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Article ; Online: Plateau and driving pressure in the presence of spontaneous breathing.

Bellani, Giacomo / Grassi, Alice / Sosio, Simone / Foti, Giuseppe

2018 Volume 45, Issue 1, Page(s) 97–98

MeSH term(s)	Humans ; Respiration ; Respiratory Mechanics/physiology ; Work of Breathing/physiology
Language	English
Publishing date	2018-07-13
Publishing country	United States
Document type	Journal Article
ZDB-ID	80387-x
ISSN	1432-1238 ; 0340-0964 ; 0342-4642 ; 0935-1701
ISSN (online)	1432-1238
ISSN	0340-0964 ; 0342-4642 ; 0935-1701
DOI	10.1007/s00134-018-5311-9
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Article ; Online: A Calibration Technique for the Estimation of Lung Volumes in Nonintubated Subjects by Electrical Impedance Tomography.

Sosio, Simone / Bellani, Giacomo / Villa, Silvia / Lupieri, Ermes / Mauri, Tommaso / Foti, Giuseppe

Respiration; international review of thoracic diseases

2019 Volume 98, Issue 3, Page(s) 189–197

Abstract: Background: Electrical impedance tomography (EIT) is a bedside monitoring technique of the respiratory system that measures impedance changes within the thorax. The close correlation between variations in impedance (ΔZ) and lung volumes (Vt) is known. ... ...

Abstract	Background: Electrical impedance tomography (EIT) is a bedside monitoring technique of the respiratory system that measures impedance changes within the thorax. The close correlation between variations in impedance (ΔZ) and lung volumes (Vt) is known. Unless Vt is measured by an external reference (e.g., spirometry), its absolute value (in milliliters) cannot be determined; however, measurement of Vt would be useful in nonintubated subjects. Objective: To validate a simplified and feasible calibration method of EIT, which allows estimation of Vt in nonintubated subjects. Materials and methods: We performed a prospective study on 13 healthy volunteers. Subjects breathed 10 times in a nonexpandable "calibration balloon" with a known volume while wearing the EIT belt. The relationship between ΔZ and the balloon volume was calculated (ΔZ/Vt). Subsequently, subjects were connected to a mechanical ventilator by a mouthpiece under different settings. Vt was calculated from EIT measurements (VtEIT) by means of the ΔZ/Vt coefficient and compared with the value obtained from the ventilator (Vtflow). Results: There was a close correlation between Vtflow and VtEIT (r2 = 0.89). The fit equation was VtEIT = 0.9 × Vtflow +10.1. The highest correlation was found at positive endexpiratory pressure (PEEP) 0 (mean: VtEIT = 0.93 × Vtflow) versus PEEP 8 (mean: VtEIT = 0.8 × Vtflow), p = 0.01. No differences in the fit equation were found between pressure support ventilation (PSV) 0 and PSV 8, p = 0.50. Further analysis showed no statistically significant differences between sex, height, and BMI. Conclusion: A simple and fast EIT calibration technique enables reliable, noninvasive monitoring of Vt in nonintubated subjects.
MeSH term(s)	Adult ; Calibration ; Electric Impedance ; Female ; Healthy Volunteers ; Humans ; Lung Volume Measurements/instrumentation ; Lung Volume Measurements/methods ; Male ; Point-of-Care Systems ; Prospective Studies ; Reproducibility of Results ; Tidal Volume ; Tomography
Language	English
Publishing date	2019-06-13
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	206674-9
ISSN	1423-0356 ; 0025-7931
ISSN (online)	1423-0356
ISSN	0025-7931
DOI	10.1159/000499159
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Article ; Online: Driving Pressure Is Associated with Outcome during Assisted Ventilation in Acute Respiratory Distress Syndrome.

Bellani, Giacomo / Grassi, Alice / Sosio, Simone / Gatti, Stefano / Kavanagh, Brian P / Pesenti, Antonio / Foti, Giuseppe

Anesthesiology

2019 Volume 131, Issue 3, Page(s) 594–604

Abstract: What we already know about this topic: Higher driving pressure during controlled mechanical ventilation is known to be associated with increased mortality in patients with acute respiratory distress syndrome.Whereas patients with acute respiratory ... ...

Abstract	What we already know about this topic: Higher driving pressure during controlled mechanical ventilation is known to be associated with increased mortality in patients with acute respiratory distress syndrome.Whereas patients with acute respiratory distress syndrome are initially managed with controlled mechanical ventilation, as they improve, they are transitioned to assisted ventilation. Whether higher driving pressure assessed during pressure support (assisted) ventilation can be reliably assessed and whether higher driving pressure is associated with worse outcomes in patients with acute respiratory distress syndrome has not been well studied. What this article tells us that is new: This study shows that in the majority of adult patients with acute respiratory distress syndrome, both driving pressure and respiratory system compliance can be reliably measured during pressure support (assisted) ventilation.Higher driving pressure measured during pressure support (assisted) ventilation significantly associates with increased intensive care unit mortality, whereas peak inspiratory pressure does not.Lower respiratory system compliance also significantly associates with increased intensive care unit mortality. Background: Driving pressure, the difference between plateau pressure and positive end-expiratory pressure (PEEP), is closely associated with increased mortality in patients with acute respiratory distress syndrome (ARDS). Although this relationship has been demonstrated during controlled mechanical ventilation, plateau pressure is often not measured during spontaneous breathing because of concerns about validity. The objective of the present study is to verify whether driving pressure and respiratory system compliance are independently associated with increased mortality during assisted ventilation (i.e., pressure support ventilation). Methods: This is a retrospective cohort study conducted on 154 patients with ARDS in whom plateau pressure during the first three days of assisted ventilation was available. Associations between driving pressure, respiratory system compliance, and survival were assessed by univariable and multivariable analysis. In patients who underwent a computed tomography scan (n = 23) during the stage of assisted ventilation, the quantity of aerated lung was compared with respiratory system compliance measured on the same date. Results: In contrast to controlled mechanical ventilation, plateau pressure during assisted ventilation was higher than the sum of PEEP and pressure support (peak pressure). Driving pressure was higher (11 [9-14] vs. 10 [8-11] cm H2O; P = 0.004); compliance was lower (40 [30-50] vs. 51 [42-61] ml · cm H2O; P < 0.001); and peak pressure was similar, in nonsurvivors versus survivors. Lower respiratory system compliance (odds ratio, 0.92 [0.88-0.96]) and higher driving pressure (odds ratio, 1.34 [1.12-1.61]) were each independently associated with increased risk of death. Respiratory system compliance was correlated with the aerated lung volume (n = 23, r = 0.69, P < 0.0001). Conclusions: In patients with ARDS, plateau pressure, driving pressure, and respiratory system compliance can be measured during assisted ventilation, and both higher driving pressure and lower compliance are associated with increased mortality.
MeSH term(s)	Aged ; Cohort Studies ; Female ; Humans ; Lung/diagnostic imaging ; Lung/physiopathology ; Lung Compliance ; Male ; Middle Aged ; Patient Outcome Assessment ; Positive-Pressure Respiration/methods ; Positive-Pressure Respiration/mortality ; Respiratory Distress Syndrome, Adult/mortality ; Respiratory Distress Syndrome, Adult/therapy ; Retrospective Studies ; Tidal Volume ; Tomography, X-Ray Computed
Language	English
Publishing date	2019-07-23
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	269-0
ISSN	1528-1175 ; 0003-3022
ISSN (online)	1528-1175
ISSN	0003-3022
DOI	10.1097/ALN.0000000000002846
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Article: A Calibration Technique for the Estimation of Lung Volumes in Nonintubated Subjects by Electrical Impedance Tomography

Sosio, Simone / Bellani, Giacomo / Villa, Silvia / Lupieri, Ermes / Mauri, Tommaso / Foti, Giuseppe

Respiration

2019 Volume 98, Issue 3, Page(s) 189–197

Institution	Department of Medicine and Surgery, University of Milano Bicocca, Milan, Italy Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy Department of Anesthesia, Critical Care, and Emergency, Fondazione IRCCS Ca’Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
Abstract	Background: Electrical impedance tomography (EIT) is a bedside monitoring technique of the respiratory system that measures impedance changes within the thorax. The close correlation between variations in impedance (ΔZ) and lung volumes (Vt) is known. Unless Vt is measured by an external reference (e.g., spirometry), its absolute value (in milliliters) cannot be determined; however, measurement of Vt would be useful in nonintubated subjects. Objective: To validate a simplified and feasible calibration method of EIT, which allows estimation of Vt in nonintubated subjects. Materials and Methods: We performed a prospective study on 13 healthy volunteers. Subjects breathed 10 times in a nonexpandable “calibration balloon” with a known volume while wearing the EIT belt. The relationship between ΔZ and the balloon volume was calculated (ΔZ/Vt). Subsequently, subjects were connected to a mechanical ventilator by a mouthpiece under different settings. Vt was calculated from EIT measurements (Vt<sub>EIT</sub>) by means of the ΔZ/Vt coefficient and compared with the value obtained from the ventilator (Vt<sub>flow</sub>). Results: There was a close correlation between Vt<sub>flow</sub> and Vt<sub>EIT</sub> (r<sup>2</sup> = 0.89). The fit equation was Vt<sub>EIT</sub> = 0.9 × Vt<sub>flow</sub> +10.1. The highest correlation was found at positive endexpiratory pressure (PEEP) 0 (mean: Vt<sub>EIT</sub> = 0.93 × Vt<sub>flow</sub>) versus PEEP 8 (mean: Vt<sub>EIT</sub> = 0.8 × Vt<sub>flow</sub>), p = 0.01. No differences in the fit equation were found between pressure support ventilation (PSV) 0 and PSV 8, p = 0.50. Further analysis showed no statistically significant differences between sex, height, and BMI. Conclusion: A simple and fast EIT calibration technique enables reliable, noninvasive monitoring of Vt in nonintubated subjects.
Keywords	Electrical impedance tomography ; Respiratory monitoring ; Spontaneous ventilation ; Tidal volume
Language	English
Publishing date	2019-06-13
Publisher	S. Karger AG
Publishing place	Basel, Switzerland
Document type	Article
Note	Clinical Investigations
ZDB-ID	206674-9
ISSN	1423-0356 ; 0025-7931
ISSN (online)	1423-0356
ISSN	0025-7931
DOI	10.1159/000499159
Database	Karger publisher's database

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Article ; Online: Safe ECMO femoral decannulation by placement of inferior vena cava filter via internal jugular vein.

Castagna, Luigi / Maggioni, Elena / Coppo, Anna / Cortinovis, Barbara / Meroni, Veronica / Sosio, Simone / Vacirca, Francesco / Leni, Davide / Avalli, Leonello

Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs

2016 Volume 19, Issue 3, Page(s) 297–300

Abstract: Veno-arterial extracorporeal membrane oxygenation (ECMO) is a lifesaving treatment in patients with cardiogenic shock or cardiac arrest caused by massive pulmonary embolism. In these patients, positioning an inferior vena cava filter is often advisable, ... ...

Abstract	Veno-arterial extracorporeal membrane oxygenation (ECMO) is a lifesaving treatment in patients with cardiogenic shock or cardiac arrest caused by massive pulmonary embolism. In these patients, positioning an inferior vena cava filter is often advisable, especially if deep venous thrombosis is not resolved at the time of the ECMO suspension. Moreover, in ECMO patients, a high incidence of deep venous thrombosis at the site of venous cannulation has been reported, and massive pulmonary embolism following ECMO decannulation has been described. Nonetheless, an inferior vena cava filter cannot be positioned as long as an ECMO cannula is inside the inferior vena cava. Thus, we developed a strategy to allow placement of an inferior vena cava filter through the internal jugular concurrently with the removal of the femoral venous ECMO cannula. In two women supported by veno-arterial ECMO for cardiac arrest secondary to pulmonary embolism, this novel approach allowed for safe ECMO decannulation.
MeSH term(s)	Adult ; Catheterization/methods ; Device Removal/methods ; Extracorporeal Membrane Oxygenation/methods ; Female ; Heart Arrest/etiology ; Heart Arrest/surgery ; Humans ; Jugular Veins/surgery ; Pulmonary Embolism/complications ; Pulmonary Embolism/surgery ; Respiration, Artificial ; Vena Cava Filters ; Vena Cava, Inferior/surgery
Language	English
Publishing date	2016-09
Publishing country	Japan
Document type	Case Reports ; Journal Article
ZDB-ID	1463555-0
ISSN	1619-0904 ; 1434-7229
ISSN (online)	1619-0904
ISSN	1434-7229
DOI	10.1007/s10047-016-0892-y
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Article ; Online: Safety of anesthesia for children with mucopolysaccharidoses: A retrospective analysis of 54 patients.

Scaravilli, Vittorio / Zanella, Alberto / Ciceri, Valentina / Bosatra, Mariagrazia / Flandoli, Claudia / La Bruna, Alessia / Sosio, Simone / Parini, Rossella / Gasperini, Serena / Pesenti, Antonio / Moretto, Alessandra

Paediatric anaesthesia

2018 Volume 28, Issue 5, Page(s) 436–442

Abstract: Background: Complications are common during anesthesia for patients with mucopolysaccharidoses. San Gerardo Hospital (Italy) is a reference center for mucopolysaccharidoses with a dedicated pediatric anesthesia service.: Aims: This study aims to ... ...

Abstract	Background: Complications are common during anesthesia for patients with mucopolysaccharidoses. San Gerardo Hospital (Italy) is a reference center for mucopolysaccharidoses with a dedicated pediatric anesthesia service. Aims: This study aims to evaluate the safety of anesthesia for mucopolysaccharidoses patients, describe their anesthetic management at our institution, and assess risk factors for complications. Methods: The anesthetic charts of mucopolysaccharidoses patients admitted from January 1999 to December 2014 were retrospectively analyzed. We retrieved patients' demographics; location and type of the procedure; anesthetic approach airway management and occurrence of difficult intubation and complications and outcome at hospital discharge. A generalized linear mixed model was performed to assess risk factors for complications and difficult intubation. Results: Fifty-four consecutive children were included. The anesthetic charts of 232 procedures (52% radio-diagnostics, 15% orthopedics, 15% ear-nose-throat surgery, 10% neurosurgery, and 8% general surgery) were analyzed. Each patient underwent a median of 4 (1-6) procedures. The median age at the first procedure was 2 (1-5), and overall age was 5 (2-8) years old. One hundred and twenty-five (54%) procedures were performed in remote locations. General anesthesia was utilized for 100 (43%) procedures. No death was recorded. Twenty-one (9%) procedures had respiratory complications. Remote location anesthesia was associated with increased risk for complications (odds ratio 5.405 [1.355-28.571], P = .016). All planned intubations (n = 65) were successful. Nineteen (29%) of those were defined difficult. All emergency intubations (n = 3) failed and were rescued by laryngeal mask airways. Older age was associated with an increased risk of difficult intubation (OR 1.200 [1.019-1.436], P = .028). Conclusion: Patients with mucopolysaccharidoses are at high risk for anesthesia-related complications. Remote location anesthesia is associated with increased risk for complications, and older age is associated with increased risk for difficult intubation.
MeSH term(s)	Anesthesia, General/adverse effects ; Anesthesia, General/methods ; Child, Preschool ; Female ; Humans ; Infant ; Intraoperative Complications/etiology ; Intubation, Intratracheal ; Male ; Mucopolysaccharidoses/physiopathology ; Postoperative Complications/etiology ; Respiration, Artificial/adverse effects ; Retrospective Studies ; Risk Assessment/methods ; Risk Factors
Language	English
Publishing date	2018-04-23
Publishing country	France
Document type	Journal Article
ZDB-ID	1086049-6
ISSN	1460-9592 ; 1155-5645
ISSN (online)	1460-9592
ISSN	1155-5645
DOI	10.1111/pan.13379
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Article ; Online: Sedation and general anesthesia for patients with Cornelia De Lange syndrome: A case series.

Moretto, Alessandra / Scaravilli, Vittorio / Ciceri, Valentina / Bosatra, Mariagrazia / Giannatelli, Federica / Ateniese, Bianca / Mariani, Milena / Cereda, Anna / Sosio, Simone / Zanella, Alberto / Pesenti, Antonio / Selicorni, Angelo

American journal of medical genetics. Part C, Seminars in medical genetics

2016 Volume 172, Issue 2, Page(s) 222–228

Abstract: Cornelia De Lange syndrome (CdLS) is a rare congenital disease characterized by typical facial dysmorphism, developmental disability, and limb deficiency defects. Various congenital malformations and medical complications have been described with ... ...

Abstract	Cornelia De Lange syndrome (CdLS) is a rare congenital disease characterized by typical facial dysmorphism, developmental disability, and limb deficiency defects. Various congenital malformations and medical complications have been described with gastroesophageal reflux as the major one. CdLS patients often require multiple high-risk anesthetic procedures. At San Gerardo Hospital (Monza, Italy) the management of CdLS patients is routinely organized through a standard protocol and a dedicated pediatric anesthesia team has been implemented. We report on a retrospective descriptive analysis of the anesthetic records of the CdLS patients admitted to San Gerardo Hospital from January 2010 to December 2015. We retrieved: demographics, genetic profiles, type of procedures, anesthetic approaches, anesthetics usage and complications. Data are reported as median (interquartile range) values. Twenty-seven patients (11 female), with age 12 (7-15) years old, weight 24 (14-35) kg, and severity score of 25 (18-32) were included. NIBPL mutations were the most frequently represented. We analyzed 58 procedures (30 esophagogastroduodenoscopies, 8 evoked auditory potential tests, 5 radiodiagnostics, 5 catheters positioning, 4 bronchoscopies) managed by sedation (36) and general anesthesia (6). Each patient underwent one (1-2) anesthetic procedure. Propofol (59%), sevoflurane (31%), fentanyl (24%), and ketamine (10%) were used. Three out of six endotracheal intubations were difficult. The only documented intraoperative complications were three episodes of desaturation (oxygen saturation <90%) occurring during sedations and were managed without the need for an invasive control of the airways. Implementation of a specific management protocol and a dedicated allowed to provide anesthesia to CdLS patients without the occurrence of major complications. © 2016 Wiley Periodicals, Inc.
MeSH term(s)	Adolescent ; Anesthesia, General/adverse effects ; Anesthesia, General/methods ; Child ; De Lange Syndrome/complications ; De Lange Syndrome/drug therapy ; Humans ; Hypnotics and Sedatives/pharmacology ; Intraoperative Complications ; Male ; Retrospective Studies
Chemical Substances	Hypnotics and Sedatives
Language	English
Publishing date	2016-06
Publishing country	United States
Document type	Journal Article
ZDB-ID	2108622-9
ISSN	1552-4876 ; 0148-7299 ; 1552-4868
ISSN (online)	1552-4876
ISSN	0148-7299 ; 1552-4868
DOI	10.1002/ajmg.c.31493
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Article: Osteopathic Manual Treatment for Amyotrophic Lateral Sclerosis: A Feasibility Pilot Study.

Maggiani, Alberto / Tremolizzo, Lucio / Della Valentina, Andrea / Mapelli, Laurent / Sosio, Silvia / Milano, Valeria / Bianchi, Manuel / Badi, Francesco / Lavazza, Carolina / Grandini, Marco / Corna, Giovanni / Prometti, Paola / Lunetta, Christian / Riva, Nilo / Ferri, Alessandra / Lanfranconi, Francesca

The open neurology journal

2016 Volume 10, Page(s) 59–66

Abstract: Background: Current interventions in amyotrophic lateral sclerosis (ALS) are focused on supporting quality of life (QoL) and easing pain with a multidisciplinary approach.: Objective: Primary aim of this pilot work assessed feasibility, safety, ... ...

Abstract	Background: Current interventions in amyotrophic lateral sclerosis (ALS) are focused on supporting quality of life (QoL) and easing pain with a multidisciplinary approach. Objective: Primary aim of this pilot work assessed feasibility, safety, tolerability and satisfaction of osteopathic manual treatment (OMT) in 14 ALS outpatients. Methods: Patients were randomized according to an initial single-blind design (12 weeks, T0-T1), in order to receive OMT (weekly for 4 weeks, and fortnightly for the following 8 weeks) versus usual-care (n=7 each group), followed by an OMT open period (T1-T2, once a week for 8 weeks, n=10). Secondary aims included blind osteopathic assessment of somatic dysfunctions (SD) for goal attainment scale (GAS) calculation, Brief Pain Inventory-short form and McGill QoL-16 items. Results: OMT was demonstrated feasible and safe and patients displayed high satisfaction (T1-VAS=8.34 ± 0.46; T2-VAS=8.52 ± 0.60). Considering secondary aims no significant differences emerged. Finally, at study entry (T0), a cervico-dorsal SD was found in 78% of ALS patients versus 28% of healthy matched controls (p<0.01). Conclusion: OMT was found feasible, safe and satisfactory in ALS. The lack of secondary aim differences can be due to the limited sample size. OMT could be an interesting option to explore in ALS.
Language	English
Publishing date	2016-08-26
Publishing country	United Arab Emirates
Document type	Journal Article
ZDB-ID	2395982-4
ISSN	1874-205X
ISSN	1874-205X
DOI	10.2174/1874205X01610010059
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Article ; Online: Extracorporeal carbon dioxide removal through ventilation of acidified dialysate: an experimental study.

Zanella, Alberto / Mangili, Paolo / Giani, Marco / Redaelli, Sara / Scaravilli, Vittorio / Castagna, Luigi / Sosio, Simone / Pirrone, Federica / Albertini, Mariangela / Patroniti, Nicolò / Pesenti, Antonio

The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation

2014 Volume 33, Issue 5, Page(s) 536–541

Abstract: Background: Extracorporeal (EC) carbon dioxide (CO(2)) removal (ECCO(2)R) may be a powerful alternative to ventilation, possibly avoiding the need for mechanical ventilation and endotracheal intubation. We previously reported how an infusion of lactic ... ...

Abstract	Background: Extracorporeal (EC) carbon dioxide (CO(2)) removal (ECCO(2)R) may be a powerful alternative to ventilation, possibly avoiding the need for mechanical ventilation and endotracheal intubation. We previously reported how an infusion of lactic acid before a membrane lung (ML) effectively enhances ECCO(2)R. We evaluated an innovative ECCO(2)R technique based on ventilation of acidified dialysate. Methods: Four swine were sedated, mechanically ventilated, and connected to a venovenous dialysis circuit (blood flow, 250 ml/min). The dialysate was recirculated in a closed loop circuit including a ML (gas flow, 10 liters/min) and then returned to the dialyzer. In each animal, 4 different dialysis flows (DF) of 200, 400, 600, and 800 ml/min were evaluated with and without lactic acid infusion (2.5 mEq/min); the sequence was completed 3 times. At the end of each step, we measured the volume of CO(2)R by the ML (V(co2)ML) and collected blood and dialysate samples for gas analyses. Results: Acid infusion substantially increased V(co2)ML, from 33 ± 6 ml/min to 86 ± 7 ml/min. Different DFs had little effect on V(co2)ML, which was only slightly reduced at DF 200 ml/min. The partial pressure of CO(2) of blood passing through the dialysis filter changed from 60.9 ± 3.6 to 37.1 ± 4.8 mm Hg without acidification and to 32.5 ± 5.3 mm Hg with acidification, corresponding to a pH increase of 0.18 ± 0.03 and 0.03 ± 0.04 units, respectively. Conclusions: Ventilation of acidified dialysate efficiently increased ECCO(2)R of an amount corresponding to 35% to 45% of the total CO(2) production of an adult man from a blood flow as low as 250 ml/min.
MeSH term(s)	Animals ; Carbon Dioxide/blood ; Dialysis Solutions/chemistry ; Dialysis Solutions/pharmacology ; Disease Models, Animal ; Extracorporeal Membrane Oxygenation/methods ; Hydrogen-Ion Concentration ; Renal Dialysis/adverse effects ; Respiration, Artificial/methods ; Swine ; Ventilator-Induced Lung Injury/blood ; Ventilator-Induced Lung Injury/therapy
Chemical Substances	Dialysis Solutions ; Carbon Dioxide (142M471B3J)
Language	English
Publishing date	2014-05
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1062522-7
ISSN	1557-3117 ; 1053-2498
ISSN (online)	1557-3117
ISSN	1053-2498
DOI	10.1016/j.healun.2013.12.006
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Article ; Online: Indication of a deeply bound and compact K- pp state formed in the pp- -> pLambdaK+ reaction at 2.85 GeV.

Yamazaki, T / Maggiora, M / Kienle, P / Suzuki, K / Amoroso, A / Alexeev, M / Balestra, F / Bedfer, Y / Bertini, R / Bland, L C / Brenschede, A / Brochard, F / Bussa, M P / Choi, Seonho / Colantoni, M L / Dressler, R / Dzemidzic, M / Faivre, J-Cl / Ferrero, L /

Foryciarz, J / Fröhlich, I / Frolov, V / Garfagnini, R / Grasso, A / Heinz, S / Jacobs, W W / Kühn, W / Maggiora, A / Panzieri, D / Pfaff, H-W / Pontecorvo, G / Popov, A / Ritman, J / Salabura, P / Sosio, S / Tchalyshev, V / Vigdor, S E

Physical review letters

2010 Volume 104, Issue 13, Page(s) 132502

Abstract: We have analyzed data of the DISTO experiment on the exclusive pp --> pLambdaK+ reaction at 2.85 GeV to search for a strongly bound compact K- pp(approximately = X) state to be formed in the pp --> K+ + X reaction. The observed spectra of the K+ missing ... ...

Abstract	We have analyzed data of the DISTO experiment on the exclusive pp --> pLambdaK+ reaction at 2.85 GeV to search for a strongly bound compact K- pp(approximately = X) state to be formed in the pp --> K+ + X reaction. The observed spectra of the K+ missing mass and the pLambda invariant-mass with high transverse momenta of p and K+ revealed a broad distinct peak of 26-sigma confidence with a mass M(X)=2267+/-3(stat)+/-5(syst) MeV/c2 and a width Gamma(X)=118+/-8(stat)+/-10(syst) MeV. The enormously large cross section indicates formation of a compact K- pp with a large binding energy of B(K)=103 MeV, which can be a possible gateway toward cold and dense kaonic nuclear matter.
Language	English
Publishing date	2010-04-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.104.132502
Database	MEDical Literature Analysis and Retrieval System OnLINE

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