

Published
2019
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31. 5G NR PRIVATE NETWORK COST EVALUATION IN TELECOMMUNICATIONS, CONSTRUCTION AND POWER DISTRIBUTION

Author

Danila Kondrashov, Evgeniy Rogozhnikov, Renat Abenov, Serafim Novichkov, Evgeniy Ageev, and Andrey Zhalsaraev

Subjects
5g, capex, opex, d-ran, c-ran, open ran, telecommunications, construction, electricity distribution, Engineering (General). Civil engineering (General), TA1-2040
Abstract

In the 5G concept, nonpublic networks can be used in any private enterprises. However, the most relevant at present is the introduction of private networks in priority sectors of the economy. These are such sectors as communications and telecommunications, production and distribution of electricity, as well as housing construction. The paper considers four scenarios for calculating the total cost of a 5G network, as well as three scenarios for deployment in various sectors. For calculations, the authors define the concepts of CAPEX and OPEX, and present the architecture of the 5G network. The calculation was performed by the optimal method in each individual scenario. The results of the work were obtained by mathematical modeling in the Matlab environment.

Published
2023
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32. CALCULATION OF THE TOTAL COST OF OWNERSHIP OF 5G NETWORK FOR DIFFERENT TYPES OF ARCHITECTURE: DISTRIBUTED RAN, CENTRALIZED RAN AND OPEN RAN

Author

Danila Kondrashov, Evgeniy Rogozhnikov, Renat Abenov, Serafim Novichkov, and Evgeniy Ageev

Subjects
5g, d-ran, c-ran, open ran, fronthaul, total cost, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Due to introduction of the 5G NR standard, an estimation of the total cost of ownership for 5G networks is required, as well as expenses optimization. This paper provides a comparative analysis of the total cost of ownership for 5G networks of various architectures. Various deployment scenarios for D-RAN (Distributed RAN), C-RAN (Centralized RAN) and Open RAN of the radio access network provided by this standard are considered. The results of the work were obtained using mathematical modeling in the Matlab environment.

Published
2023
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35. Purification of Copper Concentrate from Arsenic under Autoclave Conditions

Author

Kirill Karimov, Oleg Dizer, Maksim Tretiak, and Denis Rogozhnikov

Subjects
chalcopyrite, tennantite, pyrite, autoclave leaching, copper deposition, arsenic, Mining engineering. Metallurgy, TN1-997
Abstract

This study presents the results of a two-stage autoclave processing of a copper–arsenic concentrate. Copper concentrate is an important raw material to produce copper and other metals. However, in some cases, the concentrate may contain increased amounts of arsenic, which makes further processing difficult. Therefore, the development of modern hydrometallurgical methods for processing copper concentrate with a high arsenic content is an urgent task, which could lead to the optimization of the raw material processing process and the improvement of the quality of the concentrate. It has been established that the optimal conditions for the sequential two-stage autoclave processing of copper–arsenic concentrate are: t = 220–225 °C, τoxidation = 20 min, τtot = 90 min, Po2 = 0.4 MPa, and L:S = 10:1, [H2SO4]initial = 40 g/dm3; in this case, 85% of zinc, 44% of iron, and 78% of arsenic, respectively, are extracted into the solution during both stages and the loss of copper was about 0.01%. This is explained by the fact that at the first stage (oxidation) of the autoclave processing of the copper–arsenic concentrate, copper, together with iron, leaches into the solution, and at the second stage (reduction), copper precipitates out of the solution in the form of chalcocite. Copper in the residue after autoclave leaching is in the form of Cu2S, iron is in the form of pyrite (FeS2), and lead is in the form of anglesite (PbSO4), respectively. The obtained micrographs and EDX mappings clearly show no iron arsenates. This confirms that at the oxidative stage of the developed process, arsenic, removed by 78%, remains in the solution. The remaining arsenic is associated with tennantite, indicating the effectiveness of the treatment process in removing arsenic from the copper–arsenic concentrate. A second important observation is the presence of pronounced areas of copper sulfides in the microphotos without iron and arsenic impurities. This confirms that copper is deposited as chalcocite during the reduction phase of the process, which is the desired result.

Published
2024
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37. First measurement of charm production in fixed-target configuration at the LHC

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Féo, M., Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The first measurement of heavy-flavour production by the LHCb experiment in its fixed-target mode is presented. The production of $J/\psi$ and $D^0$ mesons is studied with beams of protons of different energies colliding with gaseous targets of helium and argon with nucleon-nucleon centre-of-mass energies of $\sqrt{s_{NN}} = 86.6 $ and $ 110.4$ ${\rm GeV}$, respectively. The $J/\psi$ and $D^0$ (including charge conjugate) production cross sections in $p{\rm He}$ collisions in the rapidity range $[2,4.6]$ are found to be $\sigma_{J/\psi} = 652 \pm 33$ (stat) $\pm 42$ (syst) nb$/$nucleon and $\sigma_{D^0} = 80.8 \pm 2.4$ (stat) $\pm 6.3$ (syst) $\mu$b$/$nucleon, where the first uncertainty is statistical and the second is systematic. No evidence for a substantial intrinsic charm content of the nucleon is observed in the large Bjorken-$x$ region., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-023.html

Published
2018
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38. Prompt $\Lambda^+_c$ production in $p\mathrm{Pb}$ collisions at $\sqrt{s_{NN}} = 5.02$ TeV

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The production of $\Lambda^+_c$ baryons produced directly at the interacting point is studied in proton-lead collisions collected with the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of $1.58\mathrm{nb}^{-1}$ recorded at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{NN}}=5.02$ TeV. Measurements of the differential cross-section and the forward-backward production ratio are reported for $\Lambda^+_c$ baryons with transverse momenta in the range $2

Published
2018
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39. Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era

Author

LHCb collaboration, Bediaga, I., Torres, M. Cruz, De Miranda, J. M., Gomes, A., Massafferri, A., Rodriguez, J. Molina, Reis, A. C. dos, Lavra, l. Soares, Aoude, R. Tourinho Jadallah, Amato, S., Akiba, K. Carvalho, Marinho, F. Da Cunha, De Paula, L., Rodrigues, F. Ferreira, Gandelman, M., Hicheur, A., Lopes, J. H., Nasteva, I., Goicochea, J. M. Otalora, Polycarpo, E., Potterat, C., Rangel, M. S., de Oliveira, L. Silva, De Paula, B. Souza, An, L., Chen, C., Davis, A., Gan, Y., Gao, Y., Gu, C., Jiang, F., Li, T., Liu, X., Ren, Z., Sun, J., Tang, Z., Wang, M., Xu, A., Xu, Z., Yang, Z., Zhang, L., Zhang, W. C., Zhu, X., Chefdeville, M., Decamp, D., Ghez, Ph., Marchand, J. F., Minard, M. -N., Pietrzyk, B., Reboud, M., T'Jampens, S., Tournefier, E., Ajaltouni, Z., Cogneras, E., Deschamps, O., Gazzoni, G., Hadjivasiliou, C., Kozeiha, M., Lefèvre, R., Maratas, J., Monteil, S., Perret, P., Quintana, B., Tisserand, V., Vernet, M., Romeu, J. Arnau, Aslanides, E., Cogan, J., Gerstel, D., Gac, R. Le, Leroy, O., Mancinelli, G., Martin, M., Meaux, C., Morris, A. B., Serrano, J., Tayduganov, A., Tsaregorodtsev, A., Amhis, Y., Balagura, V., Barsuk, S., Bossu, F., Chamont, D., Coelho, J. A. B., Desse, F., Fleuret, F., Lefrançois, J., Lisovskyi, V., Machefert, F., Benito, C. Marin, Maurice, E., Renaudin, V., Robbe, P., Schune, M. H., Usachov, A., Winn, M., Wormser, G., Zhang, Y., Ben-Haim, E., Bertholet, E., Billoir, P., Charles, M., Del Buono, L., Dujany, G., Gligorov, V. V., Mogini, A., Polci, F., Quagliani, R., Reiss, F., Robert, A., Sepulveda, E. S., Tou, D. Y., Beranek, S., Boubdir, M., Escher, S., Heister, A., Kirn, T., Langenbruch, C., Materok, M., Nieswand, S., Schael, S., Smith, E., Verlage, T. A., Whitehead, M., Zhukov, V., Albrecht, J., Birnkraut, A., Demmer, M., Eitschberger, U., Ekelhof, R., Gavardi, L., Heinicke, K., Ibis, P., Mackowiak, P., Meier, F., Mödden, A., Mombächer, T., Müller, J., Müller, V., Niet, R., Reichert, S., Schellenberg, M., Schmelzer, T., Seuthe, A., Spaan, B., Stevens, H., Tekampe, T., Wishahi, J., Dembinski, H. -P., Klimkovich, T., Schmelling, M., Zavertyaev, M., d'Argent, P., Bachmann, S., Berninghoff, D., Braun, S., Comerma-Montells, A., Dziewiecki, M., Gerick, D., Grabowski, J. P., Han, X., Hansmann-Menzemer, S., Kecke, M., Khanji, B., Kolpin, M., Kopecna, R., Leverington, B., Marks, J., Mitzel, D. S., Neubert, S., Neuner, M., Piucci, A., Skidmore, N., Stahl, M., Stemmle, S., Uwer, U., Zhelezov, A., McNulty, R., Veronika, N. V., De Serio, M., Fini, R. A., Palano, A., Pastore, A., Simone, S., Betti, F., Carbone, A., Falabella, A., Ferrari, F., Galli, D., Marconi, U., O'Hanlon, D. P., Patrignani, C., Soares, M., Vagnoni, V., Valenti, G., Zucchelli, S., Andreotti, M., Baldini, W., Bozzi, C., Calabrese, R., Corvo, M., Fiorini, M., Luppi, E., Minzoni, L., Pappalardo, L. L., Siddi, B. G., Tellarini, G., Tomassetti, L., Vecchi, S., Anderlini, L., Bizzeti, A., Graziani, G., Passaleva, G., Veltri, M., Albicocco, P., Bencivenni, G., Campana, P., Ciambrone, P., De Simone, P., Di Nezza, P., Klaver, S., Lanfranchi, G., Morello, G., Ogilvy, S., Palutan, M., Lener, M. Poli, Rotondo, M., Santimaria, M., Sarti, A., Sciascia, B., Cardinale, R., Cavallero, G., Fontanelli, F., Petrolini, A., Belloli, N., Calvi, M., Carniti, P., Cassina, L., Fazzini, D., Gotti, C., Matteuzzi, C., Fu, J., Gandini, P., Marangotto, D., Merli, A., Neri, N., Petruzzo, M., Brundu, D., Bursche, A., Cadeddu, S., Cardini, A., Chen, S., Contu, A., Fontana, M., Griffith, P., Lai, A., Loi, A., Manca, G., Oldeman, R., Saitta, B., Vacca, C., Amerio, S., Bertolin, A., Gallorini, S., Lucchesi, D., Lupato, A., Michielin, E., Morandin, M., Sestini, L., Simi, G., Bedeschi, F., Cenci, R., Lusiani, A., Morello, M. J., Punzi, G., Rama, M., Stracka, S., Walsh, J., Carboni, G., Federici, L., Santovetti, E., Satta, A., Bocci, V., Martellotti, G., Penso, G., Pinci, D., Santacesaria, R., Satriano, C., Sciubba, A., Aaij, R., Ali, S., Archilli, F., Bel, L. J., Benson, S., van Beuzekom, M., Dall'Occo, E., Dufour, L., Esen, S., Carvalho, M. Féo Pereira Rivello, Govorkova, E., Greim, R., Hulsbergen, W., Hynds, D., Jans, E., Koppenburg, P., Kostiuk, I., Merk, M., Mulder, M., Pellegrino, A., Gras, C. Sanchez, van Tilburg, J., Tuning, N., Sierra, C. Vázquez, van Veghel, M., Veronesi, M., Vitkovskiy, A., de Vries, J. A., Ketel, T., Raven, G., Syropoulos, V., Bhom, J., Brodzicka, J., Dziurda, A., Kucewicz, W., Kucharczyk, M., Lesiak, T., Malecki, B., Ossowska, A., Pikies, M., Witek, M., Dendek, A., Firlej, M., Fiutowski, T., Idzik, M., Krupa, W., Majewski, M. W., Moron, J., Oblakowska-Mucha, A., Rachwal, B., Swientek, K., Szumlak, T., Batozskaya, V., Klimaszewski, K., Krzemien, W., Melnychuk, D., Ukleja, A., Wislicki, W., Cojocariu, L., Ene, A., Giubega, L., Grecu, A., Maciuc, F., Placinta, V., Straticiuc, M., Alkhazov, G., Bondar, N., Chubykin, A., Dzyuba, A., Ivshin, K., Kotriakhova, S., Maev, O., Maisuzenko, D., Sagidova, N., Shcheglov, Y., Stepanova, M., Vorobyev, A., Belyaev, I., Danilina, A., Egorychev, V., Golubkov, D., Kvaratskheliya, T., Pereima, D., Savrina, D., Semennikov, A., Berezhnoy, A., Gorelov, I. V., Leflat, A., Nikitin, N., Volkov, V., Filippov, S., Gushchin, E., Kravchuk, L., Arzymatov, K., Baranov, A., Borisyak, M., Chekalina, V., Derkach, D., Hushchyn, M., Kazeev, N., Khairullin, E., Ratnikov, F., Rogozhnikov, A., Ustyuzhanin, A., Bondar, A., Eidelman, S., Krokovny, P., Kudryavtsev, V., Maltsev, T., Shekhtman, L., Vorobyev, V., Artamonov, A., Belous, K., Dzhelyadin, R., Guz, Yu., Obraztsov, V., Popov, A., Poslavskii, S., Romanovskiy, V., Shapkin, M., Stenyakin, O., Yushchenko, O., Albero, A. Alfonso, Gomez, M. Calvo, Camboni, A., Coquereau, S., Fernandez, G., Garrido, L., Gascon, D., Diaz, R. Graciani, Graugés, E., Vilasis-Cardona, X., Adeva, B., Alves Jr, A. A., Garcia, O. Boente, Borsato, M., Chobanova, V., Vidal, X. Cid, Suárez, A. Dosil, Prieto, A. Fernandez, Torreira, A. Gallas, Plana, B. Garcia, Martinez, M. Lucio, Santos, D. Martinez, Casasus, M. Plo, Prisciandaro, J., Pernas, M. Ramos, Vidal, A. Romero, Silva, J. J. Saborido, Sedes, B. Sanmartin, Rios, C. Santamarina, Regueiro, P. Vazquez, Diaz, M. Vieites, Alessio, F., Blago, M. P., Brodski, M., Buytaert, J., Byczynski, W., Perez, D. H. Campora, Cattaneo, M., Charpentier, Ph., Chitic, S. -G., Chrzaszcz, M., Ciezarek, G., Clemencic, M., Closier, J., Coco, V., Collins, P., Colombo, T., Coombs, G., Corti, G., Couturier, B., D'Ambrosio, C., Francisco, O. De Aguiar, De Bruyn, K., Di Canto, A., Dijkstra, H., Dordei, F., Dorigo, M., Durante, P., Färber, C., Declara, P. Fernandez, Ferro-Luzzi, M., Forty, R., Frank, M., Frei, C., Funk, W., Gaspar, C., Cardoso, L. A. Granado, Gruber, L., Gys, T., Haen, C., Hasse, C., Hatch, M., van Herwijnen, E., Jacobsson, R., Johnson, D., Joram, C., Jost, B., Karacson, M., Lacarrere, D., Lemaitre, F., Lindner, R., Lupton, O., Martinelli, M., Matev, R., Mathe, Z., Müller, D., Neufeld, N., Pearce, A., Altarelli, M. Pepe, Perazzini, S., Pinzino, J., Pisani, F., Ponce, S., Salzgeber, M. Ravonel, Roehrken, M., Roiser, S., Ruf, T., Schindler, H., Schmidt, B., Schopper, A., Schwemmer, R., Seyfert, P., Stagni, F., Stahl, S., Teubert, F., Thomas, E., Tolk, S., Valassi, A., Valat, S., Gomez, R. Vazquez, Barbosa, J. V. Viana, Voneki, B., Wyllie, K., Andreassi, G., Battista, V., Bay, A., Bellee, V., Blanc, F., De Cian, M., Lopes, L. Ferreira, Fitzpatrick, C., Gianì, S., Girard, O. G., Haefeli, G., Hopchev, P. H., Khurewathanakul, C., Kuonen, A. K., Macko, V., Marinangeli, M., Marino, P., Maurin, B., Nakada, T., Nanut, T., Nguyen, T. D., Nguyen-Mau, C., Pais, P. R., Pescatore, L., Pietrzyk, G., Redi, F., Rodrigues, A. B., Schneider, O., Schubiger, M., Stefko, P., Stramaglia, M. E., Tran, M. T., Atzeni, M., Bernet, R., Betancourt, C., Bezshyiko, Ia., Buonaura, A., Pardiñas, J. García, Graverini, E., Lancierini, D., Lionetto, F., Mauri, A., Müller, K., Owen, P., Navarro, A. Puig, Serra, N., Coutinho, R. Silva, Steinkamp, O., Storaci, B., Straumann, U., Vollhardt, A., Wang, Z., Weiden, A., Dovbnya, A., Kandybei, S., Koliiev, S., Pugatch, V., Bifani, S., Calladine, R., Chatzikonstantinidis, G., Farley, N., Ilten, P., Lazzeroni, C., Mazurov, A., Plews, J., Popov, D., Sergi, A., Watson, N. K., Williams, T., Zarebski, K. A., Adinolfi, M., Bhasin, S., Buchanan, E., Chapman, M. G., Dalseno, J., Harnew, S. T., Kariuki, J. M., Maddrell-Mander, S., Naik, P., Petridis, K., Pomery, G. J., Price, E., Prouve, C., Rademacker, J. H., Richards, S., Velthuis, J. J., Bettler, M. O., Cliff, H. V., Delaney, B., Tico, J. Garra, Gibson, V., Haines, S. C., Jones, C. R., Keizer, F., Kenzie, M., Lovell, G. H., Smeaton, J. G., Trisovic, A., Tully, A., Vitti, M., Ward, D. R., Williams, I., Wotton, S. A., Back, J. J., Blake, T., Gonzalo, A. Brossa, Sobral, C. M. Costa, Crocombe, A., Gershon, T., Kreps, M., Latham, T., Loh, D., Mathad, A., Millard, E., Poluektov, A., Wicht, J., Easo, S., Nandakumar, R., Papanestis, A., Ricciardi, S., Wilson, F. F., Carson, L., Clarke, P. E. L., Cowan, G. A., Currie, R., Eisenhardt, S., Gabriel, E., Gambetta, S., Gizdov, K., Muheim, F., Needham, M., Pappagallo, M., Petrucci, S., Playfer, S., Smith, I. T., Zonneveld, J. B., Alexander, M., Beddow, J., Bobulska, D., Dean, C. T., Douglas, L., Eklund, L., Karodia, S., Longstaff, I., Schiller, M., Soler, F. J. P., Spradlin, P., Traill, M., Bowcock, T. J. V., Casse, G., Dettori, F., Dreimanis, K., Farry, S., Lima, V. Franco, Harrison, T., Hennessy, K., Hutchcroft, D., Marshall, P. J., Mead, J. V., Rinnert, K., Shears, T., Wark, H. M., Yeomans, L. E., Cartelle, P. Alvarez, Baker, S., Egede, U., Golutvin, A., Hecker, M., Humair, T., Kress, F., McCann, M., Patel, M., Smith, M., Stefkova, S., Tilley, M. J., Websdale, D., Appleby, R. B., Barlow, R. J., Barter, W., Borghi, S., Burr, C., Capriotti, L., De Capua, S., Dutta, D., Gersabeck, E., Gersabeck, M., Grillo, L., Charman, R. Hidalgo, Hilton, M., Lafferty, G., Maguire, K., McNab, A., Murray, D., Parkes, C., Sarpis, G., Williams, M. R. J., Bjørn, M., Cazon, B. R. Gruberg, Hadavizadeh, T., Hancock, T. H., Harnew, N., Hill, D., Jalocha, J., John, M., Jurik, N., Malde, S., Murphy, C. H., Nandi, A., Pili, M., Pullen, H., Rollings, A., Veneziano, G., Vesterinen, M., Wilkinson, G., Boettcher, T., Craik, D. C., Weisser, C., Williams, M., Akar, S., Evans, T., Huard, Z. C., Meadows, B., Rodrigues, E., Schreiner, H. F., Sokoloff, M. D., Andrews, J. E., Hamilton, B., Jawahery, A., Parker, W., Wimberley, J., Artuso, M., Batsukh, B., Beiter, A., Blusk, S., Ely, S., Kelsey, M., Kim, K. E., Li, Z., Liang, X., Mountain, R., Polyakov, I., Rudolph, M. S., Skwarnicki, T., Stone, S., Venkateswaran, A., Wang, J., Wilkinson, M., Yao, Y., Yuan, X., Göbel, C., Guimaraes, V. 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Subjects
High Energy Physics - Experiment
Abstract

The LHCb Upgrade II will fully exploit the flavour-physics opportunities of the HL-LHC, and study additional physics topics that take advantage of the forward acceptance of the LHCb spectrometer. The LHCb Upgrade I will begin operation in 2020. Consolidation will occur, and modest enhancements of the Upgrade I detector will be installed, in Long Shutdown 3 of the LHC (2025) and these are discussed here. The main Upgrade II detector will be installed in long shutdown 4 of the LHC (2030) and will build on the strengths of the current LHCb experiment and the Upgrade I. It will operate at a luminosity up to $ 2 \times 10^{34} \rm cm^{-2}s^{-1}$, ten times that of the Upgrade I detector. New detector components will improve the intrinsic performance of the experiment in certain key areas. An Expression Of Interest proposing Upgrade II was submitted in February 2017. The physics case for the Upgrade II is presented here in more depth. $CP$-violating phases will be measured with precisions unattainable at any other envisaged facility. The experiment will probe $b\to s \ell^+\ell^-$ and $b\to d \ell^+\ell^-$ transitions in both muon and electron decays in modes not accessible at Upgrade I. Minimal flavour violation will be tested with a precision measurement of the ratio of $B(B^0\to\mu^+\mu^-)/B(B_s^0\to \mu^+\mu^-)$. Probing charm $CP$ violation at the $10^{-5}$ level may result in its long sought discovery. Major advances in hadron spectroscopy will be possible, which will be powerful probes of low energy QCD. Upgrade II potentially will have the highest sensitivity of all the LHC experiments on the Higgs to charm-quark couplings. Generically, the new physics mass scale probed, for fixed couplings, will almost double compared with the pre-HL-LHC era; this extended reach for flavour physics is similar to that which would be achieved by the HE-LHC proposal for the energy frontier., Comment: ISBN 978-92-9083-494-6 Version 3 with updated Fig. 2.1. A version of this document with higher quality images can be found at https://cds.cern.ch/record/2636441. Typo fixed in Table 6.5 (April 5 2019)

Published
2018

40. Angular moments of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ at low hadronic recoil

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Everett, C., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. 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Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

An analysis of the angular distribution of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ is presented, using data collected with the LHCb detector between 2011 and 2016 and corresponding to an integrated luminosity of approximately $5\,fb^{-1}$. Angular observables are determined using a moment analysis of the angular distribution at low hadronic recoil, corresponding to the dimuon invariant mass squared range $15 < q^{2} < 20\, GeV^2/c^4$. The full basis of observables is measured for the first time. The lepton-side, hadron-side and combined forward-backward asymmetries of the decay are determined to be \begin{align} A_{FB}^{l} & = -0.39 \pm 0.04\,\rm{stat} \pm 0.01\, \rm{syst}, \nonumber\\ A_{FB}^{h} & = -0.30 \pm 0.05\,\rm{stat} \pm 0.02\, \rm{syst}, \nonumber\\ A_{FB}^{lh} & = +0.25 \pm 0.04\,\rm{stat} \pm 0.01\, \rm{syst}. \nonumber \end{align} The measurements are consistent with Standard Model predictions., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-029.html

Published
2018
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41. Measurement of the relative $B^{-} \!\rightarrow D^{0} / D^{*0} / D^{**0} \mu^{-} \overline{\nu}_\mu$ branching fractions using $B^{-}$ mesons from $\overline{B}{}_{s2}^{*0}$ decays

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The decay of the narrow resonance $\overline{B}{}_{s2}^{*0}\!\rightarrow B^- K^+$ can be used to determine the $B^-$ momentum in partially reconstructed decays without any assumptions on the decay products of the $B^-$ meson. This technique is employed for the first time to distinguish contributions from $D^0$, $D^{*0}$, and higher-mass charmed states ($D^{**0}$) in semileptonic $B^-$ decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0 fb${}^{-1}$ collected with the LHCb detector in $pp$ collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive $B^- \!\rightarrow D^0 X \mu^- \overline{\nu}_\mu$ are $f_{D^0} = \mathcal{B}( B^- \rightarrow D^0\mu^-\overline{\nu}_\mu )/\mathcal{B}( B^- \rightarrow D^0 X \mu^- \overline{\nu}_\mu ) = 0.25 \pm 0.06$, $f_{D^{**0}} = \mathcal{B}( B^- \rightarrow ( D^{**0} \rightarrow D^0 X)\mu^-\overline{\nu}_\mu )/\mathcal{B}( B^- \rightarrow D^0 X \mu^- \overline{\nu}_\mu ) = 0.21 \pm 0.07$, with $f_{D^{*0}} = 1 - f_{D^0} - f_{D^{**0}}$ making up the remainder., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-024.html . v2 includes minor text changes and two additional subfigures added during journal review

Published
2018
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42. Search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

A search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays is presented using a sample of $pp$ collisions collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. The $C\!P$-violating asymmetries are measured to be $A_{\mathrm{CP}}^{pK^-} = -0.020 \pm 0.013\pm 0.019$ and $A_{\mathrm{CP}}^{p\pi^-} = -0.035 \pm 0.017 \pm 0.020 $, and their difference $A_{\mathrm{CP}}^{pK^-}-A_{\mathrm{CP}}^{p\pi^-} = 0.014 \pm 0.022 \pm 0.010$, where the first uncertainties are statistical and the second systematic. These are the most precise measurements of such asymmetries to date., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-025.html

Published
2018
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43. First observation of the doubly charmed baryon decay $\Xi_{cc}^{++}\rightarrow \Xi_{c}^{+}\pi^{+}$

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. 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Subjects
High Energy Physics - Experiment
Abstract

The doubly charmed baryon decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \pi^{+}$ is observed for the first time, with a statistical significance of $5.9\sigma$, confirming a recent observation of the baryon in the $\Lambda_c^{+} K^{-} \pi^{+} \pi^{+}$ final state. The data sample used corresponds to an integrated luminosity of $1.7\,\mathrm{fb}^{-1}$, collected by the LHCb experiment in $pp$ collisions at a center-of-mass energy of $13\mathrm{\,Te\kern -0.1em V}$. The $\Xi_{cc}^{++}$ mass is measured to be \begin{equation}\nonumber 3620.6\pm 1.5~(\text{stat})\pm 0.4~(\text{syst}) \pm 0.3~(\Xi_{c}^{+})~\text{MeV}/\it{c}^{2}, \end{equation} and is consistent with the previous result. The ratio of branching fractions between the decay modes is measured to be \begin{equation}\nonumber \frac{\mathcal{B} (\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \pi^{+}) \times \mathcal{B}(\Xi_{c}^{+} \rightarrow pK^{-}\pi^{+})} {\mathcal{B} (\Xi_{cc}^{++} \rightarrow \Lambda_c^{+} K^{-} \pi^{+} \pi^{+}) \times \mathcal{B}(\Lambda_c^{+} \rightarrow pK^{-}\pi^{+})} = 0.035\pm 0.009~(\text{stat}) \pm 0.003~(\text{syst}). \end{equation}, Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-026.html

Published
2018
Full Text
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44. Observation of $B_s^0 \to \overline{D}^{*0} \phi$ and search for $B^0 \to \overline{D}^0 \phi$ decays

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. 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C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. 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V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pinci, D., Pinzino, J., Pisani, F., Pistone, A., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The first observation of the $B_s^0 \to \overline{D}^{*0} \phi$ decay is reported, with a significance of more than seven standard deviations, from an analysis of $pp$ collision data corresponding to an integrated luminosity of 3 fb$^{-1}$, collected with the LHCb detector at centre-of-mass energies of $7$ and $8$ TeV. The branching fraction is measured relative to that of the topologically similar decay $B^0 \to \overline{D}^0 \pi^+\pi^-$ and is found to be $\mathcal{B}(B_s^0 \to \overline{D}^{*0} \phi) = (3.7 \pm 0.5 \pm 0.3 \pm 0.2) \times 10^{-5}$, where the first uncertainty is statistical, the second systematic, and the third from the branching fraction of the $B^0 \to \overline{D}^0 \pi^+\pi^-$ decay. The fraction of longitudinal polarisation in this decay is measured to be ${f_{\rm L} =(73 \pm 15 \pm 3)\%}$. The most precise determination of the branching fraction for the $B_s^0 \to \overline{D}^{0} \phi$ decay is also obtained, $\mathcal{B}(B_s^0 \to \overline{D}^{0} \phi) = (3.0 \pm 0.3 \pm 0.2 \pm 0.2) \times 10^{-5}$. An upper limit, $\mathcal{B}(B^0 \to \overline{D}^{0} \phi) < 2.0 \ (2.2) \times 10^{-6}$ at $90\%$ (95\%) confidence level is set. A constraint on the $\omega-\phi$ mixing angle $\delta$ is set at $|\delta| < 5.2^\circ~ (5.5^\circ)$ at $90\%$ ($95\%$) confidence level., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-015.html

Published
2018
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45. Observation of the decay $B_s^0 \to \overline{D}^0 K^+ K^-$

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bian, L., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Fernandez, G., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pinci, D., Pinzino, J., Pisani, F., Pistone, A., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The first observation of the $B_s^0 \to \overline{D}^0 K^+ K^-$ decay is reported, together with the most precise branching fraction measurement of the mode $B^0 \to \overline{D}^0 K^+ K^-$. The results are obtained from an analysis of $pp$ collision data corresponding to an integrated luminosity of $3.0~\textrm{fb}^{-1}$. The data were collected with the LHCb detector at centre-of-mass energies of $7$ and $8$ TeV. The branching fraction of the $B^0 \to \overline{D}^0 K^+ K^-$ decay is measured relative to that of the decay $B^0 \to \overline{D}^0 \pi^+ \pi^-$ to be $$\frac{\mathcal{B}(B^0 \to \overline{D}^0 K^+ K^-)}{\mathcal{B}(B^0 \to \overline{D}^0 \pi^+ \pi^-)} = (6.9 \pm 0.4 \pm 0.3)\%,$$ where the first uncertainty is statistical and the second is systematic. The measured branching fraction of the $B_s^0 \to \overline{D}^0 K^+ K^-$ decay mode relative to that of the corresponding $B^0$ decay is $$\frac{\mathcal{B}(B_s^0 \to \overline{D}^0 K^+ K^-)}{\mathcal{B}(B^0 \to \overline{D}^0 K^+ K^-)} = (93.0 \pm 8.9 \pm 6.9)\%.$$ Using the known branching fraction of ${B^0 \to \overline{D}^0 \pi^+ \pi^-}$, the values of ${{\mathcal B}(B^0 \to \overline{D}^0 K^+ K^- )=(6.1 \pm 0.4 \pm 0.3 \pm 0.3) \times 10^{-5}}$, and ${{\cal B}(B_s^0 \to \overline{D}^0 K^+ K^-)=}$ $(5.7 \pm 0.5 \pm 0.4 \pm 0.5) \times 10^{-5}$ are obtained, where the third uncertainties arise from the branching fraction of the decay modes ${B^0 \to \overline{D}^0 \pi^+ \pi^-}$ and $B^0 \to \overline{D}^0 K^+ K^-$, respectively., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-014.html

Published
2018
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46. Measurement of the $\Omega_c^0$ baryon lifetime

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

We report a measurement of the lifetime of the $\Omega_c^0$ baryon using proton-proton collision data at center-of-mass energies of 7 and 8~TeV, corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected by the LHCb experiment. The sample consists of about 1000 $\Omega_b^-\to\Omega_c^0\mu^-\bar{\nu}_{\mu} X$ signal decays, where the $\Omega_c^0$ baryon is detected in the $pK^-K^-\pi^+$ final state and $X$ represents possible additional undetected particles in the decay. The $\Omega_c^0$ lifetime is measured to be $\tau_{\Omega_c^0} = 268\pm24\pm10\pm2$ fs, where the uncertainties are statistical, systematic, and from the uncertainty in the $D^+$ lifetime, respectively. This value is nearly four times larger than, and inconsistent with, the current world-average value., Comment: 7 pages, 2 figures. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-028.html

Published
2018
Full Text
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47. Measurement of angular and CP asymmetries in $D^0\to\pi^+\pi^-\mu^+\mu^-$ and $D^0\to K^+K^-\mu^+\mu^-$ decays

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. 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Subjects
High Energy Physics - Experiment
Abstract

The first measurements of the forward-backward asymmetry of the dimuon pair ($A_{FB}$), the triple-product asymmetry ($A_{2\phi}$), and the charge-parity-conjugation asymmetry ($A_{CP}$), in $D^0\to\pi^+\pi^-\mu^+\mu^-$ and $D^0\to K^+K^-\mu^+\mu^-$ decays are reported. They are performed using data from proton-proton collisions collected with the LHCb experiment from 2011 to 2016, corresponding to a total integrated luminosity of 5 fb$^{-1}$. The asymmetries are measured to be \begin{align*} A_{FB}(D^0\to\pi^+\pi^-\mu^+\mu^-) &= (\phantom{-}3.3\pm3.7\pm0.6)\%,\\ A_{2\phi}(D^0\to\pi^+\pi^-\mu^+\mu^-)&= (-0.6\pm3.7\pm0.6)\%,\\ A_{CP}(D^0\to\pi^+\pi^-\mu^+\mu^-) &= (\phantom{-}4.9\pm3.8\pm0.7)\%,\\ A_{FB}(D^0\to K^+K^-\mu^+\mu^-) &= (0\pm11\pm2)\%,\\ A_{2\phi}(D^0\to K^+K^-\mu^+\mu^-)&= (9\pm11\pm1)\%,\\ A_{CP}(D^0\to K^+K^-\mu^+\mu^-) &= (0\pm11\pm2)\%, \end{align*} where the first uncertainty is statistical and the second systematic. The asymmetries are also measured as a function of the dimuon invariant mass. The results are consistent with the Standard Model predictions., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-020.html

Published
2018
Full Text
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48. Observation of the decay $\overline{B_s^0} \rightarrow \chi_{c2} K^+ K^- $ in the $\varphi$ mass region

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Fernandez, G., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hainge, J., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. 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K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The $\overline{B_s^0} \rightarrow \chi_{c2} K^+ K^- $ decay mode is observed and its branching fraction relative to the corresponding $\chi_{c1}$ decay mode, in a $\pm 15 \textrm{MeV}/c^2$ window around the $\phi$ mass, is found to be $\frac{\mathcal{B}(\overline{B_s^0} \rightarrow \chi_{c2} K^+ K^-) }{ \mathcal{B}(\overline{B_s^0} \rightarrow \chi_{c1} K^+ K^-)} = (17.1 \pm 3.1 \pm 0.4 \pm 0.9)\%,$ where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the branching fractions of radiative $\chi_c$ decays. The decay mode $\overline{B_s^0} \rightarrow \chi_{c1} K^+ K^- $ allows the $ B_s^0$ mass to be measured as $m(B_s^0) = 5366.83 \pm 0.25 \pm 0.27 \, \textrm{MeV}/c^2,$ where the first uncertainty is statistical and the second systematic. A combination of this result with other LHCb determinations of the $B_s^0$ mass is made., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2018-018.html

Published
2018
Full Text
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49. Search for beautiful tetraquarks in the $\Upsilon(1S)\mu\mu$ invariant-mass spectrum

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bian, L., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Krasilnikova, I., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The $\Upsilon(1S)\mu^+\mu^-$ invariant-mass distribution is investigated for a possible exotic meson state composed of two $b$ quarks and two $\overline{b}$ quarks, $X_{b\overline{b}b\overline{b}}$. The analysis is based on a data sample of $pp$ collisions recorded with the LHCb detector at centre-of-mass energies $\sqrt{s} =$ 7, 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb$^{-1}$. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the $X_{b\overline{b}b\overline{b}}$ state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range $[2.0,5.0]$, and the $X_{b\overline{b}b\overline{b}}$ state has rapidity in the range $[2.0,4.5]$ and transverse momentum less than 15 GeV/$c$., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-027.html

Published
2018
Full Text
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50. Observation of the decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bian, L., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Carvalho, M. Féo Pereira Rivello, Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matiunin, V., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Rodriguez, J. Molina, Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The Cabibbo-suppressed decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$ is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9fb$^{-1}$ of integrated luminosity at centre-of-mass energies of 7, 8 and 13TeV, respectively. The $\psi(2S)$ mesons are reconstructed in the $\mu^+\mu^-$ final state. The~branching fraction with respect to that of the $\Lambda^0_b\rightarrow\psi(2S)pK^-$ decay mode is measured to be $$\frac{\mathcal{B}\left(\Lambda^0_b\rightarrow\psi(2S)p\pi^- \right)} {\mathcal{B}\left(\Lambda^0_b\rightarrow\psi(2S)pK^-\right)}=\left(11.4 \pm 1.3 \pm 0.2\right)\!\%\,,$$ where the first uncertainty is statistical and the second is systematic. The $\psi(2S)p$ and $\psi(2S)\pi^-$ mass spectra are investigated and no evidence for exotic resonances is found., Comment: 16 pages, 2 figures. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-022.html

Published
2018
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